Ocinebrina landaui, Kovács, 2018

Kovács, Zoltán, 2018, Muricidae (Neogastropoda) assemblages from the Middle Miocene of the Făget Basin (Romania) in the collection of the Hungarian Natural History Museum, Budapest, Fragmenta Palaeontologica Hungarica 35, pp. 111-142 : 129

Ocinebrina landaui n. sp.

(Figs 51–55)

2013 Coralliophila sp. – LANDAU et al., p. 163, pl. 24, fig. 12.

Holotype – M.60.6975, Hungarian Natural History Museum , Department of Palaeontology and Geology, SL 23 (Figs 51–53).

Paratypes – 1: M.60.6957D, SL 17 (Figs 54–55), 2: M. 60.6957E, SL 20, 3: M.60.6957F, SL 18.

Type strata and locality – Lower Badenian (Middle Miocene) Dej Formation, Coşteiu de Sus, Romania.

Derivation of name – In honour of Bernard M. Landau palaeontologist (Naturalis Biodiversity Center, Leiden, the Netherlands).

Diagnosis – Medium size shell, paucispiral protoconch, five slightly convex teleoconch whorls, sealed siphonal canal, broad, rounded axial ribs, numerous narrow, rounded and scabrous primary and secondary cords, short labral tooth.

Description – Robust shell of medium size, protoconch of about 1.5 smooth, rounded whorls. Teleoconch of five slightly convex whorls, suture shallow, undulating. Last whorl 76% of the total length. Aperture ovate, outer lip erect, seven denticles within, bearing a short labral tooth abapically. Anal notch moderately developed, columellar lip thin and smooth, siphonal canal straight, short, narrow and sealed, siphonal fasciole recurved, rounded, forming lateral wall of pseudoumbilicus. Axial sculpture of seven broad, rounded, slightly prosocline ribs on the penultimate and last whorls of the holotype. Spiral sculpture of numerous narrow, rounded, and slightly scabrous primary and secondary cords; a strong basal spiral band on the last whorl is formed by labral teeth.

Remarks – Based on morphology the new species is assigned to genus Ocinebrina . The labral tooth appears on some species of the genus, e.g. on O. imbricata known in the region. The latter, however, differs from O. landaui n. sp. by larger, fusiform shell, more convex teleoconch whorls, deeper and bordered anal notch, and finer axial ribs.

New collecting works prove the occurrence of the new species in the Pannonian Basin at two localities: Letkés and Bánd ( Hungary). The specimen from Turkey illustrated by LANDAU et al. (2013, pl. 24, fig. 22) as Coralliophila sp. is a closely allied form. It is characterized by identical size, labral tooth, and similar spiral and axial sculpture, but slightly differs by somewhat higher spire. Nevertheless, it is regarded herein as a Serravallian representative of O. landaui n. sp.

The online International Fossil Shell Museum (http://www.fossilshells.nl) represents a specimen as Ocenebra avitensis Cossmann et Peyrot from the Tortonian of Karaman. The morphology differs from that of avitensis (paratype MNHN. F. J05986 illustrated by the Muséum National d’Histoire Naturelle, Paris: https:// science.mnhn.fr/institution/mnhn/collection/f/item/j05986?lang=fr_FR) by less rounded whorls, broader base, and presence of labral tooth. On the other hand its size and morphology agree well with that of O. landaui n. sp., so the specimen is regarded as another representative of the new species in the Miocene of Turkey.