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Summary[
edit] Description: English: Tellina magna Spengler, 1798 - great Caribbean tellin clam (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. The great Caribbean tellin clam shown above is part of the Caribbean Province: "The warm coral waters of the Caribbean stretching from northern Brazil to the Gulf of Mexico and northward adjacent to the Bahamas and Bermuda, contain a fauna of about 800 colorful species of common, shallow-water mollusks. The pink, or queen, conch and the sunrise tellin are typical." [info. from museum signage] Classification: Animalia, Mollusca, Bivalvia, Heterodonta, Veneroida, Tellinidae Locality: unrecorded/undisclosed/unspecified. Date: 4 January 2016, 12:01:14. Source:
https://www.flickr.com/photos/47445767@N05/25032625676/. Author: James St. John.
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Summary[
edit] Description: English: Macrocallista maculata (Linnaeus, 1758) - calico clam (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. The calico clam shown above is part of the Caribbean Province: "The warm coral waters of the Caribbean stretching from northern Brazil to the Gulf of Mexico and northward adjacent to the Bahamas and Bermuda, contain a fauna of about 800 colorful species of common, shallow-water mollusks. The pink, or queen, conch and the sunrise tellin are typical." [info. from museum signage] Classification: Animalia, Mollusca, Bivalvia, Heterodonta, Veneroida, Veneridae Locality: unrecorded/undisclosed/unspecified More info. at: en.wikipedia.org/wiki/Macrocallista_maculata. Date: 4 January 2016, 11:57:53. Source:
https://www.flickr.com/photos/47445767@N05/24965734901/. Author: James St. John.
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Summary[
edit] Description: English: Zirfaea pilsbryi Lowe, 1931 - Pacific rough piddock (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. The Pacific rough piddock shown above is part of the Oregonian Province: "The cool-water Oregonian Province along the Pacific Northwest Coast lies between the frigid Aleutian Province of Alaska and the warmer Southern Californian and Panamic Provinces. Because of harsh coastal conditions, most gastropods do not do well here. Bivalves at quieter depths predominate. The shells are fewer in kinds, lacking the bright colors, but occur in great numbers." [info. from museum signage] Classification: Animalia, Mollusca, Bivalvia, Heterodonta, Myoida, Pholadidae Locality: unrecorded/undisclosed/unspecified More info. at: en.wikipedia.org/wiki/Pholadidae. Date: 2 January 2016, 17:05:31. Source:
https://www.flickr.com/photos/47445767@N05/24301501923/. Author: James St. John.
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Atrina pen shell bivalves on a marine beach in Florida, USA (December 2012). Sanibel Island is one of dozens of barrier islands in the West-Central Florida Barrier Chain. This 191-mile long, slightly sinuous stretch of islands is located along the Gulf of Mexico coast of southern Florida. The southern-most island in the chain is Cape Romano Island. The northern-most islands are the Anclote Keys. Sanibel Island is located between Captiva Island and mainland Florida, just offshore from the towns of Fort Myers and Cape Coral, Florida. Much of Sanibel Island is developed, but significant tracts have been allowed to become wilderness - especially Ding Darling National Wildlife Refuge. Sanibel is on the southern side of Pine Island Sound, a large lagoon just south of Charlotte Harbor. A tidal inlet occurs on the island's western side - Blind Pass (a man-made construct). To the east of Sanibel is a moderately broad waterway - San Carlos Pass. Sanibel Island and nearby Captiva Island, North Captiva Island, and Cayo Costa Island are Holocene barriers that rim the southern and western sides of a Late Miocene depression that is now Pine Island Sound. Middle Miocene limestone bedrock was subject to significant dissolution and karst/cave development. The Pine Island Sound area was a large karst depression in the Late Miocene. It is now filled with sediments - most of modern Pine Island Sound is significantly shallow. Sanibel is famous for its shell-rich marine beaches. The Sanibel Island area has the 3rd-richest seashell beaches on Earth and the # 1 richest shell beaches in the Western Hemisphere. Shell collecting is best after a storm. The beach shown above is Algiers Beach, which is part of Gulfside City Park on the southern shoreline of Sanibel Island. About 99% of the shells on Sanibel Island beaches are bivalves (clams). Relatively few snails (gastropods) are present, but they are more common and conspicuous after storm events. Other marine remains observed on these beaches include sea urchins (echinoids), starfish (asteroids), crabs (decapods), horseshoe crabs (xiphosurans), sponges (poriferans), stony corals (anthozoan cnidarians), sea squirts (tunicates), sea hares (anaspidean opisthobranch gastropods), worm tubes, fish & fish skeletons, and stingray barbs. The dark-colored shells shown above are Atrina pen shells, which are distinctive bivalves having thin, brittle, brownish-colored shells. Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Pterioida, Pinnidae Locality: Algiers Beach, southern shore of Sanibel Island, Gulf of Mexico coast of southwestern Florida, USA (vicinity of 26° 25' 27.64" North latitude, 82° 03' 56.17" West longitude) West-Central Florida Barrier Chain geologic info. synthesized from: Evans et al. (1985) - Bedrock controls on barrier island development: west-central Florida coast. Marine Geology 63: 263-283. Davis (1989) - Morphodynamics of the West-Central Florida barrier system: the delicate balance between wave- and tide-domination. Proceedings, Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap Symposium, 'Coastal Lowlands, Geology and Geotechnology', 1987: 225-235. Evans et al. (1989) - Quaternary stratigraphy of the Charlotte Harbor estuarine-lagoon system, southwest Florida: implications of the carbonate-siliciclastic transition. Marine Geology 88: 319-348.
