Description
Original diagnosis after Cicimurri & Knight, 2009 [4541]: A fossil species in which male teeth bear a tall, narrow cusp; anterior teeth are symmetrical to weakly asymmetrical; the cusp is conical to slightly laterally compressed and lacks a labial cutting edge. In contrast, male anterior teeth of Oligo−Miocene R. cecilae Steurbaut and Herman, 1978 can be strongly asymmetrical, and the cusp is very laterally compressed with a conspicuous labial cutting edge (Hovestadt and Hovestadt−Euler 1995; Reinecke et al. 2005, 2008; Haye et al. 2008). The labial crown margin of R. cecilae is also narrower and more labio−basally directed. Female teeth of R. mccollumi sp. nov. differ from R. cecilae in that the labial face of R. cecilae is flat to weakly concave, and the root is larger (Hovestadt and Hovestadt−Euler 1995; Reinecke et al. 2005, 2008; Haye et al. 2008). Although of similar size, the cusp of male teeth of Miocene Raja gentilli Joleaud, 1912 has a broader base, and the marginal area is smaller (Ward and Bonavia 2001) than male R. mccollumi sp. nov. Male teeth of R. mccollumi sp. nov. are smaller than Oligo−Miocene R. casieri Steurbaut and Herman, 1978 and Miocene R. olisiponensis (Jonet, 1968), and lack the conspicuous mesial and distal cutting edges seen on male teeth of the latter two taxa. Raja sp. from the German Chattian differ from male R. mccollumi sp. nov. in having a wider cusp (Reinecke et al. 2005: pl. 53: 1, 3; Haye et al. 2008: pl. 9: 4). Teeth of Raja sp. 1 described by Müller (1999: 56, text−fig. 18, nos. 7–10) may be conspecific with R. mccollumi sp. nov., but this determination must await our examination of specimens from the Ashley Marl.

Remarks
shark-references Species-ID=7767;
valid after Cicimurri et al. (2022) p. 14 [30628];

References