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Cainocrinidae
''Cainocrinidae'' is a family of echinoderms belonging to the order Isocrinida Isocrinida is an order of sea lilies which contains four extant families. Characteristics Members of this order are characterised by having a "heteromorphic" stalk; the stalk consists of a series of nodes with cirri, interspersed by several node .... Genera: * '' Nielsenicrinus'' Rasmussen, 1961 * '' Teliocrinus'' Döderlein, 1912 References Isocrinida Echinoderm families {{crinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isocrinida
Isocrinida is an order of sea lilies which contains four extant families. Characteristics Members of this order are characterised by having a "heteromorphic" stalk; the stalk consists of a series of nodes with cirri, interspersed by several nodes without cirri. There are additionally a whorl of cirri at the base on which the animal perches. The calyx is a shallow cup consisting of five basals and five radials. Families * Suborder Isocrinina Sieverts-Doreck, 1952 ** family Cainocrinidae Simms, 1988 -- 1 genus (1 species) ** family Isocrinidae Gislén, 1924 -- 3 genus (3 species) ** family Isselicrinidae Klikushkin, 1977 -- 4 genus (18 species) ** family Proisocrinidae Rasmussen, 1978 -- 1 genus (1 species) * Suborder Pentacrinitina Gray, 1842 † ** family Pentacrinitidae Gray, 1842 † Image:Neocrinus decorus.jpg, ''Neocrinus decorus'' (Isocrinidae) Image:Metacrinus rotundus by OpenCage.JPG, ''Metacrinus rotundus'' (Isselicrinidae) Image:Proisocrinus ruberrimus.jpg, ''Proiso ... [...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] |
