Carcharias

Vliet, Hendrik Jan Van, Schulp, Anne S., Abu El-Kheir, Gebely A. M. M., Paijmans, Theo M., Bosselaers, Mark & Underwood, Charles J., 2017, A new Oligocene site with terrestrial mammals and a selachian fauna from Minqar Tibaghbagh, the Western Desert of Egypt, Acta Palaeontologica Polonica 62 (3), pp. 509-525 : 520

Carcharias ? sp.

Fig. 12M .

Material.—Two partial teeth (CGM67195), from the BOS, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt. Dimensions: height 11–28 mm, width 10–13 mm.

Description.—Teeth slender and high with a rather straight, unornamented main cusp. The root is strongly bilobed. The shape of the root, and presence of lateral cusplets, is, due to some damage, unknown.

Remarks.— Carcharias sp. from the Daba’a Formation at Minqar Tibaghbagh has been described by Van Vliet and El-Kheir (2010) and Zalmout et al. (2012). Teeth are rare in the Eocene of Egypt ( Zalmout et al. 2012) and seem to be absent from the early Oligocene Jebel Qatrani Formation of the Fayum, Egypt.

The genus Carcharias is known from the Cenomanian to Recent of Europe, North America, Africa, and Far East in tropical and warm oceans ( Cappetta 2012).

Figures

Fig. 12. A–C. Carcharhiniformes and Myliobatiformes from the BOTM, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt; photographed and left in the field. A. Carcharhinus sp., incomplete upper tooth in lingual view. B, C. “Aetobatus” sp. B. Lower tooth in occlusal (B1) and basal (B2) views. C. Lower tooth in occlusal view. D–M. Carcharhiniformes and Lamniformes from the BOS, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt. D. Hemipristis cf. serra Agassiz, 1835 (1843) (CGM67195), upper lateral teeth in lingual (D1, D2, D4) and labial (D3) views. E. Carcharhinus cf. perseus Adnet,Antoine, Hassan Baqri, Crochet, Marivaux, Welcomme, and Métais, 2007 (CGM67194), upper antero-lateral teeth in lingual view. F. Carcharhinus sp. (CGM67195), upper teeth in lingual (F1, F4, F5, F6) and labial (F2, F3) views. G. Negaprion frequens (Dames, 1883) (CGM67191), lower teeth in lingual (G1, G3, G4) and lateral (G2, G5) views. H. Galeocerdo sp. (CGM67195) in lingual view. I–L. Otodus (Carcharocles) cf. sokolowi. I. CGM67195, upper tooth in lingual view. J. CGM69186 upper tooth in lingual (J1) and labial (J2) views. K. CGM69186, lower tooth in labial view. L. CGM69186, lower tooth in lingual (L1) and labial (L2) views. M. Carcharias? sp. (CGM67195), lower teeth in lateral (M1) and lingual (M2) views.