Mauroceras rhinoceros ( Pizzini, Raines & Vannozzi, 2013 )

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 : 344

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.12554903
persistent identifier	https://treatment.plazi.org/id/038F87DD-FF94-FFFA-2063-FF23399DCB4B
treatment provided by	Felipe (2024-06-26 14:40:18, last updated 2024-11-26 05:36:33)
scientific name	Mauroceras rhinoceros ( Pizzini, Raines & Vannozzi, 2013 )
status

Treatment

Mauroceras rhinoceros ( Pizzini, Raines & Vannozzi, 2013) View in CoL

( Fig. 8D, E View FIG )

Meioceras rhinoceros Pizzini et al. 2013: 42 View in CoL , fig. 16A-C.

Mauroceras rhinoceros View in CoL – Vannozzi 2019b: 91, and synonymy therein.

TYPE MATERIAL. — Holotype. Loyalty • sh; Lifou , Baie de Santal , NE of the Bay, level of Cila, 25-30 m depth; MNHN-IM-2000-24880 . Paratypes. Loyalty • 1 sh; same data as for holotype; MNHN-IM-2000-24881 .

Papua New Guinea • 2 sh; New Britain, Rabaul , 4°12’S, 152°11’E; AMS C044117-n. 003958B GoogleMaps .

Indonesia • 1 sh; N Sulawesi, off Menado , S side of Bunaken and Siladen ; 1°36.2’N, 124°46’E; 5-20 m depth; LACM 88-55 About LACM GoogleMaps • 1 sh; Gulf of Tomini , Kep.Togian, Batudaka Is. , 12-17 m depth; coll. IK .

TYPE LOCALITY. — Pacific Ocean, Loyalty, Lifou, Baie de Santal, NE of the Bay, level of Cila, 25-30 m depth.

MATERIAL EXAMINED. — Papua New Guinea • 1 sh; New Ireland; 2°45’S, 150°37’E; 163-358 m depth; 3.IX.2014; KAVIENG 2014 Stn DW4470; MNHN GoogleMaps .

DISTRIBUTION. — Indonesia, North Sulawesi, Philippines, northeastern PNG ( Pizzini et al. 2013; Vannozzi 2017, 2019a, b, unpublished data).

DIAGNOSIS. — Shell very large for the genus, whitish, glossy. Protoconch planorbid, smooth, of 1.75 whorls, ending with thickened sinusigera lip.Teleoconch almost straight, tubular. Early teleoconch conical, rapidly growing, with hardly visible annular sculpture. Adult shell subcylindrical, tapering toward both the apex and the aperture. Maximum width located adapically at about ¼ of the length. Septum recessed below the cutting plane, with a strong hook-like mucro projecting well beyond the cutting plane. Aperture oblique, simple with reflected lip. Operculum and soft parts unknown. Adult shell length c. 6 mm, protoconch size 280 µm.

REMARKS

This huge species can be considered as the giant of the family. Due to its peculiar characters and the large size, it is easily identified.

References

PIZZINI M., RAINES B. & VANNOZZI A. 2013. - The family Caecidae in the South-West Pacific (Gastropoda: Rissooidea). Bollettino Malacologico 49 (suppl. 10): 1 - 78. https: // www. biodiversitylibrary. org / part / 291987

VANNOZZI A. 2017. - The family Caecidae (Mollusca: Gastropoda) from the Central Philippines. Bollettino Malacologico 53 (2): 121 - 149. https: // www. biodiversitylibrary. org / item / 278548

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

VANNOZZI A. 2019 a. - Mauroceras, a new genus for Indo-West Pacific species hitherto assigned to Meioceras (Gastropoda: Caecidae). Bollettino Malacologico 55 (1): 55 - 61.

Figures

FIG. 8. — Mauroceras Vannozzi, 2019 species from deep-water stations from northeastern PNG: A, B, M. kajiyamai (Habe, 1963) from Stn CP3680 (B, juvenile); C, M. kajiyamai from Stn DW4465; D, E, M. rhinoceros (Pizzini, Raines & Vannozzi,2013) from Stn DW4470; F, G, M. serratum (Vannozzi, 2017) from Stn DW4465 (G, growth stage). Scale bar: 1 mm.