Chamalycaeus irmatallus Páll-Gergely, 2021

Páll-Gergely, Barna, Gojšina, Vukašin & Aravind, Neelavar Ananthram, 2025, A review of Chamalycaeus, Cycloryx and Dicharax species of the Himalaya and Myanmar and seven new species of Alycaeinae from the Blue Mountain, Mizoram, India (Gastropoda, Caenogastropoda, Cyclophoridae), European Journal of Taxonomy 1029, pp. 1-158 : 11

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 .