Heptranchias Karagalensis
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''Heptranchias'' is a genus of
shark Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachi ...
s in the family Hexanchidae.


Species

*'' Heptranchias perlo'' ( Bonnaterre, 1788) (sharpnose sevengill shark) *†'' Heptranchias ezoensis'' Applegate & Uyeno, 1968 *†'' Heptranchias howelli'' Reed, 1946 *†'' Heptranchias karagalensis'' 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 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...
period. Fossils are known from various localities in
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...
, North America,
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...
, New Zealand and Japan.Paleobiology Database
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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. Ranier 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.html" ;"title="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">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].]


See also

* List of prehistoric cartilaginous fish genera


References

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