Isurus oxyrinchus (Agassiz, 1843)

Isurus oxyrinchus (Agassiz, 1843) View in CoL

(Fig. 72)

Referred material – 1 tooth ( V.61.915).

Description – The only tooth referred here is embedded in a piece of Leitha Limestone, in labial aspect (Fig. 72). The crown is slender and pointed, it slightly inclines distally, with a lingual curvature the very tip reclines labially. Both cutting edges are smooth, the mesial is convex, while the distal is nearly straight. The distal cutting edge does not reach the crown base. The root is bilobate and slightly asymmetrical, the lobes meet in an acute angle. Based on the preserved dental characteristics, specimen V.61.915 is referred as an anterior tooth, most likely from the lower dentition ( REINECKE et al. 2011, pl. 40 with all figurations; CAPPETTA 2012, fig. 203H, I).

Remarks – PURDY et al. (2001) noted that I. desori should be considered as junior synonym of I. oxyrinchus . BOR et al. (2012: 34) also suggest that there is no sufficient difference between Miocene teeth of the “ desori ” morphotype and teeth of extant I. oxyrinchus , which would support handling them under separate names. When treating the two species as synonyms, it can be concluded that I. oxyrinchus was widely distributed in the Central Paratethys during the Early and Middle Miocene ( RADWAŃSKI 1965; SCHULTZ 1971; HOLEC et al. 1995; KOCSIS 2007).