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Summary[
edit] Description: English: Sea slug Aplysia sp. (Israel). Date: 6 May 2019, 16:59:43. Source: Own work. Author:
Sofia Sadogurska.
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See
here for index to numbers. Cytherea Dione (Lamarck) =
Pitar dione = Hysteroconcha dione (Linnaeus 1758)
[1], opening view Cytherea Dione (Lamarck) = Pitar dione = Hysteroconcha dione (Linnaeus 1758)
[2], valve view Cytherea Dione (Lamarck) = Pitar dione = Hysteroconcha dione (Linnaeus 1758)
[3], hinge view Cardium aculeatum (Linné) =
Acanthocardia aculeata = (Linnaeus, 1767)
[4], valve from outside Cardium aculeatum (Linné) = Acanthocardia aculeata (Linnaeus, 1767)
[5], side view Hemicardium cardissa (Linné) =
Corculum cardissa (Linnaeus, 1758), valve from outside Hemicardium cardissa (Linné) = Corculum cardissa (Linnaeus, 1758), opening view Hemicardium cardissa (Linné) = Corculum cardissa (Linnaeus, 1758), frontside view Hemicardium cardissa (Linné) = Corculum cardissa (Linnaeus, 1758), backside view Tridacna squamosa (Lamarck) =
Tridacna squamosa Lamarck, 1819
[6], hinge view Tridacna squamosa (Lamarck) = Tridacna squamosa Lamarck, 1819
[7], opening view Tridacna squamosa (Lamarck) = Tridacna squamosa Lamarck, 1819
[8], valve from outside Tridacna squamosa (Lamarck) = Tridacna squamosa Lamarck, 1819
[9], valve from inside Hippopus maculatus (Lamarck) =
Hippopus hippopus (Linnaeus, 1758)
[10], hinge view
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Epioblasma personata (Say, 1829) - fine-rayed pearly mussel (CMC, Cincinnati Museum of Natural History & Science, Cincinnati, Ohio, USA) Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. Shown here is a rare freshwater bivalve shell of an extinct species, Epioblasma personata, the fine-rayed pearly mussel, also known as the round combshell. From museum signage: Mussels of the Little Miami River The Little Miami River flowing through the eastern portion of Cincinnati is a national scenic river. Of the nation's 4,000 rivers, only 165 have been honored with such a designation. A national scenic river is one that includes an "outstandingly remarkable" biologic community. Displayed here are the 50 types of native mussels that have been recorded from the river and its tributaries. Nine of these species are no longer found in the Little Miami system due to water quality deterioration. Water pollution has also caused the disappearance of 7 of the 113 fishes recorded from the river. With better control of soil erosion and improved treatment of sewage effluent, the missing mussel and fish species could return to the Little Miami basin. From museum signage: Vanished Mussels of the Cincinnati Area These animals are absent from the region's streams due to water pollution and the drowning of riffles behind dams. Classification: Animalia, Mollusca, Bivalvia, Palaeoheterodonta, Unionoida, Unionidae See info. at: en.wikipedia.org/wiki/Fine-rayed_pearly_mussel and en.wikipedia.org/wiki/Epioblasma
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Mollusc shells on a marine beach in Florida, USA (December 2013). Sanibel Island is one of dozens of barrier islands in the West-Central Florida Barrier Chain. This 191-mile long, slightly sinuous stretch of islands is located along the Gulf of Mexico coast of southern Florida. The southern-most island in the chain is Cape Romano Island. The northern-most islands are the Anclote Keys. Sanibel Island is located between Captiva Island and mainland Florida, just offshore from the towns of Fort Myers and Cape Coral, Florida. Much of Sanibel Island is developed, but significant tracts have been allowed to become wilderness - especially Ding Darling National Wildlife Refuge. Sanibel is on the southern side of Pine Island Sound, a large lagoon just south of Charlotte Harbor. A tidal inlet occurs on the island's western side - Blind Pass (a man-made construct). To the east of Sanibel is a moderately broad waterway - San Carlos Pass. Sanibel Island and nearby Captiva Island, North Captiva Island, and Cayo Costa Island are Holocene barriers that rim the southern and western sides of a Late Miocene depression that is now Pine Island Sound. Middle Miocene limestone bedrock was subject to significant dissolution and karst/cave development. The Pine Island Sound area was a large karst depression in the Late Miocene. It is now