File:Meoma ventricosa (red heart urchin) (Grand Cayman Island, Caribbean Sea) 1.jpg

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English: Clypeaster rosaceus - red heart urchin from the Cayman Islands. (aboral side)

Heart urchins (irregular echinoids) have somewhat globular skeletons (tests) composed of interlocking calcite plates. During life, the test is covered with 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. Heart urchins are infaunal deposit feeders - they consume bulk sediments, digest any organic matter mixed in, and excrete large quantities of sediments.

Classification: Animalia, Echinodermata, Echinoidea, Spatangoida, Clypeasteridae

Locality: Grand Cayman Island, south of Cuba, northwestern Caribbean Sea
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Source https://www.flickr.com/photos/47445767@N05/50512341946/
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/50512341946. It was reviewed on 21 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

21 October 2020

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current21:18, 21 October 2020Thumbnail for version as of 21:18, 21 October 20202,335 × 2,625 (3.13 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50512341946/ with UploadWizard

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