Metalycaeus (?) laevis (Pilsbry & Y. Hirase, 1909)

Pall-Gergely, Barna, Sajan, Sheikh, Tripathy, Basudev, Meng, Kaibaryer, Asami, Takahiro & Ablett, Jonathan D., 2020, Genus-level revision of the Alycaeidae (Gastropoda, Cyclophoroidea), with an annotated species catalogue, ZooKeys 981, pp. 1-220 : 1

Metalycaeus (?) laevis (Pilsbry & Y. Hirase, 1909)

Alycaeus laevis Pilsbry & Y. Hirase, 1909a: 588.

Chamalycaeus laevis - Minato 1988: 15, pl. 2, figs 6-8.

Metalycaeus laevis - Páll-Gergely and Asami 2017: 4.

Type locality.

"Nakanoshima ( Ōsumi)”.

Material examined.

Nakanoshima, Ōsumi, leg. Hirase, 1908, ANSP 95831 (lectotype, designated by Baker, 1964, photographs examined); Nakanoshima, Osumi (written in Japanese), coll. Hirase 268, NSMT-Mo 7579 (6 shells).

Remarks.

The NSMT sample we examined contained six shells with clearly visible protoconch sculpture. Four shells had spiral lines on the protoconch but in the case of two shells no spiral striae were visible. In all cases the protoconch was elevated. R2 with ca. 36 ribs, which are only just elevated from the surface of the shell. They are seemingly fully attached to their neighbours. There are no spiral lines visible on R1. The spiral striae stop at the protoconch-teleoconch border.