Galeocerdo
Genus of sharks
From Wikipedia, the free encyclopedia
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]
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| Galeocerdo Temporal range: | |
|---|---|
| |
| Galeocerdo cuvier | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Division: | Selachii |
| Order: | Carcharhiniformes |
| Family: | Galeocerdonidae |
| Genus: | Galeocerdo J. P. Müller & Henle, 1837 |
| Type species | |
| Squalus tigrinus | |
| Species | |
|
See text | |
Species
Species historically considered valid in the genus Galeocerdo include:[4]
- †Galeocerdo aduncus
- †Galeocerdo alabamensis
- †Galeocerdo clarkensis
- Galeocerdo cuvier
- †Galeocerdo denticulatus
- †Galeocerdo eaglesomi
- †Galeocerdo gibberulus
- †Galeocerdo latidens
- †Galeocerdo mayumbensis[5]
- †Galeocerdo minor
- †Galeocerdo mixtus
- †Galeocerdo productus