Caecum neoguineanum Vannozzi, 2019

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

publication ID	https://doi.org/10.5252/zoosystema2024v46a14
publication LSID	lsid:zoobank.org:pub:23D972D0-F573-429C-816B-F42AFF02D0B1
DOI	https://doi.org/10.5281/zenodo.12548754
persistent identifier	https://treatment.plazi.org/id/038F87DD-FF88-FFE6-21C6-FDED3852C82B
treatment provided by	Felipe (2024-06-26 14:40:18, last updated 2024-11-26 05:36:33)
scientific name	Caecum neoguineanum Vannozzi, 2019
status

Treatment

Caecum neoguineanum Vannozzi, 2019 View in CoL

( Fig. 6K View FIG )

Caecum neoguineanum Vannozzi, 2019b: 87 View in CoL , fig. 5A-J.

TYPE MATERIAL. — Holotype. Papua New Guinea • sh; S Sek Island ; 5°07.0’S, 145°49.4’E, 17 m depth; MNHN-IM-2000-34766 . GoogleMaps Paratypes. Papua New Guinea • 1 sh; same data as for holotype; MNHN-IM-2000-34767 GoogleMaps • 1 sh; W Kranket Island , dredged; 5°11.7’S, 145°48.8’E; 16-28 m depth; MNHN-IM-2000-34768 GoogleMaps .

TYPE LOCALITY. — Pacific Ocean, Papua New Guinea, South of Sek Island, 5°07.0’S, 145°49.4’E, 17 m depth.

MATERIAL EXAMINED. — Papua New Guinea • 1 sh; New Ireland; 2°24’S, 49°55’E; 272-274 m depth; 6.IX.2014; KAVIENG 2014 Stn DW4495; MNHN GoogleMaps .

DISTRIBUTION. — Known from northeastern PNG ( Vannozzi 2019b).

DIAGNOSIS. — Shell of average size for the genus, whitish, slightly glossy. Protoconch unknown. Teleoconch tubular, slightly arched, smooth. Early teleoconch subcylindrical, slightly arched, tapering toward the apex. Adult shell cylindrical, slender, slightly arched. Tube slightly inflated before the aperture, which is simple, slightly contracted and inclined, lip not reflected, sharp. No microsculpture. Septum low dome shaped without mucro, recessed below the cutting plane. Operculum and soft parts unknown. Adult shell length c. 2 mm.

REMARKS

A single worn specimen was found in the examined material, well fitting the holotype. The most similar species is C. japonicum due to the low dome-shaped septum without mucro and contracted aperture. However, C. neoguineanum is slenderer and more cylindrical and shows a characteristic inflated aperture.

References

VANNOZZI A. 2019 b. - The family Caecidae (Mollusca: Gastropoda) from northern Papua-New Guinea. Bollettino Malacologico 55 (1): 72 - 104.

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.