Psednos
Encyclopedia
Psednos is a genus of snailfish
es. There are currently 26 described species, with examples found in all the world's ocean
s.
Fish of this genus are similar to those of Paraliparis
but Psednos species have a distinctively curved spine
, giving them a "humpbacked" appearance.
Snailfish
Snailfish are scorpaeniform marine fish of the family Liparidae. Widely distributed from the Arctic to Antarctic Oceans including the northern Pacific, the snailfish family contains 30 genera and 361 species. They are closely related to the sculpins of the family Cottidae and the lumpfish of the...
es. There are currently 26 described species, with examples found in all the world's ocean
Ocean
An ocean is a major body of saline water, and a principal component of the hydrosphere. Approximately 71% of the Earth's surface is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas.More than half of this area is over 3,000...
s.
Fish of this genus are similar to those of Paraliparis
Paraliparis
Paraliparis is a genus of snailfishes. There are currently 112 described species found in benthic, benthopelagic and pelagic habitats in all the world's oceans....
but Psednos species have a distinctively curved spine
Vertebral column
In human anatomy, the vertebral column is a column usually consisting of 24 articulating vertebrae, and 9 fused vertebrae in the sacrum and the coccyx. It is situated in the dorsal aspect of the torso, separated by intervertebral discs...
, giving them a "humpbacked" appearance.
Species
Species include:- Psednos carolinaePsednos carolinaePsednos carolinae is a species of snailfish only known from a single male specimen collected in mid-Indian Ocean in 1964.This fish, 39 mm standard length, has a slender body and large head with the mouth angled upwards 90°. It can be distinguished from all other Psednos species by the low number of...
- Psednos micrurus
- Psednos rossiPsednos rossiPsednos rossi is a species of snailfish only known from the mesopelagic zone in the North Atlantic off Cape Hatteras, North Carolina.Although various morphological characters place this fish in the genus Psednos, it is dramatically different in appearance from all its congeners...
- Psednos steini