Taphrenalla asamurai (Panha, 1997)

(figs 1, 3, 5, 6A, 7A–C, table 6)

Macrochlamys asamurai Panha, 1997: 101–105, figs 2a, 2b 1, 3 –4. Type locality: Takun Village, Suratthani, Thailand .

Macrochlamys asamurai: Maneevong, 2000: 26–27, fig. 4-1.

Sarika asamurai: Sutcharit & Panha, 2008: 95–100, figs 2c, d, 3f–i, 4d–f.

Material examined. Type material: not examined. Non-type material: Wat Tham Wararam, Phanom District, Surat Thani (98°53’07.3”N 98°40’01.0”E): CUMZ 7153 (fig. 6A; 26 shells and 15 specimens in ethanol), CUMZ 7154 (six specimens in ethanol), CUMZ 7155 (14 shells and eight specimens in ethanol), and CUMZ 7156 (four shells) . Limestone outcrops at Khlong Sok, Phanom District, Surat Thani (8°53’39.3”N 98°33’10.7”E): CUMZ 7157 (three shells) and CUMZ 7158 (one shell) . Limestone outcrops at Khlong Sok, Phanom District, Surat Thani (8°50’51.2”N 98°44’18.0”E): CUMZ 7159 (31 shells and 12 specimens in ethanol). Wat Tham Phanthurat, Phanom District, Surat Thani (8°54’01.3”N 98°31’30.2”E): CUMZ 7160 (three specimens in ethanol) .

Remarks. Taphrenalla asamurai had been re-described and illustrated by Sutcharit & Panha (2008). The unique characters are a depressed conic shell of medium size (width up to 21.1 mm; height up to 11.7 mm), deep and narrow impressed suture, and long radial grooves that appeared on the last 37–64 grooves (n = 32; figs 5, 6A). The genitalia are bent at the epiphallic caecum, and the proximal part of dart apparatus is with a thick and swollen sac-like structure (figs 7A, 7B). Spermatophore has one spine on the tail filament close to the sperm sac (fig. 7C). Living snails have monochrome red to dark red on tail (fig. 3).