Galeocerdo eaglesomei
Description
Galeocerdo eaglesomei (White, 1955)
EXAMINED MATERIAL. — Thirty isolated teeth, figured material includes FSAC Bouj-337, 338 and 339.
DESCRIPTION
The African Galeocerdo eaglesomei is unfrequent compared to the contemporaneous and worldwide species G. latidens Agassiz, 1843. However, G. eaglesomei differs from it by teeth with a higher crown, a longer and abrupt distal heel without distinct notch with main cusp, with more numerous and larger denticles and with a deeper basal medial concavity of the root deeper. Our teeth (Fig. 3 G-I), as those from the Lower Priabonian of SA, southwestern Morocco (Adnet et al. 2010), are relatively larger and display a much higher crown compared to the Lutetian specimens, which makes it possible to provisionally assign these to G. eaglesomei, to which the youngest specimens from Southwestern Morocco are likely affiliated.
REMARKS
Relatively scarce teeth of Galeocerdo cf. eaglesomei are quite similar in shape to G. eaglesomei from the late Lutetian of Nigeria (Andrews 1920), the Lutetian-Bartonian of GA (Strougo et al. 2007), the middle to late Eocene of Madagascar (Samonds et al. 2019) and to those recovered in MI, Egypt, where it is one of the most conspicuous elements of the uppermost Lutetian-lowermost Bartonian assemblage (Underwood et al. 2011).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Scientific name authorship
- White
- Kingdom
- Animalia
- Phylum
- Chordata
- Order
- Carcharhiniformes
- Family
- Carcharhinidae
- Genus
- Galeocerdo
- Species
- eaglesomei
- Taxon rank
- species
- Taxonomic concept label
- Galeocerdo eaglesomei (White, 1955) sec. Zouhri, Gingerich, Khalloufi, Bourdon, Adnet, Jouve, Elboudali, Amane, Rage & Tabuce, 2021
References
- WHITE E. I. 1955. - Notes on African Tertiary sharks. Colonial Geology and Mineral Resources 5: 319 - 325.
- ADNET S., CAPPETTA H. & TABUCE R. 2010. - A middle-late Eocene vertebrate fauna (marine fish and mammals) from southwestern Morocco preliminary report: age and palaeobiogeographical implications. Geological Magazine 147: 860 - 870. https: // doi. org / 10.1017 / s 0016756810000348
- ANDREWS C. W. 1920. - A description of new species of zeuglodont and of leathery turtle from the Eocene of Southern Nigeria. Proceedings of the Zoological Society of London 89: 309 - 319. https: // doi. org / 10.1111 / j. 1096 - 3642.1919. tb 02124
- STROUGO A., CAPPETTA H. & ELNAHAS S. 2007. - A remarkable Eocene ichthyofauna from the El Gedidia glauconitic sandstone, Bahariya oasis, Egypt, and its stratigraphic implications. MERC Ain Shams University, Earth Science Series 21: 81 - 98.
- SAMONDS K. E., ANDRIANAVALONA T. H., WALLETT L. A., ZALMOUT I. S. & WARD D. J. 2019. - A middle-late Eocene neoselachian assemblage from nearshore marine deposits, Mahajanga Basin, northwestern Madagascar. PLoS ONE 14 (2): e 0211789. https: // doi. org / 10.1371 / journal. pone. 0211789
- UNDERWOOD C. J., WARD D. J., KING C., ANTAR S. M., ZAL- MOUT I. S. & GINGERICH P. D. 2011. - Shark and ray faunas in the middle and late Eocene of the Fayum area, Egypt. Proceedings of the Geologists' Association 122: 47 - 66. https: // doi. org / 10.1016 / j. pgeola. 20