Monoplex sp.

Kovács, Zoltán & Vicián, Zoltán, 2017, Middle Miocene Tonnoidea and Ficoidea (Caenogastropoda) assemblages from Letkés (Hungary), Fragmenta Palaeontologica Hungarica 34, pp. 75-104 : 88-90

Monoplex sp.

(Figs 35–36)

Material – One adult specimen (SL 30.5); in private collection.

Description – Squat, subovate shell, moderately elevated, conical spire, protoconch missing, four, convex, shouldered teleoconch whorls with concave sutural ramp, convex last whorl. Ovate aperture, outer lip thickened by labral varix, six denticles within, long, narrow, slightly curved siphonal canal, plicate columella, thickened parietal callus. Spiral sculpture of four narrow cords on the ramp and six cords on the penultimate whorl, and eight primary cords (five adapical divided by median grooves) on the last whorl, secondary cords in interspaces, axial sculpture of broad, rounded ribs (7 on the last whorl), fine growth lines and one varix on the last whorl.

Remarks – The morphology differs from that of both M. heptagonus and M. subcorrugatus in broader and conical spire, narrower aperture and much finer spiral cords. The specimen probably represents a new species.

Distribution – Badenian: CP (Letkés, Hungary).