Turritriton grundensis ( Hoernes et Auinger, 1884 )

Kovács, Zoltán & Vicián, Zoltán, 2017, Middle Miocene Tonnoidea and Ficoidea (Caenogastropoda) assemblages from Letkés (Hungary), Fragmenta Palaeontologica Hungarica 34, pp. 75-104 : 90

Turritriton grundensis ( Hoernes et Auinger, 1884)

(Figs 37–38)

1884 Triton (d. Simpulum ) Grundense – HOERNES & AUINGER, p. 177, pl. 21, fig. 16.

2009 Turritriton grundensis (Hoernes & Auinger) – LANDAU et al., p. 72, pl. 6, fig. 5 (cum syn.).

Material – 13 specimens (SL 17–22); HNHM: INV 2017.679 . (Figs 37–38) , 12 specimens in private collections.

Description – Gracile shell, high, step-like spire, spire whorls with two strong spiral cords at mid-whorl, sloping ramp, strongly shouldered last whorl. Ovate aperture, denticulate outer lip thickened by labral varix, long, narrow, straight siphonal canal, columella with two folds, thickened parietal callus. Spiral sculpture of well-developed primary and secondary cords, axial sculpture of broad, rounded ribs, growth lines and one varix on the last whorl.

Remarks – The species is typical of the Central Paratethys. It differs in morphology from the similar M. heptagonus in slender shell, sloping sutural ramp and finely reticulate surface. T. grundensis is a new record in Hungary.

Distribution – Badenian: CP ( Austria, Hungary, Poland).