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
persistent identifier	https://treatment.plazi.org/id/038F87DD-FF88-FFE6-21C6-FDED3852C82B
treatment provided by	Felipe (2024-06-26 14:40:18, last updated 2024-06-26 14:40:21)
scientific name	Caecum neoguineanum Vannozzi, 2019
status

Treatment

Caecum neoguineanum Vannozzi, 2019 View in CoL

( Fig. 6K)

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. Paratypes. Papua New Guinea GoogleMaps • 1 sh; same data as for holotype; MNHN-IM-2000-34767 • 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 DW 4495; 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.