''Heptranchias'' is a genus of

shark Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the ...

s in the family Hexanchidae.

Species

*''

Heptranchias perlo The sharpnose sevengill shark (''Heptranchias perlo''), also known as one-finned shark, perlon shark, sevengill cow shark, sharpsnouted sevengill or slender sevengill, is a species of shark in the family Hexanchidae, and the only living species ...

'' ( Bonnaterre, 1788) (sharpnose sevengill shark) *†''

Heptranchias ezoensis ''Heptranchias'' is a genus of sharks in the family Hexanchidae. Species *''Heptranchias perlo'' ( Bonnaterre, 1788) (sharpnose sevengill shark) *†'' Heptranchias ezoensis'' Applegate & Uyeno, 1968 *†'' Heptranchias howelli'' Reed, 1946 ...

'' Applegate & Uyeno, 1968 *†''

Heptranchias howelli ''Heptranchias howelli'', the sevengill shark, is a nektonic carnivore in the genus ''Heptranchias''. It is an extinct species that ranged from 37.2 to 20.43 Ma.Heptranchias karagalensis ''Heptranchias'' is a genus of sharks in the family Hexanchidae. Species *''Heptranchias perlo'' ( Bonnaterre, 1788) (sharpnose sevengill shark) *†''Heptranchias ezoensis'' Applegate & Uyeno, 1968 *†'' Heptranchias howelli'' Reed, 1946 * ...

'' Kozlov in Zhelezko & Kozlov, 1999 *†''

Heptranchias tenuidens ''Heptranchias'' is a genus of sharks in the family Hexanchidae. Species *''Heptranchias perlo'' ( Bonnaterre, 1788) (sharpnose sevengill shark) *†'' Heptranchias ezoensis'' Applegate & Uyeno, 1968 *†'' Heptranchias howelli'' Reed, 1946 ...

'' Leriche, 1938

Fossil record

Fossils of ''Heptranchias'' are found in marine strata from the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

period. Fossils are known from various localities in

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

, New Zealand and

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

.Paleobiology Database
/ref> Heptranchias perlo lower teeth

Bibliography

*Bonnaterre, J.P. 1788, Tableau encyclopédique et méthodique des trois règnes de la nature... Ichthyologie. Paris. Tableau encyclopédique et méthodique des trois règnes de la nature... Ichthyologie.: i-lvi + 1-215, Pls. A-B + 1-100. *Compagno, L.J.V. 1. Hexanchiformes to Lamniformes // Sharks of the world. An annotated and illustrated catalogue of sharks species known to date. — FAO Fish Synop., 1984. — Vol. 4. — P. 14. — 249 p. *Heptranchias. FishBase. Ed. Rainer Froese and Daniel Pauly. February 2009 version. N.p.: FishBase, 2009. *Rafinesque, C.S. 1810, Caratteri di alcuni nuovi generi e nuove specie di animali e piante della sicilia, con varie osservazioni sopra i medisimi. (Part 1 involves fishes, pp. -iv3-69 0 blank Part 2 with slightly different title, pp. ia-iva + 71-105 06 blank. Caratteri di alcuni nuovi generi e nuove specie di animali e piante della sicilia, con varie osservazioni sopra i medisimi.. Pls. 1-20. ates to 1810 (see Holthius & Boeseman 1977 [ref. 6877 Wheeler 1988 [ref. 6878">ef._6877.html" ;"title="ates to 1810 (see Holthius & Boeseman 1977 [ref. 6877">ates to 1810 (see Holthius & Boeseman 1977 [ref. 6877 Wheeler 1988 [ref. 6878. Also see Boewe 1982 [ref. 6030].]

References

{{Taxonbar, from=Q2561876 Heptranchias, Shark genera Taxa named by Constantine Samuel Rafinesque Extant Cretaceous first appearances Fish genera with one living species

Species

Fossil record

Bibliography

See also

References