Hexanchus agassizi Cappetta, 1976

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 : 38-40

Hexanchus agassizi Cappetta, 1976

(Figs 14–17)

1976 Hexanchus agassizi n. sp. – CAPPETTA, pp. 553–554, pl. 1, figs 5, 7, 8.

1979 Hexanchus agassizi Cappetta, 1976 – WARD, pp. 114–115, pl. 2, figs 1–2.

2005 Hexanchus sp. – REINECKE et al., p. 9, pl. 3, figs 1a-b.

2012 Hexanchus agassizi Cappetta, 1976 – CAPPETTA, pp. 92–93, fig. 82.

2013 Hexanchus agassizi Cappetta, 1976 – SCHULTZ, pp. 23–24, pl. 4, figs 4a, b, 5.

2014 Hexanchus cf. agassizi Cappetta, 1976 – REINECKE et al., pp. 9–10, pls 3–4.

Referred material: 17 teeth (V.61.282., V.61.285A., V.61.770., VER 2016.3449., VER 2016.3456., VER 2016.3457., VER 2016.3458.).

Remarks: These teeth are similar to those of N. primigenius in general morphology, however, they are visually different in their much smaller size, and in having much more distal cusplets on the lower lateral teeth. The upper anteriors are higher than wide, with one slender, sinuous cusp without mesial or distal cusplets. The lower anterolateral-lateral files could be extremely wider than high, with mostly 7–9 distal cusplets reduced in height distally (Figs 15–17).

Most of the HNHM material of H. agassizi is in very poor condition, however, some of the specimens have very well-preserved crown. All specimens show close morphological affinities with the H. agassizi teeth figured by CAPPETTA (2012, p. 92, fig. 82).

Hexanchus agassizi was a widespread species from the Early Eocene to the Late Oligocene; its remains have been recovered from deep water sediments (see in CAPPETTA 2012; REINECKE et al. 2014).