Dioryx cochinensis (Godwin-Austen, 1914)

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

Dioryx cochinensis (Godwin-Austen, 1914)

Alycaeus (Dioryx) cochinensis Godwin-Austen, 1914: 428-429, pl. 156, figs 7, 7a.

Dioryx cochinensis - Páll-Gergely et al. 2017: 10.

Type locality.

"Cochin China".

Material examined.

Cochin China, NHMUK 20170011 (holotype [single specimen mentioned in the original description], measurements of the specimen: D = 6.1, H = 7.0). See also Remarks.

Remarks.

Protoconch without spiral striae; R1 with very fine spiral striation and weaker, irregular, wavy growth lines; R2 very short, smooth, narrow light and thicker dark stripes alternating.

According to the original description of A. cochinensis , only a single shell was found "stuck on the same slab with Alycaeus gibbus " and originated from the collection of Hugh Cuming. We were unable to locate the holotype in the type collection of the NHM, but found a shell in the general collection labelled " Dioryx cochinensis G.-A. ms., Cochin China (Cuming)", with a black glue mark on its body whorl indicating that it was previously mounted as indicated in the original description. This specimen is identical with the figures of Godwin-Austen (1914) (characteristic shell shape from apertural view: pl. 156, fig. 7; and the very short tube: pl. 156, fig. 7a). Therefore, we identify this specimen as the holotype of Dioryx cochinensis . The measurements provided by Godwin-Austen (1914) are the following: "major diam: 5.5; alt. axis 4.75 mm". Our measurements of the specimen are, however, somewhat larger, namely D: 6.1 mm, H: 7 mm. This is probably due to the inaccuracy of the original measurements (as usual in Godwin-Austen’s specimens), and we do not question the status of the specimen.