Mauroceras serratum (Vannozzi, 2017)

(Fig. 8F, G)

Meioceras serratum Vannozzi, 2017: 136, fig. 3F-N.

Mauroceras serratum – Vannozzi 2019b: 90.

TYPE MATERIAL. — Holotype. Philippines • sh; Bohol, Maribohoc Bay, depth 85-110 m; MNHN-IM-2000-33080.

Paratypes. Philippines • 1 sh juv; same data as for holotype; MNHN-IM-2000-33081 • 1 sh; Panglao, off Momo Beach, 85 m depth; MNHN-IM-2000-33082.

TYPE LOCALITY. — Philippines, Bohol Island, Maribohoc Bay, depth 85- 110 m.

MATERIAL EXAMINED. — Papua New Guinea • 2 sh (1 gs); New Ireland; KAVIENG 2014 Stn DW4465; 2°43’S, 150°36’E; 90-228 m depth; 3.IX.2014; MNHN • 1 sh; New Ireland; KAVIENG 2014 Stn DW4487; 2°25’S, 149°59’E; 130-153 m depth; 6.IX.2014; MNHN.

DISTRIBUTION. — Sulawesi, Philippines, PNG, Society, Marshall (Vannozzi 2017, 2019a, b, unpublished data).

DIAGNOSIS. — Shell of average size for the genus, colourless, transparent, glossy. Protoconch unknown.Teleoconch tubular, with strong, flat and wide rings. Early teleoconch conical, slightly twisted. Adult shell subcylindrical, tapering toward both the apex. Aperture simple, inclined, slantwise cutting the last two rings and ending with a reflected lip. Surface smooth with growth lines only. Septum on the cutting plane with a strong pointed mucro, rounded in ventral view. Operculum and soft parts unknown. Adult shell length c. 2.5 mm.

REMARKS

A few, very worn shells were found. Among them, a growth stage with juvenile part still attached was recovered (Fig. 8G).