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Summary[
edit] Description: flabellina funeka aeolid nudibranch cape peninsula. Date: 2007. Source: Own work. Author:
Seascapeza.
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krokodiver|sourceurl=https://flickr.com/photos/125265709@N08/42927074862%7Carchive=https://web.archive.org/web/20190117085014/https://www.flickr.com/photos/125265709@N08/42927074862/%7Creviewdate=2019-01-26 11:50:26|reviewlicense=cc-by-2.0|reviewer=FlickreviewR 2
Wikimedia Commons
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krokodiver|sourceurl=https://flickr.com/photos/125265709@N08/41152033080%7Carchive=https://web.archive.org/web/20190120042150/https://www.flickr.com/photos/125265709@N08/41152033080/%7Creviewdate=2019-01-26 11:50:22|reviewlicense=cc-by-2.0|reviewer=FlickreviewR 2
Wikimedia Commons
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krokodiver|sourceurl=https://flickr.com/photos/125265709@N08/41166424820%7Carchive=https://web.archive.org/web/20190117085008/https://www.flickr.com/photos/125265709@N08/41166424820/%7Creviewdate=2019-01-26 11:50:24|reviewlicense=cc-by-2.0|reviewer=FlickreviewR 2
Wikimedia Commons
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Summary[
edit] Description: The bright colors warn predators of its bad taste,. It can swim by making a series of quick lateral, U-shaped bends to its body, first to one side, then to the other, as seen here. It feeds on hydroids. I wanted it to straighten out, but that is not its MO. Date: 17 June 2011, 17:25. Source:
Spanish Shawl Nudibranch (Flabellina iodinea). Author:
Jerry Kirkhart from Los Osos, Calif.
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Description: The Spanish shawl, Flabellina iodinea, is a species of aolid nudibranch, a very colorful sea slug. This is a marine gastropod mollusk in the family Flabellinidae. Date: 11 September 2004, 16:07. Source:
Spanish Shawl Uploaded by
berichard. Author:
Ed Bierman from CA, usa. Camera location
34° 01′ 50.2″ N, 119° 40′ 12.45″ W View all coordinates using:
OpenStreetMap 34.030611; -119.670124.
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Summary[
edit] Description: English: Spanish shawl elegant eolid nudibranch (Flabellinopsis iodinea). California, Monterey area. Date: 26 October 2010, 09:27. Source:
NOAA Photo Library:
fish4636. Author: Dr. Dwayne Meadows, NOAA/NMFS/OPR.
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Summary[
edit] Description: English: Spanish shawl nudibranch (Flabellina iodinea). California, Channel Islands NMS. Date: 13 October 2010, 10:14. Source:
NOAA Photo Library:
sanc0070. Author: Claire Fackler, CINMS, NOAA.
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Vertigo abyssinica Rensch
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Vertigo minutissima (Hartmann, 1821)
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Vertigo modestica arctica (Wallenberg, 1858)
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Vertigo sinistrorsa thaumasta Melvill & Ponsonby, 1891
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Vertigo minutissima (Hartmann, 1821)
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Vertigo clavella Rensch
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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: Hippopus hippopus (Linnaeus, 1758) - bear paw 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 bear paw clam 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, Heterodonta, Veneroida, Tridacnidae Locality: unrecorded/undisclosed/unspecified More info. at: en.wikipedia.org/wiki/Bear_paw_clam. Date: 3 January 2016, 16:24:47. Source:
https://www.flickr.com/photos/47445767@N05/24852328652/. Author: James St. John.
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Summary[
edit] Description: English: Laevicardium elatum (Sowerby, 1833) - giant Pacific cockle (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 Pacific cockle 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, Heterodonta, Veneroida, Cardiidae Locality: unrecorded/undisclosed/unspecified More info. at: en.wikipedia.org/wiki/Laevicardium and en.wikipedia.org/wiki/Laevicardium_elatum. Date: 3 January 2016, 17:14:55. Source:
https://www.flickr.com/photos/47445767@N05/24940193882/. 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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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.