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Animals: Amphibians · Arachnids · Birds · Cnidaria · Crustaceans · Echinoderms · Fish · Insects · Mammals · Molluscs · Reptiles · Others Thelenota ananas , by Poco a poco Holothuria fuscogilva , by Poco a poco
An echinoderm (/ ɪ ˈ k aɪ n ə ˌ d ɜːr m, ˈ ɛ k ə-/) [2] is any animal of the phylum Echinodermata (/ ɪ ˌ k aɪ n oʊ ˈ d ɜːr m ə t ə /), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". [3]
Heterocentrotus trigonarius, [1] commonly known as the slate pencil urchin or red slate pencil urchin, [2] is found in the tropical waters of the Indo-Pacific region. [1] ...
Echinus is a genus of sea urchins.Sea urchins are echinoderms that are typically spherical or flattened with a covering of spine-like structures. Sea urchins tend to be important members of their ecosystems by grazing on other organisms and stabilizing populations.
This genus belongs to a group of genera allied to Lepiota with a white spore print, free (or almost free) gills, stipe easily separable from the cap and having a partial veil. [3]
Echinoderms (sea urchins, sea lilies, sea stars, crinoids, ...) are animals in the phylum Echinodermata. There are 5 subphyla, some of them being extinct: †Homalozoa, Crinozoa, Asterozoa, Echinozoa and †Blastozoa.
Holothuriidae is a family of sea cucumbers, a type of echinoderm. [1] Description
Ophiurida have bursae for respiration and excretion, and dorsal and ventral arm shields are present and usually well developed. Arms are unbranched and incapable of coiling vertically.