Chamalycaeus irmatallus Páll-Gergely, 2021

Fig. 5J–N

Chamalycaeus irmatallus Páll-Gergely in Páll-Gergely et al., 2021: 14–15, figs 9, 10a.

Type material examined

THAILAND • holotype; Surat Thani Province, Limestone Mt, 6 km S of Na San; 8°39.583′ N, 99°23.883′ E; 100 m a.s.l.; 3 Jun. 1987; F.G. Thompson leg.; UF 279508 • 11 paratypes; same data as for preceding; UF 551216 .

Additional material examined

MYANMAR • 6 shells (see Páll-Gergely et al. 2021: fig. 10); Thayet-myo, Pegu; Blanford coll.; NHMUK 1906.4.4.71 .

Type locality

“ Thailand, Surat Thani Province, limestone mtn., 6 km S of Na San, 8°39.583′ N, 99°23.883′ E; 100 m a.s.l.”.

Differential diagnosis

Chamalycaeus armillatus has a more rounded body whorl, longer R2 and R3, and a thicker peristome with greater distance between the edges of the inner and outer peristomes (Páll-Gergely et al. 2021). See also under C. humilis .