filled with sediments - most of modern Pine Island Sound is significantly shallow. Sanibel is famous for its shell-rich marine beaches. The Sanibel Island area has the 3rd-richest seashell beaches on Earth and the # 1 richest shell beaches in the Western Hemisphere. Shell collecting is best after a storm. The beach shown above is Algiers Beach, which is part of Gulfside City Park on the southern shoreline of Sanibel Island. About 99% of the shells on Sanibel Island beaches are bivalves (clams). Relatively few snails (gastropods) are present, but they are more common and conspicuous after storm events. Other marine remains observed on these beaches include sea urchins (echinoids), starfish (asteroids), crabs (decapods), horseshoe crabs (xiphosurans), sponges (poriferans), stony corals (anthozoan cnidarians), sea squirts (tunicates), sea hares (anaspidean opisthobranch gastropods), worm tubes, fish & fish skeletons, and stingray barbs. In the above photo, most of the shells are ark clams (Family Arcidae) and Chione cross-barred venus clams (Family Veneridae). I also see Donax coquina clams (Family Donacidae) and kitten's paws (Family Plicatulidae). Locality: marine beach immediately south of Sanibel Inn, southern shoreline of Sanibel Island, southwestern Florida, USA West-Central Florida Barrier Chain geologic info. synthesized from: Evans et al. (1985) - Bedrock controls on barrier island development: west-central Florida coast. Marine Geology 63: 263-283. Davis (1989) - Morphodynamics of the West-Central Florida barrier system: the delicate balance between wave- and tide-domination. Proceedings, Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap Symposium, 'Coastal Lowlands, Geology and Geotechnology', 1987: 225-235. Evans et al. (1989) - Quaternary stratigraphy of the Charlotte Harbor estuarine-lagoon system, southwest Florida: implications of the carbonate-siliciclastic transition. Marine Geology 88: 319-348.
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Quadrula metanevra (Rafinesque, 1820) - monkeyface mussel (CMC, Cincinnati Museum of Natural History & Science, Cincinnati, Ohio, USA) This species is also known as Theliderma metanevra. Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. Shown here is a modern freshwater bivalve shell of Quadrula metanevra, the monkeyface mussel. From museum signage: Mussels of the Little Miami River The Little Miami River flowing through the eastern portion of Cincinnati is a national scenic river. Of the nation's 4,000 rivers, only 165 have been honored with such a designation. A national scenic river is one that includes an "outstandingly remarkable" biologic community. Displayed here are the 50 types of native mussels that have been recorded from the river and its tributaries. Nine of these species are no longer found in the Little Miami system due to water quality deterioration. Water pollution has also caused the disappearance of 7 of the 113 fishes recorded from the river. With better control of soil erosion and improved treatment of sewage effluent, the missing mussel and fish species could return to the Little Miami basin. Classification: Animalia, Mollusca, Bivalvia, Palaeoheterodonta, Unionoida, Unionidae See info. at: en.wikipedia.org/wiki/Theliderma_metanevra and wwx.inhs.illinois.edu/collections/mollusk/publications/gu... and www.dnr.state.mn.us/rsg/profile.html?action=elementDetail...
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Shells of river molluscs - pea
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Summary[
edit] Description: English: Glossus humanus (Linnaeus, 1758) - oxheart clam (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. The oxheart clam shown above is part of the Lusitanian Province: "Concentrated in the mild temperatures of the Mediterranean Sea, and extending to the warmer waters of the Canary Islands and the cooler areas of France and Great Britain, is a fairly rich fauna. These waters support dozens of unique species, such as Jacob's scallop, the oxheart cockle and the European pelican's foot." [info. from museum signage] Classification: Animalia, Mollusca, Bivalvia, Myoida, Glossidae Locality: unrecorded/undisclosed/unspecified More info. at: en.wikipedia.org/wiki/Glossus_(genus) and en.wikipedia.org/wiki/Glossus_humanus. Date: 2 January 2016, 15:29:14. Source:
https://www.flickr.com/photos/47445767@N05/24685950582/. Author: James St. John.
