| Magnapinna talismani | |
|---|---|
 | |
| Holotype of Magnapinna talismani (61-millimetre or 2.4-inch ML) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Oegopsida |
| Family: | Magnapinnidae |
| Genus: | Magnapinna |
| Species: | M. talismani |
| Binomial name | |
| Magnapinna talismani | |
| Synonyms [1] | |
| |
Magnapinna talismani is a species of bigfin squid known only from a single damaged specimen. It is characterised by small white nodules present on the ventral surface of its fins.
The holotype of M. talismani is a specimen of 61-millimetre (2.4 in) mantle length (ML) collected in the northern Atlantic Ocean, south of the Azores, at 34°46′N36°11′W / 34.767°N 36.183°W . It was caught by an open bottom trawl at a depth of up to 3,175 m (10,420 ft). The capture location of this specimen is very near to that of the as-yet undescribed Magnapinna sp. B.
M. talismani was originally placed in the genus Chiroteuthopsis, which is now considered a junior synonym of Mastigoteuthis . Mastigoteuthis talismani was subsequently placed in the genus Magnapinna by Michael Vecchione and Richard E. Young in 2006.
The Mastigoteuthidae, also known as whip-lash squid, are a family of small deep-sea squid. Approximately 20 known species in six genera are represented, with members found in both the mesopelagic and bathypelagic zone of most oceans. Originally described by Verill in 1881, it was later lowered by Chun (1920) to a subfamily (Mastigoteuthinae) of the Chiroteuthidae. However, Roper et al. (1969) raised it back to the family level, and this has not been changed since. The taxonomy of this family is extremely unstable, and there have been at times one genus, two genera and four subgenera(Salcedo-Vargas & Okutani, 1994), two genera and several 'groups', five genera and one species with an uncertain placement, or six genera.
Bigfin squids are a group of rarely seen cephalopods with a distinctive morphology. They are placed in the genus Magnapinna and family Magnapinnidae. Although the family is known only from larval, paralarval, and juvenile specimens, some authorities believe adult specimens have also been seen. Several videos have been taken of animals nicknamed the "long-arm squid", which appear to have a similar morphology. Since none of the seemingly adult specimens has ever been captured or sampled, it remains uncertain if they are of the same genus or only relatives.
Magnapinna atlantica, previously known as "Magnapinna sp. A", is a species of bigfin squid known from only two specimens collected in the northern Atlantic Ocean. It is characterised by several unique morphological features: the tentacle bases are narrower than adjacent arm bases, the proximal tentacle lacks suckers but possesses glandular structures, and the animal's pigment is contained mostly in functional chromatophores.
Magnapinna pacifica is a species of bigfin squid known only from three immature specimens; two caught at a depth of less than 300 m and one from a fish stomach. M. pacifica is the type species of the genus Magnapinna. It is characterised primarily by its proximal tentacles, which are wider than adjacent arms and bear numerous suckers.
Magnapinna sp. B is an undescribed species of bigfin squid known only from a single immature specimen collected in the northern Atlantic Ocean.
Magnapinna sp. C is an undescribed species of bigfin squid known only from a single specimen of 79-millimetre (3.1 in) mantle length (ML) collected in the southern Atlantic Ocean and held in the Natural History Museum.
Promachoteuthis sloani is a species of squid from the northern Atlantic Ocean. It is known from only three specimens and very little is understood of its biology. P. sloani is characterised by several morphological features: nuchal fusion is absent between the head and mantle, the arms generally bear 3–4 series of suckers, and papillae are present on the tentacles.
Echinoteuthis danae is a species of whip-lash squid. Known only from specimens of paralarvae, the species may be the juvenile form of Echinoteuthis atlantica.
Mastigoteuthis is a genus of whip-lash squid containing at least seven valid species. Some teuthologists consider Idioteuthis synonymous with this taxon.
Magnoteuthis is a genus of whip-lash squid containing at least three species. Some teuthologists consider Idioteuthis or Mastigoteuthis synonymous with this taxon, but it is genetically and morphologically distinct.
Echinoteuthis atlantica is a species of whip-lash squid from the family Mastigoteuthidae. It occurs in the eastern North and South Atlantic Ocean. This squid is red in colour and similar to Echinoteuthis famelica of the Pacific but differs in having a well developed protective membrane on the tentacular club which is absent on E. famelica. The presence on this membrane on Echinoteuthis glaukopis from the Indian Ocean suggests that this may be a synonym of E. atlantica, in which case glaukopis has priority.
Mastigoteuthis magna is a species of whip-lash squid, characterised by a lack of photophores. The skin is heavily pigmented a deep red by a numerous chromatophores.
Magnoteuthis microlucens is a species of squid; the most common species of Mastigoteuthis around the main Hawaiian Islands.
Illex coindetii, commonly known as the southern shortfin squid or broadtail shortfin squid, is a species of neritic squids in the family Ommastrephidae. They are found in the Mediterranean Sea and on both sides of the north Atlantic Ocean.
Teuthowenia megalops, sometimes known as the Atlantic cranch squid, is a species of glass squid from the subarctic and temperate waters of the northern Atlantic Ocean. They are moderately sized squid with a maximum mantle length of 40 cm (16 in). Their very large eyes are the source for the specific name megalops. Like other members of the genus Teuthowenia, they are easily recognizable by the presence of three bioluminescent organs (photophores) on their eyeballs.
Cephalopods exhibit various dermal structures on their mantles and other parts. These may take the form of conspicuous warts, cushions, papillae or scales, though in many species they are microscopic tubercles. The most elaborate forms are found among the oceanic squid of the order Teuthida.
Calliotropis talismani is a species of sea snail, a marine gastropod mollusk in the family Eucyclidae.
Neorossia caroli, the Carol bobtail squid, is a species of bobtail squid belonging to the family Sepiolidae.
Opisthoteuthis grimaldii is an octopus found near the Azores.
Le Talisman was a French Navy sloop built at Le Havre in 1862 which was used for geological, biological and hydrological exploration in the Atlantic Ocean and Mediterranean Sea at the end of the 19th century. It first served as a communications vessel ("aviso"), and was both sail and propeller driven.
