| Galeocerdo Temporal range:
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| Galeocerdo cuvier | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Carcharhiniformes |
| Family: | Galeocerdonidae |
| Genus: | Galeocerdo J. P. Müller & Henle, 1837 |
| Type species | |
| Squalus tigrinus | |
| Species | |
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See text | |
Galeocerdo is a genus of ground shark. Only a single species, G. cuvier, the tiger shark, is extant.[1] The earliest fossils date back to the early Eocene epoch, (Ypresian), around 56–47.8 Million years ago.[2] While historically considered a member of the requiem shark family Carcharhinidae, it is currently considered to be the only member of the family Galeocerdonidae.[3] While this genus was historically considered diverse, including 21 extinct species, morphometric analysis conducted in 2021 suggested that the diversity of the genus included only 5 extinct species (including the Eocene †G. clarkensis and †G. eaglesomei, Oligocene-late Miocene †G. aduncus, Miocene †G. mayumbensis, and Pliocene †G. capellinii) much lower than previously assumed. The oldest fossils of the extant G. cuvier date to the middle Miocene.[2]
- ^ "iNaturalist.org".
- ^ a b Türtscher, Julia; López-Romero, Faviel A.; Jambura, Patrick L.; Kindlimann, René; Ward, David J.; Kriwet, Jürgen (November 2021). "Evolution, diversity, and disparity of the tiger shark lineage Galeocerdo in deep time". Paleobiology. 47 (4): 574–590. doi:10.1017/pab.2021.6. ISSN 0094-8373. PMC 7612061. PMID 34866693.
- ^ Pollerspöck, J.; Straube, N. Bibliography Database of Living/Fossil Sharks, Rays and Chimaeras (Chondrichtyes: Elasmobranchii, Holocephali)—List of Valid Extant Species; List of Described Extant Species; Statistic, World Wide Web Electronic Publication, Version 10/2021; ISSN: 2195-6499. Available online: www.shark-references.com (accessed on 23 November 2021).