| Myriotrochus | |
|---|---|
 | |
| Myriotrochus sp. | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Holothuroidea |
| Order: | Apodida |
| Family: | Myriotrochidae |
| Genus: | Myriotrochus Steenstrup, 1851 |
| Species | |
18 extant, 1 extinct; see text | |
Myriotrochus is a genus of sea cucumbers in the family Myriotrochidae. [1]
As of 2024 [update] , 19 species and one subgenus are recognized by the World Register of Marine Species: [2]
Subgenus Oligotrochus Sars, 1866
Brittle stars, serpent stars, or ophiuroids 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 60 cm (24 in) in length on the largest specimens.
Holothuria is the type genus of the marine animal family Holothuriidae, part of the class Holothuroidea, commonly known as sea cucumbers. Members of the genus are found in coastal waters in tropical and temperate regions. They are soft-bodied, limbless invertebrates which dwell on the ocean floor and are usually detritivores. They resemble a cucumber in form. The genus contains some species that are harvested and sold as food.
The Asterinidae are a large family of sea stars in the order Valvatida.
Epischurella baikalensis is a species of copepod in family Temoridae. It is endemic to Lake Baikal, being the dominant zooplankton species there: 80%–90% of total biomass. It measures 1.5–2 mm (0.06–0.08 in).
The Brisingids are deep-sea-dwelling starfish in the order Brisingida.
Onchidiopsis glacialis is a species of small sea snail with a transparent internal shell, a marine gastropod mollusk in the family Velutinidae. Because the shell is mostly internal, the snail resembles a sea slug in general appearance.
Synaptidae is a family of sea cucumbers that have no tube feet, tentacle ampullae, retractor muscles, respiratory trees, or cuvierian tubules. They also lack radial canals of the water-vascular system, with only the circumoral ring present.
Cucumariidae is a family of sea cucumbers, marine animals with elongated bodies, leathery skins and tentacles that are found on the sea bed.
Leptasterias is a genus of starfish in the family Asteriidae. Members of this genus are characterised by having six arms although five-armed specimens sometimes occur. L. muelleri is the type species. The taxonomy of the genus is confusing and Leptasterias hexactis seems to be a species complex. Some species brood their eggs.
Phyllophoridae is a family of sea cucumbers, marine invertebrates with elongated bodies, leathery skins and feeding tentacles.
Chiridotidae is a family of sea cucumbers found in the order Apodida. Within the family, there are 16 recognized genera all with different ranges of body types and functions. Sea cucumbers play a fundamental role in many marine ecosystems.
Myriotrochidae is a family of sea cucumbers.
Ophiactis is a genus of brittle stars (Ophiuroidea).
Ophiacanthidae is a family of brittle stars. Axel Vilhelm Ljungman circumscribed this taxon in 1867; he initially named the subfamily Ophiacanthinae within the family Amphiuridae. Gordon L. J. Paterson promoted its rank to family in 1985.
Hemisphaeranthos is an extinct genus of sea cucumbers. The following species are recognised in the genus Hemisphaeranthos:
Laetmogonidae is a family of sea cucumbers.
Bathycrinus is a genus of crinoids.
Bourgueticrinidae is a family of crinoids, containing 2 genera.
Chiridota is a genus of sea cucumbers in the family Chiridotidae. It is an extant genus but some fossil species are known.
Thyone is a genus of sea cucumbers in the family Phyllophoridae.
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