Gonatidae

species of mollusc

The Gonatidae, also known as armhook squid, are a family of moderately sized squid. The family contains about 19 species in three genera, widely distributed and plentiful in cold boreal waters of the Pacific Ocean. At least one species is known from Antarctic waters, and two from the North Atlantic. The genus Eogonatus was created for the species known as Eogonatus tinro because it did not have hooks on the tentacular club and it has 5 rows of teeth on the radula. Molecular studies in allozymes and mitochondrial DNA have indicated that this species nests within the genus Gonatus, although othe

species of mollusc

Berryteuthis is a genus of squid in the family Gonatidae, comprising two known species. The two members differ greatly in size, with B. anonychus and B. magister reaching mature mantle lengths of and respectively. In both members, photophores are absent.

thumb | right | alt=Gonatopsis borealis | Gonatopsis borealis Gonatopsis is a genus of squid from the family Gonatidae. They are characterised by the loss of their tentacles by the time they have reach the subadult stage. They have arms which have two series of hooks along the midline of the oral surface arms, the radula has five or seven teeth, the mantle can be muscular or flabby, fins are rhomboid or arrow shaped and they lack photophores. They are found in the North Pacific.

species of mollusc

species of mollusc