Hemieuryalidae
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Hemieuryalidae
Hemieuryalidae is a family of echinoderms belonging to the order Amphilepidida Amphilepidida is an order of echinoderms belonging to the class Ophiuroidea Brittle stars, serpent stars, or ophiuroids (; ; referring to the serpent-like arms of the brittle star) are echinoderms in the class Ophiuroidea, closely related to .... Genera: * '' Actinozonella'' Stöhr, 2011 * '' Astrogymnotes'' H.L.Clark, 1914 * '' Hemieuryale'' von Martens, 1867 * '' Ophiochondrus'' * '' Ophioholcus'' Clark, 1915 * '' Ophioplocus'' Lyman, 1861 * '' Ophioplus'' Verrill, 1899 * '' Ophiozonella'' Matsumoto, 1915 * '' Ophiozonoida'' H.L.Clark, 1915 * '' Quironia'' A.H.Clark, 1934 * '' Sigsbeia'' Lyman, 1878 References Amphilepipida Echinoderm families {{ophiuroidea-stub ...
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Amphilepidida
Amphilepidida is an order of echinoderms belonging to the class Ophiuroidea Brittle stars, serpent stars, or ophiuroids (; ; referring to the serpent-like arms of the brittle star) are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their flexible arms for locomot .... Families: * Amphilepididae * Amphilimnidae * Amphiuridae * Hemieuryalidae * Ophiactidae * Ophiolepididae * Ophionereididae * Ophiopholidae * Ophiopsilidae * Ophiothamnidae * Ophiotrichidae References Ophiuroidea Echinoderm orders {{ophiuroidea-stub ...
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Echinoderms
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. Geolo ...
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