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Eudesicrinidae
''Eudesicrinidae'' is a family of echinoderms belonging to the order Millericrinida Millericrinida is an order of articulate crinoids that originated in the Anisian In the geologic timescale, the Anisian is the lower stage or earliest age of the Middle Triassic series or epoch and lasted from million years ago until millio .... Genera: * '' Eudesicrinus'' Loriol, 1882 * '' Proeudesicrinus'' Améziane-Cominardi & Bourseau, 1990 References Cyrtocrinida Echinoderm families {{crinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyrtocrinida
Cyrtocrinida is an order of sea lilies which contains two suborders and three families. Characteristics Members of this order have stems consisting of a single skeletal unit or a very small number of units. There are no cirri, and the expanded base of the stem attaches directly to the substrate. The calyx may be asymmetrical and consists of five arms attached to five radial ossicles. The arms subdivide at arm ossicle I or II. Families The World Register of Marine Species includes the following groups in the order: * Suborder Cyrtocrinina ** Family Sclerocrinidae Jaekel, 1918 * Suborder Holopodina ** Family Eudesicrinidae Bather, 1899 ** Family Holopodidae Holopodidae is a family of echinoderms belonging to the order Cyrtocrinida Cyrtocrinida is an order of sea lilies which contains two suborders and three families. Characteristics Members of this order have stems consisting of a single skeleta ... Zittel, 1879 References Articulata (Crinoidea) Echinoderm ord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millericrinida
Millericrinida is an order of articulate crinoids that originated in the Anisian In the geologic timescale, the Anisian is the lower stage or earliest age of the Middle Triassic series or epoch and lasted from million years ago until million years ago. The Anisian Age succeeds the Olenekian Age (part of the Lower Triassic ... (Middle Triassic). References Articulata (Crinoidea) Anisian first appearances Extant Middle Triassic first appearances Prehistoric animal orders Echinoderm orders {{crinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
