Galeocerdo sp.

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 : 518-519

Galeocerdo sp.

Fig. 12H .

Material.—One damaged tooth (CGM67195) from the BOS, early Oligocene, Minqar Tibaghbagh, Qattara Depression, Egypt. Dimensions: height 12 mm, width 12 mm.

Description.—The single tooth is very incomplete and specifically indeterminable. The crown is low and has a strongly distally inclined cusp. The cutting edges of the cusp are finely, but clearly serrated. There is a well-developed notch at the distal base of the crown with a small part of the distal heel preserved. This has coarser serrations than the main cusp. The root is high and linguolabially compressed.

Remarks.— Galeocerdo spp. from the Daba’a Formation at Minqar Tibaghbagh has been described by Van Vliet and El-Kheir (2010) and Zalmout et al. (2012).

The genus Galeocerdo is known from the lower Eocene, Ypresian to Recent; Africa, Europe, North and South America, and Asia in tropical and temperate 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.