Figure 5. SEM pictures of (A, D, G) side and top views of protoconch, (B, E, H) radula morphology, and (C, F, I) surface sculpture of jaw of Cyclophorus species.

(A–C) Cyclophorus fulguratus s.s. specimen CUMZ 1327 from Khao Chakan, Sra Kaeo (Clade A; Fig. 1B). (D–F) Cyclophorus rangunensis specimen CUMZ 1781 from Thepmuangthong Temple, Uthaithani (Clade C; Fig. 1B). (G–I) Cyclophorus abditus sp. nov. paratype CUMZ 1828 from the type locality (Clade B; Fig. 1B).