Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Classis: Chondrichthyes
Subclassis: Elasmobranchii
Infraclassis: Euselachii
Division/Cohort: Neoselachii
Subdivision/Subcohort: Selachimorpha
Superordo: Galeomorphii
Ordo: Lamniformes
Familia: Lamnidae
Genus: Lamna
Species: Lamna ditropis - Lamna nasus
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
†Lamna attenuata (Davis, 1888)
†Lamna carinata (Davis, 1888)
Lamna ditropis C. L. Hubbs & Follett, 1947 (salmon shark)
†Lamna hectori (Davis, 1888)
†Lamna marginalis (Davis, 1888)
Lamna nasus (Bonnaterre, 1788) (porbeagle)
†Lamna quinquelateralis (Cragin, 1894)
†Lamna trigeri (Coquand, 1860)
†Lamna trigonata (Agassiz, 1843)
See also
List of prehistoric cartilaginous fish
References
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.
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
Salmon shark, Lamna ditropis at marinebio.org
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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