Galeocerdo

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]

Galeocerdo
Temporal range:
Galeocerdo cuvier
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Carcharhiniformes
Family: Galeocerdonidae
Genus: Galeocerdo
J. P. Müller & Henle, 1837
Type species
Galeocerdo cuvier
Species

See text

Species

Species historically considered valid in the genus Galeocerdo include:[4]

References
  1. "iNaturalist.org".
  2. 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.
  3. 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).
  4. "Fossilworks: Galeocerdo". fossilworks.org. Retrieved 17 December 2021.
  5. "Shark Teeth - Galeocerdo mayumbensis Fossils". www.blackriverfossils.org. Archived from the original on 2016-05-29. Retrieved 2016-04-01.
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