Trichocathaica lyonsae lyonsae (Gude, 1919)

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 : 31

Trichocathaica lyonsae lyonsae (Gude, 1919) Figure 10 A–C

Cathaica (Trichocathaica) lyonsae Gude, 1919: 119 + unnumbered figure.

Trichocathaica lyonsae - Yen 1939: 150, plate 15, fig. 43.

Types examined.

Min Valley, Setchuen, coll. Gude, NHMUK 1922.8.29.86 (syntype).

Type locality.

"Min Valley, Setchuen".

Diagnosis.

Shell sinistral, body whorl slightly shouldered, teleoconch roughly wrinkled with medium-sized scale-like periostracal folds; some folds are developed to long hairs.

Description.

Shell sinistral, spire slightly elevated, dorsal side rather low conical; body whorl slightly shouldered; protoconch consists of 1.5 whorls, finely, irregularly wrinkled; entire shell with 5.5 whorls; teleoconch roughly, irregularly wrinkled, with moderately large, triangular periostracal folds; some folds on the edge of body whorl and in the suture developed to long, cylindrical hairs; in shell parts without periostracum the base of folds visible as deep scars; aperture subcircular, slightly ovoid (depressed in dorsobasal direction); upper peristome edge strongly descending (mostly visible from lateral view); peristome slightly expanded, sharp; inner thickening parallel to the peristome strong, white.

Measurements (in mm).

D = 17.3, H = 8.7 (photographed syntype).

Distribution.

This subspecies is known from the type locality only.