Trichocathaica macrosquamata Pall-Gergely

Pall-Gergely, Barna, unyadi, Andras & Asami, Takahiro, 2018, Enantiomorphs and taxonomy of three conchological species in flat-shelled snails Trichocathaica (Pulmonata, Camaenidae), ZooKeys 810, pp. 19-44 : 23-25

Trichocathaica macrosquamata Pall-Gergely sp. n. Figure 3

Material examined.

Setschuan, Wa-sae-Kou, coll. Jaeckel ex coll. Schäfer, SMF 216281, holotype (1 sinistral shell, D = 18.8 m, H = 10.6 mm, Fig. 3 D–F); same data, SMF 349504, paratype (1 dextral shell, Fig. 3 A–C); China, W-Sytschuan: Wa-sy-Kou am Tung, coll. O. Möllendorff ex coll. Potanin, SMF 8941, paratypes (2 sinistral shells, paralectotypes of amphidroma , 1 of them is corroded without hair scars); W-Sy-tschuan, SMF 9171, paratype (1 sinistral shell, paralectotype of amphidroma ).

Diagnosis.

Shell sinistral or dextral, body whorl rounded with a very slight indication of a keel, teleoconch finely wrinkled with medium-sized scale-like periostracal folds; fold scars represented as medium-sized curved lines.

Description.

Shell sinistral or dextral, spire slightly elevated, body whorl rounded with a very slight indication of a keel; protoconch consists of 1.25-1.5 whorls, finely, irregularly wrinkled; entire shell with 5.5-6 whorls; teleoconch finely, irregularly wrinkled, with medium-sized, low, dense periostracal folds having curved (C-shaped) base; scales visible to the naked eye; in specimens/shell parts without periostracum the bases of folds visible as curved lines; aperture subcircular, peristome slightly expanded, thin, sharp; inner, white thickening parallel to the peristome prominent, situated in some distance from peristome edge.

Measurements (in mm).

D = 18.8-23.7, H = 10.6-13 (n =4).

Differential diagnosis.

Trichocathaica macrosquamata sp. n. differs from T. vestita by exhibiting larger periostracal folds (scales) over the entire shell surface.

Etymology. This species is named after its scales on the shell surface, which are larger than those of T. vestita .

Distribution.

This species is known from the valley of the Dadu River at Wasigou.