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Fruticicola fruticum (Müller, 1774)), Sumy region
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Summary[
edit] Description: English: Glycymeris gigantea (Reeve, 1843) - giant bittersweet clam (interior surface) (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. The giant bittersweet clam shown above is part of the Panamic Province: "Much richer in species than its Caribbean counterpart, the tropical-water Panamic area extends from the Gulf of California, along the Pacific coast of Central America to Ecuador. Known for its wide tidal ranges, its sandy-mud shores and offshore waters abound in colorful murexes, cones, olives and cowries. Over 2,500 species are known from here, including the endemic tent olive." [info. from museum signage] Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Arcoida, Glycymerididae Locality: unrecorded/undisclosed/unspecified More info. at: en.wikipedia.org/wiki/Glycymeris_(genus). Date: 3 January 2016, 17:11:05. Source:
https://www.flickr.com/photos/47445767@N05/25058508335/. Author: James St. John.
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Identifier: reportonagricult01miss (
find matches)Title:
Report on the agriculture and geology of Mississippi. Embracing a sketch of the social and natural history of the stateYear:
1854 (
1850s)Authors:
Mississippi. State Geologist Wailes, Benjamin L. C. (Benjamin Leonard Covington), 1797-1862Subjects:
Geology Agriculture Natural historyPublisher:
(Jackson) E. Barksdale, State PrinterContributing Library:
The Library of CongressDigitizing Sponsor:
Sloan FoundationView Book Page:
Book ViewerAbout This Book:
Catalog EntryView All Images:
All Images From Book Click here to
view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:arctatus. Pinna argentea.Ringicula Miss.Sagaretus Miss.Solarium triliratum.Scalaria trigintanaria.Turritella Miss.Terebra diversum. tantula. Turbinellus Wilsoni. protracta. Triton Miss. subalveatum. crassidens. abbreviatus. Tellina lintea. pectorosa. serica. perovata. —: Vieks. Nuoleolites Mortoni. Lyelli. 288 GEOLOGY. Since the publication of the preceding list of theVicksburg fossils, it has been found that some of thesefossils should be referred to different genera; priority ofdescription rendering it proper, Mr. Conrad proposes torestore the original names. The following, therefore,must give way to the terms first applied by earliernaturalists. Bisoarea to Navicula. Chenopus to Aporrhais. Cassidaria to Morio. Citherea to Meretrix. Corbis to Fimbria. Fulgur to Busycon. lufundibulum to Trocliita. Loripa to Diplidonta. Melongena to Cassidula. Nucula to Leda. Pectimculus to Axinsea. Sigaretus to Stomatia. Solarium to Architectonica, Terebra to Acus. ra-lie. 2 8 9 BIVALVES Plate XIVText Appearing After Image:Crurno Uith by L.N. Rosenthal Ihil JCKSON TEKTIi^Sf SHEllS PLATE XIV,-SHELLS BIY ALVES. 1 a. Umbrella planulata (top).1 I. ■ (bottom). 2. Astarte paralis. 3. Corbuld bicarinata. 4. Leda multilineata. 5. Navicula aspersa. 6. Cardium nicoUeti.T. Crassatella flexura. 8. Glossus fillosus. 9. Corbula densata. 10. Ostrea trigonalis. 11. Pecten nuperum. Pa^e Z89 UNrVALVES Plate XVNote About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
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Mollusc shells on a marine beach in Florida, USA (December 2012). Sanibel Island is one of dozens of barrier islands in the West-Central Florida Barrier Chain. This 191-mile long, slightly sinuous stretch of islands is located along the Gulf of Mexico coast of southern Florida. The southern-most island in the chain is Cape Romano Island. The northern-most islands are the Anclote Keys. Sanibel Island is located between Captiva Island and mainland Florida, just offshore from the towns of Fort Myers and Cape Coral, Florida. Much of Sanibel Island is developed, but significant tracts have been allowed to become wilderness - especially Ding Darling National Wildlife Refuge. Sanibel is on the southern side of Pine Island Sound, a large lagoon just south of Charlotte Harbor. A tidal inlet occurs on the island's western side - Blind Pass (a man-made construct). To the east of Sanibel is a moderately