Berryteuthis
Encyclopedia
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 10 cm and 40 cm respectively. In both members, photophore
s are absent.
Squid
Squid are cephalopods of the order Teuthida, which comprises around 300 species. Like all other cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid, like cuttlefish, have eight arms arranged in pairs and two, usually longer, tentacles...
in the family Gonatidae
Gonatidae
The Gonatidae, also known as armhook squid, are a family of moderately-sized squid. The family contains approximately 19 species in three genera, widely distributed and plentiful in cold boreal waters of the Pacific Ocean...
, comprising two known species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
. The two members differ greatly in size
Cephalopod size
Size has been one of the most interesting aspects of cephalopod science to the general public. This article lists the largest cephalopods from various groups, sorted in order of mantle length, total length, weight, and shell diameter...
, with B. anonychus and B. magister reaching mature mantle
Mantle (mollusc)
The mantle is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself.In many, but by no means all, species of molluscs, the epidermis of the mantle secretes...
lengths of 10 cm and 40 cm respectively. In both members, photophore
Photophore
A photophore is a light-emitting organ which appears as luminous spots on various marine animals, including fish and cephalopods. The organ can be simple, or as complex as the human eye; equipped with lenses, shutters, color filters and reflectors...
s are absent.
Species
- Minimal Armhook SquidMinimal Armhook SquidThe Minimal Armhook Squid , also known as the Smallfin gonate squid, is a species of squid in the family Gonatidae. It is distinguished from other gonatids by the lack of hooks on all members, except for females on the base of arms I to III.-External links:*...
, Berryteuthis anonychus - Berryteuthis magister
- Magister Armhook SquidMagister Armhook SquidThe Magister Armhook Squid , also known as the Commander Squid or Schoolmaster Gonate Squid, is a medium-sized squid in the family Gonatidae. It is found in cold, high latitude waters of the North Pacific where it is among the most numerous squid species recorded.There are three recognised...
, Berryteuthis magister magister - Berryteuthis magister nipponensis
- Berryteuthis magister shevtsovi
- Magister Armhook Squid