Helix (Trachia) delibrata var. khasiensis Nevill, 1877, taxon inquirendum

Pall-Gergely, Barna, Ablett, Jonathan D., Szabo, Marton & Neubert, Eike, 2022, Revision of the " Chloritis delibrata (Benson, 1836) " group (Gastropoda, Stylommatophora, Camaenidae), ZooKeys 1086, pp. 1-31 : 1

Helix (Trachia) delibrata var. khasiensis Nevill, 1877, taxon inquirendum

Helix delibrata (?) var. Hanley & Theobald, 1870: pl. 14, fig. 9.

Helix (Trachia) delibrata Var. khasiensis Nevill, 1877: 21.

Chloritis (Trichochloritis) delibrata var. khasiensis Gude, 1914: 173.

Chloritis delibrata var. khasiensis Richardson, 1985: 93.

Chloritis delibrata khasiensis Ramakrishna et al., 2010: 326.

Type locality.

"Khasi Hills".

Types.

Not found in the NHM or in the ZSI (Sheikh Sajan, pers. comm. April 2020).

Remarks.

Nevill (1877) named the form illustrated in Hanley and Theobald’s (1870) Conchologia Indica (pl. 14, fig. 9) as var. Chloritis khasiensis , and mentioned that it has more raised and rounded whorls and a less open umbilicus than the typical H. delibrata . Nevill’s (1877) description was as follows: "The raised and rounded whorls, less open umbilicus, and contracted aperture will distinguish the form; it has sometimes a single brown band, but is often without it; it is tolerably abundant in the Naga and Khasi Hills. (...) Var. Chloritis khasiensis , from Khasi Hills, axis 8.5, diam. 19.5 (apert. 9, diam 10.5) mm".

Bouchetcamaena fusca sp. nov. agrees with some parts of Nevill’s description (more raised spire and narrower umbilicus than in other similar species), and the Naga and Khasi Hills also match, but the specimens we described above as B. fusca sp. nov. possessed no band and are all smaller than the size mentioned by Nevill. Furthermore, the shell illustrated by Hanley and Theobald (1870) possesses a subsutural furrow (a furrow running between the middle of the body whorl and the suture), which is absent in all B. fusca sp. nov. shells we examined. Thus, we decided to describe these specimens as a new species and consider the name Helix (Trachia) delibrata var. khasiensis as a taxon inquirendum.