Physogaleus undetermined

Cicimurri, David J., Knight, James L. & Ebersole, Jun A., 2022, Early Oligocene (Rupelian) fishes (Chondrichthyes, Osteichthyes) from the Ashley Formation (Cooper Group) of South Carolina, USA, PaleoBios 39 (1), pp. 1-38 : 10

PHYSOGALEUS SP.

FIG. 5E

2009a Physogaleus sp. ;Cicimurri and Knight, p. 633–634, fig. 5G.

Referred specimens (n=2) —SC2007.36.21 ( Fig. 5E ), SC2007.36.22.

Remarks —The two specimens compare favorably to Physogaleus sp. reported by Cicimurri and Knight (2009a) from the Chattian Chandler Bridge Formation, and we consider the material to be conspecific. Physogaleus sp. differs from P.contortus by having a short cusp, mesial cutting edge that is smooth except for irregular basal crenulation, the distal cutting edge is smooth, and the few cusplets on the distal heel are unserrated. Incomplete preservation and limited sample size inhibit meaningful comparison to the several Oligocene species that have been identified from Europe ( Storms 1894, Baut and Génault 1999, Reinecke et al. 2001, Reinecke et al. 2005).

Figures

Figure 5. Selachian teeth from the Givhans Ferry Member, Ashley Formation (Rupelian), Dorchester County, South Carolina. A. Hemipristis cf. H. serra tooth, SC2007.36.7 in labial view. B. Carcharhinus gibbesi upper tooth, SC2007.36.14 in labial view. C. Carcharhinus gibbesi lower tooth, SC2007.36.15 in labial view. D. Physogaleus cf. P. contortus tooth, SC2007.36.19 in labial view. E. Physogaleus sp. tooth, SC2007.36.21 in labial view. F. Galeocerdo aduncus tooth, SC2007.36.17 in labial view. G. Sphyrnidae Morphotype 1 tooth, SC2007.36.26 in labial view. H. Sphyrnidae Morphotype 2 tooth, SC2007.36.24 in labial view. Scale bar=3 mm in E; 5 mm in A, C, D, F, G; 10 mm in B.