Angustopila reticulata Pall-Gergely & Hunyadi, 2023

Pall-Gergely, Barna, Hunyadi, Andras, Vermeulen, Jaap J., Grego, Jozef, Sutcharit, Chirasak, Reischuetz, Alexander, Dumrongrojwattana, Pongrat, Botta-Dukat, Zoltan, Oerstan, Aydin, Fekete, Judit & Jochum, Adrienne, 2023, Five times over: 42 new Angustopila species highlight Southeast Asia's rich biodiversity (Gastropoda, Stylommatophora, Hypselostomatidae), ZooKeys 1147, pp. 1-177 : 1

Angustopila reticulata Pall-Gergely & Hunyadi sp. nov.

Fig. 78

Type material.

Holotype: Vietnam • 1 empty shell (H: 0.94 mm, D: 0.86 mm); Thanh Hóa Province, Quan Hóa District, Khu di tích Hang Ma, gorge of Sȏng Luồng (locality code: 2020/30); 20°23.89'N, 105°04.02'E; 100 m a.s.l.; 12 Feb. 2020; A. Hunyadi leg.; HNHM 105313.

Paratypes: Vietnam • 1 figured shell + 15 shells; same data as for holotype; coll. HA.

Diagnosis.

A medium-sized Angustopila species with a conical shell, strong radial sculpture, a robust strong parietal tooth reaching the peristome edge, and an upper palatal tooth of comparable height, situated in the middle of the palatal region.

Description.

Shell of normal size for the genus, slightly higher than wide or rarely slightly wider than high; off-white, translucent when fresh, conical; body whorl widest in standard apertural view; protoconch consists of 1.25-1.5 whorls with spiral striation on the entire protoconch; teleoconch with strong, dense, irregularly spaced, radial ribs crossed by similarly strong spiral striae (ca. 15-16 on body whorl from standard apertural view); on both ventral and dorsal surfaces of body whorl spiral lines dominant or spiral and radial lines are of comparable strength; whorls 4, rounded or very slightly shouldered; aperture very slightly oblique to shell axis from lateral view; umbilicus wide; aperture pear-shaped, sinulus very narrow and strongly isolated due to the near joining of the strong parietal and palatal teeth; peristome expanded, not reflected; parietal callus protruding, detached from penultimate whorl (aperture not adnate); parietal tooth elevated but short, reaches parietal callus, perpendicular to parietal wall; upper palatal tooth almost as high as parietal one, situated near peristome edge just opposite of parietal tooth; a very tiny columellar tooth is indicated in the minority of examined shells; peristome protruding anterior to the palatal tooth.

Measurements (in mm).

H = 0.9-0.95, D = 0.86-0.93, H/D*100 = 86.9-109.3 (n = 5), RUD = 32.2 (n = 2).

Differential diagnosis.

See under A. tweediei sp. nov.

Etymology.

This new species is named after its pronounced reticulated sculpture.

Distribution.

Angustopila reticulata sp. nov. is known from the type locality only in Hòa Bình Province of northern Vietnam (Fig. 27 ).

Figures

Figure 27. Distribution of Angustopila species.

Figure 78. Angustopila reticulata Pall-Gergely & Hunyadi, sp. nov. A, C-H holotype (HNHM 105313) B paratype. Apertural (A, B), ventral (C), lateral (D), and apical (E) sides of the shell; sculpture on the protoconch (F), ventral (G) and frontal (H) surface of the body whorl.