Carcharias sp. 1

Szabó, Márton & Kocsis, László, 2016, A preliminary report on the Early Oligocene (Rupelian, Kiscellian) selachians from the Kiscell Formation (Buda Mts, Hungary), with the re-discovery of Wilhelm Weiler’s shark teeth, Fragmenta Palaeontologica Hungarica 33, pp. 31-64 : 43-44

Carcharias sp. 1

( Figs 28–30 )

Referred material:7teeth(VER2016.3411., VER2016.3425.,VER2016.3441., VER 2016.3442.).

Remarks: The lingual face of the main crown bears fine apicobasal striation, which disappears towards the tip (this striation is not as visible and well-developed as that of members of the family Mitsukurinidae ). The labial face is smooth, without any ornamentation.

In having striated lingual face, these teeth show affinities to the species Carcharias acutissima (Agassiz, 1843) . This species is known from the Eocene and became abundant in the Miocene ( CAPPETTA 2012). All the Kiscell Clay specimens referred here bear the lingual striation of the main crown, however, only one (VER 2016.3441.; Figs 28–30 ) has lateral cusplets preserved. This cusplet is not so bent to the main crown, as it is typical for the species. It is weakly bent labiolingually, it has weak, flattened edges to the tip. This difference could have been caused by intraspecific variability, due to the strong heterodonty, but for a certain taxonomic determination more specimens are needed.

It is worth mentioning that WEILER (1933, p. 23 and 1938, p. 8) reported the species Carcharias acutissima as Odontaspis acutissima , therefore its presence seems to be supported.

Figures

Figs 28–30. Carcharias sp. 1 anterior tooth (VER 2016.3441.). – 28. Lingual view. – 29. Profile view. – 30. Labial view. – Figs 31–33. Carcharias sp. 2 anterior tooth (V.61.866.). – 31. Lingual view. – 32. Profile view. – 33. Labial view. Scale bars: 10 mm