Aulacospira scalatella ( Moellendorff , 1888)

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 : 72

Aulacospira scalatella ( Moellendorff, 1888) Figures 3B, 5H

Helix scalatella Möllendorff, 1888: 145.

Aulacospira scalatella Möllendorff, 1898: 150; Pilsbry 1917 (1916-1918): 223, plate 38, figs 8-9; Schileyko 1998: 140, fig. 160.

Aulacospira (Aulacospira) scalatella Zilch, 1984: 167, plate 2, fig. 24.

Type locality.

"prope vicum Antipolo provinciae Manila".

Diagnosis.

Shell flattened, and keeled, penultimate whorl elevated from body whorl resulting in a step-like appearance, body whorl with slight subsutural furrow on the dorsal side, protoconch spirally striated near teleoconch, teleoconch roughly wrinkled and finely striated spirally; aperture with four denticles (2 palatal, 1 parietal, 1 columellar), sometimes with an additional weak basal tooth; aperture free from penultimate whorl.

Measurements (in mm).

H = 1.6-1.8, D = 2.7-2.8 (n = 3).

Types examined.

Philippinen: Antipolo, Prov. Manila, Luzon, coll. Möllendorff, SMF 4606 (lectotype, selected by Zilch [1984], H: 1.8 mm, D: 2.8 mm); same data, SMF 4607/9 paralectotypes.

Additional material examined.

Luzon Id., Rizal Prov, mts of Bosoboso, leg. Univ Alabama, TH Aldrich Coll (THA-3081), UF 112322 (2 shells).

Distribution.

This species is known from two localities in Luzon island (Fig. 2).