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: Carcharhiniformes
Familia: Hemigaleidae
Genus: Hemipristis
Hemipristis elongata
Hemipristis (from Greek: ἡμι hēmi, 'half' and Greek: πρίστης prístēs 'saw')[2] is a genus of weasel sharks, family Hemigaleidae. It contains one extant species, the snaggletooth shark (H. elongata) and several extinct species.
Hemipristis has two distinct types of teeth in each section of its jaw. The ones on the upper jaw act as knives, cutting through the flesh of the prey, while the pointed ones on the bottom act as forks, spearing the prey and holding it down. Because this shark was poorly studied in the past and its top and bottom jaw teeth differ to such a great degree, its top and lower jaw teeth were assigned to a separate genus in the past.
Species
Hemipristis elongata (Klunzinger, 1871)
†Hemipristis curvatus
†Hemipristis serra - An extinct species from the Oligocene-Miocene of Florida, South Carolina, and other areas on the Atlantic coast.[3]
See also
List of prehistoric cartilaginous fish
References
Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Chondrichthyes entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2008-01-09.
Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 76. Retrieved 30 December 2021.
Portell, R.W.; Hubbell, G.; Donovan, S.K.; Green, J.L.; Harper, D.A.T.; Pickerill, R. (2008). "Miocene sharks in the Kendeace and Grand Bay formations of Carriacou, The Grenadines, Lesser Antilles". Caribbean Journal of Science. 44 (3): 279–286. doi:10.18475/cjos.v44i3.a2. S2CID 87154947.
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