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Psycheotrephes
''Psycheotrephes'' is a genus of sea cucumbers in the family Psychropotidae. Species The following species are recognised in the genus ''Psycheotrephes'': * '' Psycheotrephes discoveryi'' Rogacheva & Cross in Rogacheva et al., 2009 * '' Psycheotrephes exigua'' Théel, 1882 * '' Psycheotrephes magna'' Hansen, 1975 * '' Psycheotrephes recta'' (Vaney, 1908) References Holothuroidea genera Psychropotidae Taxa named by Johan Hjalmar Théel {{Holothuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psycheotrephes Exigua
''Psycheotrephes'' is a genus of sea cucumbers in the family Psychropotidae. Species The following species are recognised in the genus ''Psycheotrephes'': * ''Psycheotrephes discoveryi ''Psycheotrephes'' is a genus of sea cucumbers in the family Psychropotidae. Species The following species are recognised in the genus ''Psycheotrephes'': * '' Psycheotrephes discoveryi'' Rogacheva & Cross in Rogacheva et al., 2009 * '' Psycheot ...'' Rogacheva & Cross in Rogacheva et al., 2009 * '' Psycheotrephes exigua'' Théel, 1882 * '' Psycheotrephes magna'' Hansen, 1975 * '' Psycheotrephes recta'' (Vaney, 1908) References Holothuroidea genera Psychropotidae Taxa named by Johan Hjalmar Théel {{Holothuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psycheotrephes Magna
''Psycheotrephes'' is a genus of sea cucumbers in the family Psychropotidae. Species The following species are recognised in the genus ''Psycheotrephes'': * ''Psycheotrephes discoveryi'' Rogacheva & Cross in Rogacheva et al., 2009 * ''Psycheotrephes exigua ''Psycheotrephes'' is a genus of sea cucumbers in the family Psychropotidae. Species The following species are recognised in the genus ''Psycheotrephes'': * ''Psycheotrephes discoveryi ''Psycheotrephes'' is a genus of sea cucumbers in the fam ...'' Théel, 1882 * '' Psycheotrephes magna'' Hansen, 1975 * '' Psycheotrephes recta'' (Vaney, 1908) References Holothuroidea genera Psychropotidae Taxa named by Johan Hjalmar Théel {{Holothuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psychropotidae
Psychropotidae is a family of deep-sea swimming sea cucumbers. The geographic range of some psychropotids is very extensive at abyssal depths, whereas other species are found within more restricted ranges.P. A. Tyler & D. S. M. Billett (1988) The Reproductive Ecology of Elasipodid Holothurians from the N. E. Atlantic, Biological Oceanography, 5:4, 273-296, DOI: 10.1080/01965581.1987.10749518 Description "Psychropotidae are elongate in shape, with the anterior part of the dorsal surface depressed. Many psychropotids have a large posterior appendage. They usually have 10-20 tentacles and ventrolateral radii, each with a single row of many small tube feet." Like all holothurians, psychropotids have calcareous deposits, vestigial elements of the usual Echinoderm skeleton. "In psychropotids, These are essentially similar to other Holothuroidea, differing in a very low degree of calcification", instead consisting mainly of connective tissue. The calcareous ring and spicules of Holothuro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johan Hjalmar Théel
Johan Hjalmar Théel (14 June 1848 – 20 July 1937) was a Swedish zoologist and university professor. Early life Théel was born on 14 June 1848 in Säter, Sweden. He used to go on hunting trips along the coast of Norway in his youth and became fascinated by the plants and animals he encountered, especially the marine life. He met the zoologist Sven Ludvig Lovén who sparked his interest in sipunculid or peanut worms, especially the genus '' Phascolion''. He studied at Uppsala University and ''Phascolion'' was the subject for his thesis, written in 1875. He was also an artist and included his own illustrations in his published articles. In 1875, he accompanied the explorer Adolf Erik Nordenskiöld to the mouth of the Yenisei River in an attempt to find the Northeast Passage. He joined him on a similar voyage the following year and discovered a sea cucumber new to science, which he named ''Elpidia glacialis''. He was inducted into the Royal Swedish Academy of Sciences in 1884. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holothuroidea Genera
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. Sea cucumbers are found on the sea floor worldwide. The number of holothurian () species worldwide is about 1,717, 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. Like all echinoderms, sea cucumbers have an endoskeleton just below the skin, calcified structures that are usually reduced to isolated microscopic ossicles (or sclerietes) joined by connective tissue. In some species these can so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