broad waterway - San Carlos Pass. Sanibel Island and nearby Captiva Island, North Captiva Island, and Cayo Costa Island are Holocene barriers that rim the southern and western sides of a Late Miocene depression that is now Pine Island Sound. Middle Miocene limestone bedrock was subject to significant dissolution and karst/cave development. The Pine Island Sound area was a large karst depression in the Late Miocene. It is now filled with sediments - most of modern Pine Island Sound is significantly shallow. Sanibel is famous for its shell-rich marine beaches. The Sanibel Island area has the 3rd-richest seashell beaches on Earth and the # 1 richest shell beaches in the Western Hemisphere. Shell collecting is best after a storm. The beach shown above is Algiers Beach, which is part of Gulfside City Park on the southern shoreline of Sanibel Island. About 99% of the shells on Sanibel Island beaches are bivalves (clams). Relatively few snails (gastropods) are present, but they are more common and conspicuous after storm events. Other marine remains observed on these beaches include sea urchins (echinoids), starfish (asteroids), crabs (decapods), horseshoe crabs (xiphosurans), sponges (poriferans), stony corals (anthozoan cnidarians), sea squirts (tunicates), sea hares (anaspidean opisthobranch gastropods), worm tubes, fish & fish skeletons, and stingray barbs. Locality: Algiers Beach, southern shore of Sanibel Island, Gulf of Mexico coast of southwestern Florida, USA (vicinity of 26° 25' 27.64" North latitude, 82° 03' 56.17" West longitude) West-Central Florida Barrier Chain geologic info. synthesized from: Evans et al. (1985) - Bedrock controls on barrier island development: west-central Florida coast. Marine Geology 63: 263-283. Davis (1989) - Morphodynamics of the West-Central Florida barrier system: the delicate balance between wave- and tide-domination. Proceedings, Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap Symposium, 'Coastal Lowlands, Geology and Geotechnology', 1987: 225-235. Evans et al. (1989) - Quaternary stratigraphy of the Charlotte Harbor estuarine-lagoon system, southwest Florida: implications of the carbonate-siliciclastic transition. Marine Geology 88: 319-348.
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Summary[
edit] Description: English: Cryptopecten pallium (Linnaeus, 1758) - inteiror of a right valve of a royal cloak scallop (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) This species is also known as Gloripallium pallium Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. Scallops are distinctive bivalves with nearly symmetrical valves. The convexity and color of the two valves of an individual can vary dramatically in many species. The royal cloak scallop shown above is part of the Indo-West Pacific Province: "The world's largest and richest province extends from the Red Sea and East Africa across the Indian Ocean, then touches northern Australia and southern Japan to extend eastward throughout the "South Seas" to Hawaii and Easter Island. Probably 5,000 marine species are found in its shallow coral waters." [info. from museum signage] Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Pectinoida, Pectinidae Locality: unrecorded/undisclosed/unspecified. Date: 3 January 2016, 16:22:52. Source:
https://www.flickr.com/photos/47445767@N05/24855864001/. Author: James St. John.
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Summary[
edit] Description: English: Dinocardium robustum Lightfoot, 1786 - Atlantic giant cockle shell (modern) from Florida, USA. Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. In the close-up of the Atlantic giant cockle shell shown here, just left of center, there is an area of healed damage. The injury resulted in a temporary cessation of shell growth - note the well-demarcated growth line above the disturbed area. Classification: Animalia, Mollusca, Bivalvia, Heterodonta, Veneroida, Cardiidae Locality: beach on Sanibel Island or Cayo Costa Island, southwestern Florida, USA See info. at: en.wikipedia.org/wiki/Dinocardium_robustum. Date: 13 February 2017, 16:50:01. Source:
https://www.flickr.com/photos/47445767@N05/33020482192/. Author: James St. John.
