Dioryx messageri (Bavay & Dautzenberg, 1900)
Alycaeus (Dioryx) messageri Bavay & Dautzenberg, 1900a: 119.
Alycaeus (Dioryx) messageri - Bavay and Dautzenberg 1900b: 453, pl. 11, figs 7, 8.
Dioryx messageri - Kobelt 1902: 339; Páll-Gergely et al. 2017: 10, fig. 4B; Inkhavilay et al. 2019: 15, fig. 6A (fig. 6B is D. rosea ).
Type locality.
“That-Khé” .
Material examined.
That-Khé , leg. Messager, MNHN-IM-2000-31785 (1 syntype); Tonkin, NHMW 41004 (2 shells).
Remarks.
Protoconch rather glossy, R1 with widely spaced, low, irregular ribs and dense, rather prominent spiral striae; R2 of ca. 90°, with alternating thinner/lighter and thicker/darker stripes.