Cetorhinus Blainville, 1816

Cicimurri, David J. & Knight, James L., 2009, Late Oligocene sharks and rays from the Chandler Bridge Formation, Dorchester County, South Carolina, USA, Acta Palaeontologica Polonica 54 (4), pp. 627-647 : 631

Genus Cetorhinus Blainville, 1816

Type species: Squalus maximus Gunner, 1765 , Recent , Portugal .

? Cetorhinus parvus Leriche, 1908

Fig. 3D .

Referred specimens.— BCGM 9049 and 9050, SC 2009.18.4.

Comments.—Each scale consists of a circular to teardropshaped, cuspidate, highly ornamented crown sitting atop a dorso−ventrally flattened base that has a circular outline and convex ventral surface. Our material is identical to fossils identified as type E denticles by Cappetta (1970) and Squatina subserrata scales by Case (1980). Van den Bosch (1984: figs. 50–66) tentatively assigned the scales to Cetorhinidae because the morphology is apparently unique to the family. Reinecke et al. (2005) identified their scales as? Cetorhinus parvus . Cetorhinus maximus (Gunnerus, 1765) , the only living species, is widely distributed ( Compagno et al. 2005), and our fossils may be conspecific with the fossils reported by van den Bosch (1984) and Reinecke et al. (2005).

Stratigraphic and geographic range.—Oligocene (Rupelian and Chattian), Belgium, Germany, USA (South Carolina).

Figures

Fig. 3. Shark remains from Summerville, upper Chattian. A. Squatina cf. S. angeloides van Beneden, 1873, BCGM 9043, antero−lateral tooth, labial view. B. Nebrius cf. N. serra (Leidy, 1877), SC2009.18.1, antero−lateral tooth, labial view. C. Rhincodon cf. R. typus (Smith, 1828), BCGM 9045, anterior tooth, labial (C1), lateral (C2), and basal (C3) view. D.?Cetorhinus parvus (Leriche, 1908), BCGM 9050, dermal scale, dorsal view, anterior at bottom.