Mauroceras sandwichense ( de Folin, 1881 )

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.8183536
persistent identifier	https://treatment.plazi.org/id/03A4967B-FFDD-FFD7-B29A-FE2FF27093DC
treatment provided by	Felipe (2023-07-24 11:53:16, last updated 2024-11-26 22:09:11)
scientific name	Mauroceras sandwichense ( de Folin, 1881 )
status

Treatment

Mauroceras sandwichense ( de Folin, 1881) View in CoL

( Fig. 3N View FIG )

Meioceras sandwichensis View in CoL [sic] de Folin, 1881: 18, pl. 1, figs 10, 11.

Mauroceras sandwichense View in CoL — Vannozzi 2019a: 60 and synonymy therein.

TYPE MATERIAL. — Holotype. Hawaii • dd; Hawaii; MNHN-IM-2000-24904 figured by Pizzini et al. 2013: fig. 15G .

TYPE LOCALITY. — Pacific Ocean, Hawaii.

MATERIAL EXAMINED. — Mayotte • 1 dd juv; Mozambique Channel , W Mayotte, BIOMAGLO Stn DW4854; 12°56’S, 44°58’E; 455-465 m depth; 4.II.2017; MNHN GoogleMaps .

DISTRIBUTION. — Indo-West Pacific, recorded from Red Sea, Mayotte and Hawaii ( Kay 1979; Blatterer 2019; Vannozzi 2019a).

DIAGNOSIS. — Shell small for the genus. Shell tubular, arched, slightly but clearly twisted in ventral view. Dorsal and ventral sides of the tube evenly arched. Septum slightly protruding, with a sharp dorsal mucro, slightly rotated toward the right side. Aperture simple, oblique. Early teleoconch coiled, trochospiral, widely umbilicated, starting to uncoil after about 1 whorl. Sculpture of slightly wavy collabral ribs in the early teleoconch, fading with teleoconch growth and disappearing in the adult stage. Transition to the adult stage rapid. Protoconch planorbid of 1. 5 whorls. Adult shell length 2 mm.

REMARKS

A single, rather worn juvenile stage was found in the examined material. This species shows a characteristically tightlycoiled early teleoconch that readily distinguishes it from the congeners ( Blatterer 2019; Vannozzi 2019a).

References

BLATTERER H. 2019. - Mollusca of the Dahab region (Gulf of Aqaba, Red Sea). Denisia 43: 1 - 480. https: // www. zobodat. at / pdf / DENISIA _ 0043 _ 0001 - 0480. pdf

FOLIN L. DE 1881. - Un Meioceras des Iles Sandwich, in DE FOLIN L. & PERIER L. (eds), Les Fonds de la Mer 4: chap. 8, 18, pl. 1. https: // www. biodiversitylibrary. org / item / 51439

KAY E. A. 1979. - Hawaiian Marine Shells. Reef and shore fauna of Hawaii. Section 4: Mollusca. Bernice P. Bishop Museum Special Publication 64 (4), 653 p. http: // hbs. bishopmuseum. org / pubs-online / pdf / sp 64 - 4. pdf

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. 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. 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).