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Atrina pen shell bivalves on a marine beach in Florida, USA (December 2012). Sanibel Island is one of dozens of barrier islands in the West-Central Florida Barrier Chain. This 191-mile long, slightly sinuous stretch of islands is located along the Gulf of Mexico coast of southern Florida. The southern-most island in the chain is Cape Romano Island. The northern-most islands are the Anclote Keys. Sanibel Island is located between Captiva Island and mainland Florida, just offshore from the towns of Fort Myers and Cape Coral, Florida. Much of Sanibel Island is developed, but significant tracts have been allowed to become wilderness - especially Ding Darling National Wildlife Refuge. Sanibel is on the southern side of Pine Island Sound, a large lagoon just south of Charlotte Harbor. A tidal inlet occurs on the island's western side - Blind Pass (a man-made construct). To the east of Sanibel is a moderately broad waterway - San Carlos Pass. Sanibel Island and nearby Captiva Island, North Captiva Island, and Cayo Costa Island are Holocene barriers that rim the southern and western sides of a Late Miocene depression that is now Pine Island Sound. Middle Miocene limestone bedrock was subject to significant dissolution and karst/cave development. The Pine Island Sound area was a large karst depression in the Late Miocene. It is now filled with sediments - most of modern Pine Island Sound is significantly shallow. Sanibel is famous for its shell-rich marine beaches. The Sanibel Island area has the 3rd-richest seashell beaches on Earth and the # 1 richest shell beaches in the Western Hemisphere. Shell collecting is best after a storm. The beach shown above is Algiers Beach, which is part of Gulfside City Park on the southern shoreline of Sanibel Island. About 99% of the shells on Sanibel Island beaches are bivalves (clams). Relatively few snails (gastropods) are present, but they are more common and conspicuous after storm events. Other marine remains observed on these beaches include sea urchins (echinoids), starfish (asteroids), crabs (decapods), horseshoe crabs (xiphosurans), sponges (poriferans), stony corals (anthozoan cnidarians), sea squirts (tunicates), sea hares (anaspidean opisthobranch gastropods), worm tubes, fish & fish skeletons, and stingray barbs. The dark-colored shells shown above are Atrina pen shells, which are distinctive bivalves having thin, brittle, brownish-colored shells. Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Pterioida, Pinnidae Locality: Algiers Beach, southern shore of Sanibel Island, Gulf of Mexico coast of southwestern Florida, USA (vicinity of 26° 25' 27.64" North latitude, 82° 03' 56.17" West longitude) West-Central Florida Barrier Chain geologic info. synthesized from: Evans et al. (1985) - Bedrock controls on barrier island development: west-central Florida coast. Marine Geology 63: 263-283. Davis (1989) - Morphodynamics of the West-Central Florida barrier system: the delicate balance between wave- and tide-domination. Proceedings, Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap Symposium, 'Coastal Lowlands, Geology and Geotechnology', 1987: 225-235. Evans et al. (1989) - Quaternary stratigraphy of the Charlotte Harbor estuarine-lagoon system, southwest Florida: implications of the carbonate-siliciclastic transition. Marine Geology 88: 319-348.
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Epioblasma torulosa torulosa (Rafinesque, 1820) - tubercled blossom (CMC, Cincinnati Museum of Natural History & Science, Cincinnati, Ohio, USA) Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) - they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments. Bivalves are also known as pelecypods and lamellibranchiates. Bivalves are sessile, benthic organisms - they occur on or below substrates. Most of them are filter-feeders, using siphons to bring in water, filter the water for tiny particles of food, then expel the used water. The majority of bivalves are infaunal - they burrow into unlithified sediments. In hard substrate environments, some forms make borings, in which the bivalve lives. Some groups are hard substrate encrusters, using a mineral cement to attach to rocks, shells, or wood. The fossil record of bivalves is Cambrian to Recent. They are especially common in the post-Paleozoic fossil record. Shown here is a rare freshwater bivalve shell of an extinct species, Epioblasma torulosa torulosa, the tubercled blossom. From museum signage: Mussels of the Little Miami River The Little Miami River flowing through the eastern portion of Cincinnati is a national scenic river. Of the nation's 4,000 rivers, only 165 have been honored with such a designation. A national scenic river is one that includes an "outstandingly remarkable" biologic community. Displayed here are the 50 types of native mussels that have been recorded from the river and its tributaries. Nine of these species are no longer found in the Little Miami system due to water quality deterioration. Water pollution has also caused the disappearance of 7 of the 113 fishes recorded from the river. With better control of soil erosion and improved treatment of sewage effluent, the missing mussel and fish species could return to the Little Miami basin. From museum signage: Vanished Mussels of the Cincinnati Area These animals are absent from the region's streams due to water pollution and the drowning of riffles behind dams. Classification: Animalia, Mollusca, Bivalvia, Palaeoheterodonta, Unionoida, Unionidae See info. at: en.wikipedia.org/wiki/Epioblasma_torulosa and en.wikipedia.org/wiki/Epioblasma
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Summary[
edit] Description: English: Mollusc shells on a marine beach in Florida, USA (December 2012). Several beaches along the Gulf of Mexico coast of southern Florida are famous for having an abundance of shells - they form moderately thick piles along the shoreline. The relative abundance and quality of shells varies from site to site and with weather & seasonal conditions. The shells shown above are 99% bivalves, but other organisms are also present. Ark clams are most common here, but I also see venus clams, scallop shells, and jewel box clams. Locality: Fort DeSoto Gulf Pier Beach - marine shoreline just north of the southwestern corner of Mullet Key, Fort DeSoto County Park, northwestern Tampa Bay, southwestern Florida, USA. Date: 18 December 2012, 16:59:00. Source:
https://www.flickr.com/photos/47445767@N05/25788256283/. Author: James St. John.
