Angustopila coprologos uninodus Pall-Gergely & Grego ssp. nov.

Fig. 88

Type material.

Holotype: Laos • 1 empty shell (H: 0.54 mm, D: 0.7 mm); Bolikhamsay Province, NE foot of Pha Hông limestone massif 7 km N of Lak Sao (locality code: JG12); 18°13.91'N, 104°56.41'E; 16 Feb. 2017; J. Grego leg.; NHMUK 20170295.

Paratypes: Laos • 3 shells; same data as for holotype; coll. JG • 1 shell; same data as for holotype; NMBE 550641 • 152 shells; Bolikhamsai Province, 5.2 km northwest from centre of Lak Sao, 600 m east of quarry, limestone rock (locality code: 2019/111); 18°13.54'N, 104°56.89'E; 515 m a.s.l.; 2 Oct. 2019; A. Hunyadi leg.; coll. HA • 5 shells; same data as for preceding; coll. JJV • 14 shells; Bolikhamsai Province, 5.3 km west-southwest of centre of Lak Sao, rock wall above Wat Pa Pha Nang Rong (locality code: 2019/109); 18°11.30'N, 104°56.45'E; 520 m a.s.l.; 1 Oct. 2019; A. Hunyadi leg.; coll. HA.

Differential diagnosis.

This subspecies differs from the nominotypical subspecies in the possession of a single (instead of two) palatal denticle. Judging from the relative position, the single palatal tooth of Angustopila coprologos uninodus ssp. nov. is homologous with the upper palatal tooth of A. coprologos coprologos .

Measurements (in mm).

H = 0.52-0.55, D = 0.7-0.75, H/D*100 = 73.3-77.1 (n = 3: JG12), RUD = 28.2-28.8 (n = 3).

Etymology.

The subspecific name Angustopila uninodus (one node) refers to the single palatal denticle of this subspecies, instead of the two palatal teeth of the nominotypical subspecies.

Distribution.

This subspecies is known from three nearby localities in Bolikhamsay Province, Laos. The type locality of the nominotypical subspecies is located on a mountain ca. 14 km to the southeast (Fig. 64).