Mauroceras kajiyamai ( Habe, 1963 )

Vannozzi, Angelo, 2023, The Caecidae from BIOMAGLO Expedition in the Mayotte-Glorieuses area (Mollusca, Gastropoda), Zoosystema 45 (12), pp. 421-434 : 431

publication ID	https://doi.org/10.5252/zoosystema2023v45a12
publication LSID	lsid:zoobank.org:pub:5EB87A24-068B-40F3-B76B-79E4F48C478A
DOI	https://doi.org/10.5281/zenodo.8183534
persistent identifier	https://treatment.plazi.org/id/03A4967B-FFDD-FFD7-B2BA-FBEBF50196DF
treatment provided by	Felipe (2023-07-24 11:53:16, last updated 2024-11-26 22:09:11)
scientific name	Mauroceras kajiyamai ( Habe, 1963 )
status

Treatment

Mauroceras kajiyamai ( Habe, 1963) View in CoL

( Fig. 3M View FIG )

Meioceras kajiyamai Habe, 1963: 231 View in CoL , fig. 5. — Vannozzi 2019a: 91 (and synonymy therein).

† Parastrophia christinae Selli, 1974: 305 View in CoL , pl. 16, figs 5, 6.

† Meioceras mateldae Selli, 1974: 306 View in CoL , pl. 16, figs 8, 9.

TYPE MATERIAL. — Holotype. Japan • dd; Amami-Oshima , Ankyaba, Kakeroma Jima; NMNS figured by Pizzini et al. (2013: fig. 15 M).

TYPE LOCALITY. — Pacific Ocean, Japan, Amami-Oshima, Ankyaba, Kakeroma Jima.

MATERIAL EXAMINED. — Mayotte • 1 dd; Mozambique Channel , W Mayotte, BIOMAGLO Stn DW4847; 12°41’S, 44°57’E; 738- 763 m depth; 30.I.2017; MNHN GoogleMaps .

DISTRIBUTION. — Indo-West Pacific, from the eastern coast of Africa to Maldives, Papua New Guinea, Philippines, Japan, New Caledonia ( Habe 1963; Hasegawa 2000; Pizzini et al. 2013; Vannozzi 2017; 2019a; 2019b; unpublished data).

DIAGNOSIS. — Shell of average size for the genus, semitransparent whitish, glossy. Tube subcylindrical, tapering toward both the apex and the aperture. Maximum width located at about one quarter of the length close to the aperture. Sculpture of fine, regular rings. Septum on the cutting plane, with a strong mucro, showing a straight dorsal side and a sloping, slightly convex ventral side. Young stage showing a rapid growth and a cow-horn shape. Protoconch planispiral of about 1.75 whorls with a shallow sinusigera. Adult shell length 2.8 mm.

REMARKS

A single, slightly worn specimen was found in the studied material. No differences can be seen with respect to specimens coming from other Indo-West Pacific localities.

References

HABE T. 1963. - Eight minute species of shells from Amami Islands far south of Kyushu, Japan, including six new species. Venus 22 (3): 229 - 237. https: // doi. org / 10.18941 / venusjjm. 22.3 _ 229

HASEGAWA K. 2000. - Caecidae, in OKUTANI T. (ed.), Marine Mollusks in Japan. Tokai University Press, Tokyo: 170 - 173.

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

SELLI R. 1974. - Molluschi quaternari di Massaua e di Gibuti, in Missione geologica dell'Azienda Generale Italiana Petroli (A. G. I. P.) nella Dancalia meridionale e sugli altipiani hararini (1936 - 1938). Documentazione Paleontologica, Accademia Nazionale dei Lincei 4 (2): 151 - 444, pls 1 - 30.

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

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

Figures

FIG. 3. — Side and ventral views of Caecum Fleming, 1813 and Mauroceras Vannozzi, 2019 species from BIOMAGLO expedition.: A, C. hyalinum Vannozzi, 2022 from Stn DW4847; B, C. egenum Vannozzi, 2017 from Stn DW4854; C, C. cf. mauritianum de Folin, 1868 from Stn DW4820; D, E, C. mauritianum; D, holotype MNHN-IM-2000-24911; E, paratype MNHN-IM-2000-24912; F-L, C. cooki Pizzini & Raines, 2011; F, specimen from Stn DW4847; G, H, specimens from Stn DW4854 (H, juv.); I-L, specimens from Stn DW4820; M, M. kajiyamai (Habe, 1963) from Stn DW4847; N, M. sandwichense (de Folin, 1881) juv.from Stn DW4854. Scale bar: 1 mm. Images D, E, courtesy of Ph. Maestrati (MNHN).

Abbreviations

NMNS	Taiwan [Republic of China], Taichung, National Museum of Natural Science
NMNS	National Museum of Natural Science
MNHN	Museum National d'Histoire Naturelle