Lamna
{{Short description|Genus of sharks}}
{{Automatic taxobox
| fossil_range = {{Fossil range|65|0|ref={{cite journal|last=Sepkoski |first=Jack |title=A compendium of fossil marine animal genera (Chondrichthyes entry) |journal=Bulletins of American Paleontology |volume=363 |pages=1–560 |date=2002 |url=http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=575&rank=class |access-date=2008-01-09 |url-status=dead |archive-url=https://web.archive.org/web/20110930154826/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=575&rank=class |archive-date=2011-09-30 }}}}Earliest Danian to Present
| image = Lamna nasus noaa.jpg
| image_caption = Porbeagle (L. nasus)
| image2 = Salmon Shark, Oceano, CA 93445, USA imported from iNaturalist photo 142845394 (cropped).jpg
| image2_caption = Salmon shark (L. ditropis)
| taxon = Lamna
| authority = Cuvier, 1816
| type_species = Lamna nasus
| type_species_authority = Bonnaterre, 1788 porbeagle
| subdivision_ranks =
| subdivision =
| 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.[https://www.jstor.org/stable/1448302 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{{marinebio|id=379|name=Salmon shark, Lamna ditropis }}[http://www.jbc.org/cgi/reprint/278/33/30741.pdf 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 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
References
{{Reflist}}
{{Lamniformes}}
{{Taxonbar|from=Q137078}}
{{Authority control}}
Category:Danian first appearances