Meoma ventricosa (red heart urchins) (San Salvador Island, Bahamas) 1 (15958822907)
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Description:
Summary[edit] Description: Clypeaster rosaceus - sand dollar urchin (dead), washed ashore onto a rocky shoreline. Heart urchins (irregular echinoids) have somewhat globular skeletons (tests) composed of interlocking calcite plates and covered in short, fur-like spines. The skeleton is bilaterally symmetrical, not pentaradially symmetrical as in the sea urchins. The upper side of the skeleton has the pattern of a 5-petaled star - each petal is an ambulacrum. The mouth and anus are at opposite ends of the long axis of the skeleton. Heart urchins are infaunal deposit feeders - they consume bulk sediments, digest any organic matter mixed in, and excrete large quantities of sediments. Locality: beach landward from Snapshot Reef, Fernandez Bay, western San Salvador Island, eastern Bahamas. Date: 25 March 2007, 16:11. Source: Meoma ventricosa (red heart urchins) (San Salvador Island, Bahamas) 1. Author: James St. John.
Included On The Following Pages:
- Life
- Cellular
- Eukaryota (eukaryotes)
- Opisthokonta (opisthokonts)
- Metazoa (animals)
- Bilateria
- Deuterostomia (deuterostomes)
- Echinodermata (echinoderms)
- Echinozoa
- Echinoidea (sea urchins)
- Clypeasteroida (Sand dollars)
- Clypeasteridae (sea biscuits)
- Clypeaster
- Clypeaster rosaceus (sea biscuit)
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- cc-by-3.0
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- James St. John
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- James St. John
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- Flickr user ID jsjgeology
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- Wikimedia Commons
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