| Peniagone | |
|---|---|
 | |
| Peniagone vignoni specimine | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Holothuroidea |
| Order: | Elasipodida |
| Family: | Elpidiidae |
| Genus: | Peniagone Théel, 1882 [1] |
| Species | |
See text | |
| Synonyms | |
| |
Peniagone is a genus of deep-sea sea cucumbers in the family Elpidiidae. Peniagone wyvillii is the type species. [1]
The following species are recognised in the genus Peniagone: [1]
Sea cucumbers are echinoderms from the class Holothuroidea. They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. They are found on the sea floor worldwide. The number of known holothurian species worldwide is about 1,786, with the greatest number being in the Asia-Pacific region. Many of these are gathered for human consumption and some species are cultivated in aquaculture systems. The harvested product is variously referred to as trepang, namako, bêche-de-mer, or balate. Sea cucumbers serve a useful role in the marine ecosystem as they help recycle nutrients, breaking down detritus and other organic matter, after which bacteria can continue the decomposition process.
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.
Eulimidae is a family of very small parasitic sea snails, marine gastropod mollusks in the superfamily Vanikoroidea.
Cucumaria is a genus of sea cucumbers.
Elasipodida is an order of sea cucumbers. They have numerous appendages, including conical papillae and leaf-like tentacles. Although many species are benthic, a number are pelagic, and may have their appendages modified to form sails or fins. Most members of the order inhabit deep-sea environments, such as the species of the genus Enypniastes.
Psychropotes is a genus of sea cucumbers in the family Psychropotidae. The members of this genus possess the ability to swim, although this is only facultative.
Torquaratoridae is a family of acorn worms (Hemichordata) that lives in deep waters between 350 and 4000 meters. They can grow up to three feet in length and have semitransparent gelatinous bodies, often brightly colored.
Elpidiidae is a family of deep-sea sea cucumbers.
Elpidia is a genus of deep-sea sea cucumbers. Members are characterised by their rod-shaped spicules which each have two pairs of obliquely placed horizontal arms and two vertical apophyses. There is a high degree of endemism in this genus with different species occupying different deep sea basins or regions.
Peniagone vitrea is a species of deep-sea swimming sea cucumber in the family Elpidiidae. It is a detritivore and is found in the northern Pacific Ocean at abyssal depths. It was first described by the Swedish zoologist Hjalmar Théel in 1879, being one of the many deep sea animals discovered during the Challenger expedition of 1872–1876.
Ellipinion is a genus of deep-sea sea cucumbers in the family Elpidiidae. It was first described by the French marine biologist Edgard Hérouard in 1923.
Laetmogonidae is a family of sea cucumbers.
Psolus is a genus of sea cucumbers in the family Psolidae, marine animals with long bodies, leathery skins and tentacles, that inhabit the sea bed.
Benthodytes is a genus of sea cucumbers in the family Psychropotidae.
Psycheotrephes is a genus of sea cucumbers in the family Psychropotidae.
The Synallactidae are a family of sea cucumbers, part of the order Synallactida.
Mesothuria is a genus of sea cucumbers belonging to the family Synallactidae. The genus has a cosmopolitan distribution.
Pseudostichopus is a genus of sea cucumbers belonging to the monotypic family Pseudostichopodidae. The genus has a cosmopolitan distribution.
Protelpidia is a monotypic genus of deep-sea sea cucumbers.
Synallactes is a genus of sea cucumbers in the family Synallactidae. The type species of this genus is Synallactes alexandri.
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