Parietal (A, C, E, G–K, M, N, P–S, U, W) and palatal (B, D, F, L, P, T, V, X) plicae and lamellae of Gudeodiscus species. A–MGudeodiscus (Gudeodiscus) phlyarius (Mabille, 1887) A–B Plectopylis phlyaria (after Gude 1901c) C–D Plectopylis moellendorffi (after Gude 1901c) E–F Vn10-49, G Vn09-24 H Vn10-56, I Vn9-16, spec.1 J Vn9-16, spec.2 K–M Plectopylis verecunda, MNHN 2012-2177 (3 different specimens) N–QG. (G.) messageri messageri (Gude, 1909) N–O Plectopylis messageri (after Gude 1909) P MNHN-IM-2012-2162, Q MNHN-IM-2012-2165 R–VG. (G.) messageri raheemi ssp. n, R 20071116C, spec.1. S–T 20071116C, spec.2. U–V 20080509C W–X Vn10-104B. Inner views: B, D, F, O; Outer views: L, T, V, X.