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Title: Lamna  
Author: World Heritage Encyclopedia
Language: English
Subject: Lamnidae, Porbeagle, Lamniformes, Danian first appearances, Salmon shark
Publisher: World Heritage Encyclopedia


Temporal range: 65–0Ma[1]
Danian to Present
Porbeagle (L. nasus)
Salmon shark (L. ditropis)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Superorder: Selachimorpha
Order: Lamniformes
Family: Lamnidae
Genus: Lamna
Cuvier, 1816
Type species
Squalus cornubicus
Bloch and Schneider, 1801
  • 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 1
  • Species 2
  • See also 3
  • References 4


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.


See also


  1. ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Chondrichthyes entry)". Bulletins of American Paleontology 364: 560. 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. ^ Lamna ditropisSalmon shark, MarineBio"
  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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