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Mollusc shells on a marine beach near the southern tip of Cayo Costa Island, Florida, USA (March 2014). Cayo Costa Island is one of dozens of barrier islands in the West-Central Florida Barrier Chain. This 191-mile long, slightly sinuous stretch of islands is located along the Gulf of Mexico coast of southern Florida. The southern-most island in the chain is Cape Romano Island. The northern-most islands are the Anclote Keys. Cayo Costa Island is located between North Captiva Island and Gasparilla Island, offshore from the towns of Fort Myers and Cape Coral, Florida. Most of Cayo Costa Island is a state park and is only accessible by boat. Cayo Costa is on the western side of Pine Island Sound, a large lagoon just south of Charlotte Harbor. Two large tidal inlets border Cayo Costa Island - Captiva Pass to the south and Boca Grande Pass to the north. Cayo Costa is a classic example of a drumstick barrier island - it is wide on its northern end and tapers to a point or hook on its southern end. This shape is the result of long-shore currents along the coastline. Other islands in the barrier chain also have this morphology. Cayo Costa Island and nearby North Captiva Island, Captiva Island, and Sanibel Island are Holocene barriers that rim the western and southern sides of a Late Miocene depression that is now Pine Island Sound. Middle Miocene limestone bedrock was subject to significant dissolution and karst/cave development. The Pine Island Sound area was a large karst depression in the Late Miocene. It is now filled with sediments - most of modern Pine Island Sound is significantly shallow. The beaches of Cayo Costa Island are famous for having an abundance of shells - they form moderately thick piles along much of the island's shoreline. The relative abundance and quality of shells varies from site to site and with weather & seasonal conditions. The shell deposits are dominated by bivalves. West-Central Florida Barrier Chain geologic info. synthesized from: Evans et al. (1985) - Bedrock controls on barrier island development: west-central Florida coast. Marine Geology 63: 263-283. Davis (1989) - Morphodynamics of the West-Central Florida barrier system: the delicate balance between wave- and tide-domination. Proceedings, Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap Symposium, 'Coastal Lowlands, Geology and Geotechnology', 1987: 225-235. Evans et al. (1989) - Quaternary stratigraphy of the Charlotte Harbor estuarine-lagoon system, southwest Florida: implications of the carbonate-siliciclastic transition. Marine Geology 88: 319-348.
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Summary[
edit] Description: English: Mollusc shells on a marine beach in Florida, USA (December 2012). Several beaches along the Gulf of Mexico coast of southern Florida are famous for having an abundance of shells - they form moderately thick piles along the shoreline. The relative abundance and quality of shells varies from site to site and with weather & seasonal conditions. The shells shown above are 99% bivalves, but other organisms are also present. Ark clams and venus clams are most common here, but I also see scallop shells and slipper snail shells. Locality: Fort DeSoto Gulf Pier Beach - marine shoreline just north of the southwestern corner of Mullet Key, Fort DeSoto County Park, northwestern Tampa Bay, southwestern Florida, USA. Date: 18 December 2012, 16:58:39. Source:
https://www.flickr.com/photos/47445767@N05/25788263413/. Author: James St. John.
