Caecum sp.

Walter, Angelo Vannozzi & Renda, Walter, 2024, Sampling the depth: New data on the Caecidae (Mollusca, Gastropoda) from northeastern Papua New Guinea, Zoosystema 46 (14), pp. 327-347 : 340

Caecum sp.

( Fig. 6L )

MATERIAL EXAMINED. — Papua New Guinea • 1 sh; New Ireland; KAVIENG 2014 Stn DW 4465; 2°43’S, 150°36’E; 90-228 m depth; 3.IX.2014; MNHN-IM-2022-2399 .

DESCRIPTION

Shell small for the genus, colourless, semitransparent. Tube subcylindrical, smooth, tapering toward the apex, slightly flaring toward the aperture. Sculpture none detected. Microsculpture of only fine growth lines. Aperture simple, contracted after a slight swelling. Septum on the cutting plane, dome shaped, asymmetric, without visible mucro. Protoconch, early stages, operculum and soft parts unknown. Length 1.25 mm.

REMARKS

This single specimen could not be classified according to any known species. Although it is rather fresh and likely adult, the lack of striking characters suggests us to wait for additional material in order to clarify its identity.

Figures

FIG. 6. — Caecum Fleming, 1813 species from deep-water stations from northeastern PNG: A-D, C. dakuwaqa Pizzini, Raines & Vannozzi, 2013 from Stn DW4470 (C, D: juvenile); E, C. dakuwaqa from Stn DW4463; F, C. cf. succineum from Stn DW4495; G, C. neocaledonicum de Folin, 1868 from Stn DW4470; H, C. neocaledonicum from Stn DW4464; I, C. frugi Vannozzi, 2019 from Stn DW4412; J, C. frugi juv. from Stn CP4418; K, C. neoguineanum Vannozzi, 2019 from Stn DW4495; L, C. sp. from Stn DW4465 MNHN-IM-2022-2399. Scale bars: A-H, K, L, 1 mm; I, J, 0.5 mm.