Carcharhiniformes

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File:Carcharhinus acronotus nefsc.jpg
Ground sharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it.

Carcharhiniformes (/ˌkɑːrkəˌrnɪˈfɔːrmz/; Script error: No such module "params".), commonly called ground sharks, are the largest order of sharks, with over 270 species. They include a number of common types, such as cat sharks, swellsharks, and hound sharks.

Members of this order are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits.

The families in the order Carcharhiniformes are expected to be revised; recent DNA studies show that some of the conventional groups are not monophyletic.

The oldest members of the order appeared during the Middle-Late Jurassic, which have teeth and body forms that are morphologically similar to living catsharks.[1] Carchariniformes first underwent major diversification during the Late Cretaceous, initially as mostly small-sized forms, before radiating into medium and large body sizes during the Cenozoic.[2][3]

Families

Eschmeyer's Catalog of Fishes classifies the Carcharhiniformes into two suborders and twelve families:[4]

Fossil genera

The following fossil genera of Carcharhiniformes are also known:[5]

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content.Stumpf, Sebastian; Scheer, Udo; Kriwet, Jürgen (2019-03-04). "A new genus and species of extinct ground shark, †Diprosopovenator hilperti, gen. et sp. nov. (Carcharhiniformes, †Pseudoscyliorhinidae, fam. nov.), from the Upper Cretaceous of Germany" (PDF). Journal of Vertebrate Paleontology. 39 (2) e1593185. Bibcode:2019JVPal..39E3185S. doi:10.1080/02724634.2019.1593185. ISSN 0272-4634. S2CID 155785248.
  2. ^ Page Module:Citation/CS1/styles.css has no content.Condamine, Fabien L.; Romieu, Jules; Guinot, Guillaume (2019-10-08). "Climate cooling and clade competition likely drove the decline of lamniform sharks". Proceedings of the National Academy of Sciences. 116 (41): 20584–20590. Bibcode:2019PNAS..11620584C. doi:10.1073/pnas.1902693116. ISSN 0027-8424. PMC 6789557. PMID 31548392.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Brée, Baptiste; Condamine, Fabien L.; Guinot, Guillaume (2022-12-19). "Combining palaeontological and neontological data shows a delayed diversification burst of carcharhiniform sharks likely mediated by environmental change". Scientific Reports. 12 (1): 21906. Bibcode:2022NatSR..1221906B. doi:10.1038/s41598-022-26010-7. ISSN 2045-2322. PMC 9763247. PMID 36535995.
  4. ^ Page Module:Citation/CS1/styles.css has no content."Eschmeyer's Catalog of Fishes Classification". Eschmeyer's Catalog of Fishes. California Academy of Sciences. Retrieved 24 October 2024.
  5. ^ Page Module:Citation/CS1/styles.css has no content."Extinct - valid species | Species | Shark-References". shark-references.com. Retrieved 2024-03-06.
  6. ^ Page Module:Citation/CS1/styles.css has no content.Tabuce, R., Adnet, S. (2020). "Diversity and renewal of tropical elasmobranchs around the Middle Eocene Climatic Optimum (MECO) in North Africa: New data from the lagoonal deposits of Djebel el Kébar, Central Tunisia". Palaeontologia Electronica. doi:10.26879/1085.{{cite journal}}: CS1 maint: multiple names: authors list (link)

Further reading

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