''Lamna'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

mackerel sharks The Lamniformes (, from Greek ''lamna'' "fish of prey") are an order of sharks commonly known as mackerel sharks (which may also refer specifically to the family Lamnidae). It includes some of the most familiar species of sharks, such as the grea ...

in the family

Lamnidae The Lamnidae are the family of mackerel sharks known as white sharks. They are large, fast-swimming predatory fish found in oceans worldwide, though they prefer environments with colder water. The name of the family is formed from the Greek word ...

, containing two extant species: the

porbeagle The porbeagle or porbeagle shark (''Lamna nasus'') is a species of mackerel shark in the family Lamnidae, distributed widely in the cold and temperate marine waters of the North Atlantic and Southern Hemisphere. In the North Pacific, its ecolo ...

(''L. nasus'') of the

North Atlantic The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for ...

and Southern Hemisphere, and the

salmon shark The salmon shark (''Lamna ditropis'') is a species of mackerel shark found in the northern Pacific ocean. Similar to other mackerel sharks, salmon sharks have a thunniform body type. As an apex predator, the salmon shark feeds on salmon, squid, s ...

(''L. ditropis'') of the

North Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the contine ...

Endothermy

The two species of this genus can keep their blood temperature higher above that of the water surrounding them than other

cartilaginous fish Chondrichthyes (; ) is a class of jawed fish that contains the cartilaginous fish or chondrichthyans, which all have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or ''bony fish'', which have skeleto ...

, with temperature differences recorded up to 15.6 °C.C. Larsen, H. Malte, R. E. Weber: “ATP-induced Reverse Temperature Effect in Isohemoglobins from the Endothermic Porbeagle Shark”
''

Journal of Biological Chemistry The ''Journal of Biological Chemistry'' (''JBC'') is a weekly peer-reviewed scientific journal that was established in 1905., jbc.org Since 1925, it is published by the American Society for Biochemistry and Molecular Biology. It covers research i ...

'' vol. 278, issue 33, 30741–30747, 2003-08-15 Among fish, blood temperature regulation only occurs in large, fast species –

bluefin tuna Bluefin tuna is a common name used to refer to several species of tuna of the genus ''Thunnus''. {{Animal common name Commercial fish Thunnus Fish common names ...

and

swordfish The swordfish (''Xiphias gladius''), also known as the broadbill in some countries, are large, highly migratory predatory fish characterized by a long, flat, pointed bill. They are the sole member of the Family (biology), family Xiphiidae. They ...

are

bony fish Osteichthyes ( ; ), also known as osteichthyans or commonly referred to as the bony fish, is a Biodiversity, diverse clade of vertebrate animals that have endoskeletons primarily composed of bone tissue. They can be contrasted with the Chondricht ...

with similar abilities.

Species

* †''

Lamna attenuata ''Lamna'' is a genus of mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (''L. nasus'') of the North Atlantic and Southern Hemisphere, and the salmon shark (''L. ditropis'') of the North Pacific. Endothermy ...

'' (Davis, 1888) * †'' Lamna carinata'' (Davis, 1888) * ''

Lamna ditropis The salmon shark (''Lamna ditropis'') is a species of mackerel shark found in the northern Pacific ocean. Similar to other mackerel sharks, salmon sharks have a thunniform body type. As an apex predator, the salmon shark feeds on salmon, squid, s ...

'' C. L. Hubbs & Follett, 1947 (salmon shark) * †''

Lamna hectori ''Lamna'' is a genus of mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (''L. nasus'') of the North Atlantic and Southern Hemisphere, and the salmon shark (''L. ditropis'') of the North Pacific. Endothermy ...

'' (Davis, 1888) * †''

Lamna marginalis ''Lamna'' is a genus of Lamniformes, mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (''L. nasus'') of the North Atlantic and Southern Hemisphere, and the salmon shark (''L. ditropis'') of the North Pacific. ...

'' (Davis, 1888) * ''

Lamna nasus The porbeagle or porbeagle shark (''Lamna nasus'') is a species of mackerel shark in the family Lamnidae, distributed widely in the cold and temperate marine waters of the North Atlantic and Southern Hemisphere. In the North Pacific, its ecolo ...

'' ( Bonnaterre, 1788) (porbeagle) * †''

Lamna quinquelateralis ''Lamna'' is a genus of mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (''L. nasus'') of the North Atlantic and Southern Hemisphere, and the salmon shark (''L. ditropis'') of the North Pacific. Endothermy T ...

'' (Cragin, 1894) * †''

Lamna trigeri ''Lamna'' is a genus of Lamniformes, mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (''L. nasus'') of the North Atlantic and Southern Hemisphere, and the salmon shark (''L. ditropis'') of the North Pacific. ...

'' (Coquand, 1860) * †''

Lamna trigonata ''Lamna'' is a genus of mackerel sharks in the family Lamnidae, containing two extant species: the porbeagle (''L. nasus'') of the North Atlantic and Southern Hemisphere, and the salmon shark (''L. ditropis'') of the North Pacific. Endothermy T ...

'' (Agassiz, 1843)

References

{{Authority control Danian first appearances Taxa named by Georges Cuvier Shark genera Extant Danian first appearances

Endothermy

Species

See also

References