Aulacospira triptycha Quadras & Moellendorff , 1895

Pall-Gergely, Barna, Schilthuizen, Menno, Oerstan, Aydin & Auffenberg, Kurt, 2019, A review of Aulacospira Moellendorff, 1890 and Pseudostreptaxis Moellendorff, 1890 in the Philippines (Gastropoda, Pupilloidea, Hypselostomatidae), ZooKeys 842, pp. 67-83 : 74

Aulacospira triptycha Quadras & Moellendorff, 1895 Figures 1A, 5C

Aulacospira triptycha Quadras & Möllendorff, 1895: 76; Möllendorff 1898: 151.

Aulacospira triptycha Pilsbry, 1917 (1916-1918): 223.

Aulacospira (Aulacospira) triptycha Zilch, 1984: 167, plate 2, fig. 29.

Type locality.

"in monte Bathuan prope vicum Palanoc insulae Masbate".

Diagnosis.

Shell discoid, strongly keeled, last half whorl with slight subsutural furrow on the dorsal side, protoconch smooth, teleoconch roughly wrinkled and finely striated spirally; aperture with a columellar and a palatal tooth; aperture adnate to penultimate whorl.

Measurements (in mm).

H = 1.8, D = 4.5 (n = 1, holotype with damaged apex).

Types examined.

Philippinen: Bathuan, Palanoc, Ins. Masbate, coll. Möllendorff, SMF 4611/1 syntype.

Distribution.

This species is only known from the type locality on Masbate Island. Palanoc is the former capital of Masbate at the mouth of the Lumbang River (12°21.5'N, 123°34.5'E, Fig. 2).