Cerithium connatum Montrouzier, 1862

Albano, Paolo G., Franco, Davide Di, Azzarone, Michele, J., Piet A., Bakker & Sabelli, Bruno, 2023, Review of the types of Indo-Pacific Triphoridae (Mollusca, Gastropoda) in the Muséum national d’Histoire naturelle, Paris, Zoosystema 45 (2), pp. 13-106 : 103

Cerithium connatum Montrouzier, 1862 ( Fig. 71 )

Cerithium connatum Souverbie & Montrouzier, 1862: 236 , pl. 9, fig. 4.

TYPE LOCALITY. — New Caledonia.

MATERIAL EXAMINED. — New Caledonia • MNHN-IM-2000-477; 3 specimens; from type locality.

ORIGINAL DESCRIPTION. — Test. sinistrorsa cylindrico-conica, subulata , gracilis , subvinosa; anfr. numerosis, dense connatis, planis, carinis 3-4 cingulatis; interstitiis punctis longitudinalibus, subvalidis, suboblique sculptis; apert. parva ; labro recto, acuto, canali brevi subrecurvo, margine sinistrali decussato. Long. 13-15, lat. 3-4 mill.

TRANSLATION OF THE LATIN TEXT. — Left-handed, cylindricalconical shell, subulate, slender, reddish; numerous whorls, densely arranged, flattened, with 3-4 spiral cords; interspaces are sculptured with longitudinal thick and slightly oblique dots; small aperture; straight lip, acute, short and slightly curved siphon, decussated at the left margin. Length 13-15, diameter 3-4 mm.

[Latin diagnosis followed by a discussion in French]

DIAGNOSIS. — Shell very elongated with flat sides. Illustrated specimens 19.2 and 22.8 mm high. Teleoconch of c. 21 and c. 22 whorls. Three spiral cords present, the second appearing between the fifth and eighth whorl. Spiral cords smooth with orthocline axial ribs in the interspaces. Base with two additional smooth spiral cords. Protoconch missing in the examined specimens.Teleoconch brown.

REMARKS. — Montrouzier wrote that the specimens he studied were in the museum of Bordeaux. The MNHN contains a lot with three specimens, all adults. Montrouzier wrote that he analysed indeed three specimens, but one clearly juvenile that was illustrated in his figure 4 on plate 9. Because of the explicit statement of Montrouzier and the fact that no juveniles are present in the lot in the MNHN, we do not consider these specimens belonging to the type series, although apparently belonging to Montrouzier’s collection.

Figures

FIG. 71. — Cerithium connatum Mountrouzier, 1862, New Caledonia:A, original figure in Mountrouzier (1862);B, C, G, specimen 1, MNHN-IM-2000-477: front (B), side (C), microsculpture (G); D-F, specimen 2, MNHN-IM-2000-477: front (D), side (E), back (F); H, original label. Scale bars: B-F, 4 mm; G, 0.5 mm.