| 词条 | Lamna |
| 释义 |
| fossil_range = {{Fossil range|65|0|ref=[1]}}Danian to Present | image = Lamna nasus noaa.jpg | image_caption = Porbeagle (L. nasus) | image2 = Lamna ditropis.jpg | image2_caption = Salmon shark (L. ditropis) | taxon = Lamna | authority = Cuvier, 1816 | type_species = Squalus cornubicus | type_species_authority = Bloch and Schneider, 1801 | synonyms =
}} 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. EndothermyThe 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
See also
References1. ^{{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 |accessdate=2008-01-09 |deadurl=yes |archiveurl=https://web.archive.org/web/20110930154826/http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=575&rank=class |archivedate=2011-09-30 |df= }} {{Lamniformes}}{{Taxonbar|from=Q137078}}2. ^[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 3. ^{{marinebio|id=379|name=Salmon shark, Lamna ditropis }} 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 5 : Lamna|Danian first appearances|Extant Paleocene first appearances|Taxa named by Georges Cuvier|Shark genera |
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