Lamna

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Lamna
Temporal range: 65–0 Ma[1] Earliest Danian to Present
Lamna nasus noaa.jpg
Porbeagle (L. nasus)
Lamna ditropis.jpg
Salmon shark (L. ditropis)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Superorder: Selachimorpha
Order: Lamniformes
Family: Lamnidae
Genus: Lamna
Cuvier, 1816
Type species
Squalus cornubicus
Bloch and Schneider, 1801
Synonyms
  • Exoles Gistel, 1848
  • Lamia Risso, 1827
  • Selanonius Fleming, 1828

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[]

The two species of this genus can keep their blood temperature higher above that of the water surrounding them than other cartilaginous fish, with temperature differences recorded up to 15.6 °C.[2][3][4] Among fish, blood temperature regulation only occurs in large, fast species – bluefin tuna and swordfish are bony fish with similar abilities.

Species[]

  • † (Davis, 1888)
  • † (Davis, 1888)
  • Lamna ditropis C. L. Hubbs & , 1947 (salmon shark)
  • † (Davis, 1888)
  • † (Davis, 1888)
  • Lamna nasus (Bonnaterre, 1788) (porbeagle)
  • † (Agassiz, 1843)
  • † (Cragin, 1894)
  • † (Coquand, 1860)
  • † (Agassiz, 1843)

See also[]

  • List of prehistoric cartilaginous fish

References[]

  1. ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Chondrichthyes entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2011-09-30. Retrieved 2008-01-09.
  2. ^ Abstract for S. D. Anderson, K. J. Goldman: “Temperature Measurements from Salmon Sharks, Lamna ditropis, in Alaskan Waters”, Copeia, Vol. 2001, No. 3, 2001-08-06
  3. ^ Salmon shark, Lamna ditropis at marinebio.org
  4. ^ C. Larsen, H. Malte, R. E. Weber: “ATP-induced Reverse Temperature Effect in Isohemoglobins from the Endothermic Porbeagle Shark”, Journal of Biological Chemistry vol. 278, issue 33, 30741–30747, 2003-08-15
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