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Trichaster Flagellifer
''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae. Species: * ''Trichaster acanthifer'' Döderlein, 1927 * '' Trichaster flagellifer'' von Martens, 1866 *† '' Trichaster ornatus'' (Rasmussen, 1950) * ''Trichaster palmiferus ''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae Euryalidae is a family of echinoderms belonging to the order Euryalida. Genera There are eleven genera: * ''Asteromorpha'' Lütken, 1869 * ''Asteroschema'' Örsted & ...'' (Lamarck, 1816) References Phrynophiurida Ophiuroidea genera Taxa named by Alexander Agassiz Taxa described in 1836 {{ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoderm
An echinoderm () is any animal of the phylum Echinodermata (), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as larvae, as adults echinoderms are recognisable by their usually five-pointed radial symmetry (pentamerous symmetry), and are found on the sea bed at every ocean depth from the intertidal zone to the abyssal zone. The phylum contains about 7,600 living species, making it the second-largest group of deuterostomes after the chordates, as well as the largest marine-only phylum. The first definitive echinoderms appeared near the start of the Cambrian. Echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euryalidae
Euryalidae is a family of echinoderms belonging to the order Euryalida. Genera There are eleven genera: * ''Asteromorpha'' Lütken, 1869 * ''Asteroschema'' Örsted & Lütken, 1856 * ''Asterostegus'' Mortensen, 1933 * ''Astrobrachion'' Doederlein, 1927 * ''Astroceras'' Lyman, 1879 * ''Astrocharis'' Koehler, 1904 * ''Euryale (echinoderm), Euryale'' Lamarck, 1816 * ''Ophiocreas'' Lyman, 1879 * ''Squamophis'' Okanishi, O'Hara & Fujita, 2011 * ''Sthenocephalus'' Koehler, 1898 * ''Trichaster'' L. Agassiz, 1836 References Phrynophiurida Euryalidae, Echinoderm families Taxa named by John Edward Gray Taxa described in 1840 {{Ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichaster Acanthifer
''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae. Species: * '' Trichaster acanthifer'' Döderlein, 1927 * '' Trichaster flagellifer'' von Martens, 1866 *† '' Trichaster ornatus'' (Rasmussen, 1950) * ''Trichaster palmiferus ''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae Euryalidae is a family of echinoderms belonging to the order Euryalida. Genera There are eleven genera: * ''Asteromorpha'' Lütken, 1869 * ''Asteroschema'' Örsted & ...'' (Lamarck, 1816) References Phrynophiurida Ophiuroidea genera Taxa named by Alexander Agassiz Taxa described in 1836 {{ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichaster Flagellifer
''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae. Species: * ''Trichaster acanthifer'' Döderlein, 1927 * '' Trichaster flagellifer'' von Martens, 1866 *† '' Trichaster ornatus'' (Rasmussen, 1950) * ''Trichaster palmiferus ''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae Euryalidae is a family of echinoderms belonging to the order Euryalida. Genera There are eleven genera: * ''Asteromorpha'' Lütken, 1869 * ''Asteroschema'' Örsted & ...'' (Lamarck, 1816) References Phrynophiurida Ophiuroidea genera Taxa named by Alexander Agassiz Taxa described in 1836 {{ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichaster Ornatus
''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae. Species: * ''Trichaster acanthifer'' Döderlein, 1927 * ''Trichaster flagellifer'' von Martens, 1866 *† '' Trichaster ornatus'' (Rasmussen, 1950) * ''Trichaster palmiferus ''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae Euryalidae is a family of echinoderms belonging to the order Euryalida. Genera There are eleven genera: * ''Asteromorpha'' Lütken, 1869 * ''Asteroschema'' Örsted & ...'' (Lamarck, 1816) References Phrynophiurida Ophiuroidea genera Taxa named by Alexander Agassiz Taxa described in 1836 {{ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichaster Palmiferus
''Trichaster'' is a genus of echinoderms belonging to the family Euryalidae Euryalidae is a family of echinoderms belonging to the order Euryalida. Genera There are eleven genera: * ''Asteromorpha'' Lütken, 1869 * ''Asteroschema'' Örsted & Lütken, 1856 * ''Asterostegus'' Mortensen, 1933 * ''Astrobrachion'' Doederlein .... Species: * '' Trichaster acanthifer'' Döderlein, 1927 * '' Trichaster flagellifer'' von Martens, 1866 *† '' Trichaster ornatus'' (Rasmussen, 1950) * '' Trichaster palmiferus'' (Lamarck, 1816) References Phrynophiurida Ophiuroidea genera Taxa named by Alexander Agassiz Taxa described in 1836 {{ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phrynophiurida
The Phrynophiurida (formerly called Euryalae) are an order of brittle star 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 ...s containing the basket stars. Characteristics Phrynophiurida have bursae for gas exchange and excretion. Their ventral arm shields are rudimentary, and dorsal shields usually absent. Arms sometimes are branched, and can coil vertically. The vertebrae are joined by hourglass-shaped surfaces. The madreporite is on the oral surface. Digestive glands are confined to central disc. The integument is leathery, bearing calcareous granules or platelets. They generally live in deep-sea waters, coiling their arms on branched black coral. Systematics The Asteronychidae have a large disk and slender arms, and the Asteroschematidae have a small disk and stout arms. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophiuroidea Genera
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 locomotion. The ophiuroids generally have five long, slender, whip-like arms which may reach up to in length on the largest specimens. The Ophiuroidea contain two large clades, Ophiurida (brittle stars) and Euryalida (basket stars). Over 2,000 species of brittle stars live today. More than 1,200 of these species are found in deep waters, greater than 200 m deep. Range The ophiuroids diverged in the Early Ordovician. Ophiuroids can be found today in all of the major marine provinces, from the poles to the tropics. Basket stars are usually confined to the deeper parts of this range; Ophiuroids are known even from abyssal (>6,000 m) depths. However, brittle stars are also common members of reef communities, where they hide under rocks and even w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Alexander Agassiz
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