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Mollusc shells on a marine beach in Florida, USA (December 2013). Sanibel Island is one of dozens of barrier islands in the West-Central Florida Barrier Chain. This 191-mile long, slightly sinuous stretch of islands is located along the Gulf of Mexico coast of southern Florida. The southern-most island in the chain is Cape Romano Island. The northern-most islands are the Anclote Keys. Sanibel Island is located between Captiva Island and mainland Florida, just offshore from the towns of Fort Myers and Cape Coral, Florida. Much of Sanibel Island is developed, but significant tracts have been allowed to become wilderness - especially Ding Darling National Wildlife Refuge. Sanibel is on the southern side of Pine Island Sound, a large lagoon just south of Charlotte Harbor. A tidal inlet occurs on the island's western side - Blind Pass (a man-made construct). To the east of Sanibel is a moderately broad waterway - San Carlos Pass. Sanibel Island and nearby Captiva Island, North Captiva Island, and Cayo Costa Island are Holocene barriers that rim the southern and western sides of a Late Miocene depression that is now Pine Island Sound. Middle Miocene limestone bedrock was subject to significant dissolution and karst/cave development. The Pine Island Sound area was a large karst depression in the Late Miocene. It is now filled with sediments - most of modern Pine Island Sound is significantly shallow. Sanibel is famous for its shell-rich marine beaches. The Sanibel Island area has the 3rd-richest seashell beaches on Earth and the # 1 richest shell beaches in the Western Hemisphere. Shell collecting is best after a storm. The beach shown above is Algiers Beach, which is part of Gulfside City Park on the southern shoreline of Sanibel Island. About 99% of the shells on Sanibel Island beaches are bivalves (clams). Relatively few snails (gastropods) are present, but they are more common and conspicuous after storm events. Other marine remains observed on these beaches include sea urchins (echinoids), starfish (asteroids), crabs (decapods), horseshoe crabs (xiphosurans), sponges (poriferans), stony corals (anthozoan cnidarians), sea squirts (tunicates), sea hares (anaspidean opisthobranch gastropods), worm tubes, fish & fish skeletons, and stingray barbs. In the above photo, most of the shells are ark clams (Family Arcidae) and Chione cross-barred venus clams (Family Veneridae). I also see scallops (Family Pectinidae), Donax coquina clams (Family Donacidae), and kitten's paws (Family Plicatulidae). Locality: marine beach immediately south of Sanibel Inn, southern shoreline of Sanibel Island, southwestern Florida, USA West-Central Florida Barrier Chain geologic info. synthesized from: Evans et al. (1985) - Bedrock controls on barrier island development: west-central Florida coast. Marine Geology 63: 263-283. Davis (1989) - Morphodynamics of the West-Central Florida barrier system: the delicate balance between wave- and tide-domination. Proceedings, Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap Symposium, 'Coastal Lowlands, Geology and Geotechnology', 1987: 225-235. Evans et al. (1989) - Quaternary stratigraphy of the Charlotte Harbor estuarine-lagoon system, southwest Florida: implications of the carbonate-siliciclastic transition. Marine Geology 88: 319-348.
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Mollusc shells on a marine beach near the southern tip of Cayo Costa Island, Florida, USA (March 2014). Cayo Costa Island is one of dozens of barrier islands in the West-Central Florida Barrier Chain. This 191-mile long, slightly sinuous stretch of islands is located along the Gulf of Mexico coast of southern Florida. The southern-most island in the chain is Cape Romano Island. The northern-most islands are the Anclote Keys. Cayo Costa Island is located between North Captiva Island and Gasparilla Island, offshore from the towns of Fort Myers and Cape Coral, Florida. Most of Cayo Costa Island is a state park and is only accessible by boat. Cayo Costa is on the western side of Pine Island Sound, a large lagoon just south of Charlotte Harbor. Two large tidal inlets border Cayo Costa Island - Captiva Pass to the south and Boca Grande Pass to the north. Cayo Costa is a classic example of a drumstick barrier island - it is wide on its northern end and tapers to a point or hook on its southern end. This shape is the result of long-shore currents along the coastline. Other islands in the barrier chain also have this morphology. Cayo Costa Island and nearby North Captiva Island, Captiva Island, and Sanibel Island are Holocene barriers that rim the western and southern sides of a Late Miocene depression that is now Pine Island Sound. Middle Miocene limestone bedrock was subject to significant dissolution and karst/cave development. The Pine Island Sound area was a large karst depression in the Late Miocene. It is now filled with sediments - most of modern Pine Island Sound is significantly shallow. The beaches of Cayo Costa Island are famous for having an abundance of shells - they form moderately thick piles along much of the island's shoreline. The relative abundance and quality of shells varies from site to site and with weather & seasonal conditions. The shell deposits are dominated by bivalves. West-Central Florida Barrier Chain geologic info. synthesized from: Evans et al. (1985) - Bedrock controls on barrier island development: west-central Florida coast. Marine Geology 63: 263-283. Davis (1989) - Morphodynamics of the West-Central Florida barrier system: the delicate balance between wave- and tide-domination. Proceedings, Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap Symposium, 'Coastal Lowlands, Geology and Geotechnology', 1987: 225-235. Evans et al. (1989) - Quaternary stratigraphy of the Charlotte Harbor estuarine-lagoon system, southwest Florida: implications of the carbonate-siliciclastic transition. Marine Geology 88: 319-348.