High-resolution Fig. 18

High-resolution Fig. 18. Scanning electron microscopy images of Rugocythereis reticulata Ayress, 1993b, Rugocythereis klaszi (Colin, 1987) and Rugocythereis zarikiani sp. nov. A, C, E, G, I, K, M, O, Q–R, lateral views; B, D, F, H, J, L, N, P, internal views. A–D, R. reticulata Ayress, 1993b. A–B, USNM 558064; adult LV from Hampden Formation, outcrop, Middle Eocene. C–D, USNM 558065; adult RV from Hampden Formation, outcrop, Middle Eocene. E–L, R. klaszi (Colin, 1987). E–F, USNM 558066; adult LV from DSDP 329, 5/6/80–88, Late Miocene. G–H, USNM 558067; adult RV from DSDP 329, 5/6/80–88, Late Miocene. I–J, USNM 558068; adult RV from DSDP 327A, 12/3/50–55, Maastrichtian, Upper Cretaceous. K–L, USNM 558069; adult LV from DSDP 327A, 13/2/100–105, Campanian–Maastrichtian, Upper Cretaceous. M–R, R. zarikiani sp. nov. M–N, paratype USNM 558070; adult LV from DSDP 284, 18/1/130–137, Late Miocene. O, paratype USNM 558071; adult LV from DSDP 279A, 8/1/81–89, Early Miocene. P–Q, holotype USNM 558072; adult LV from DSDP 279A, 8/1/81–89, Early Miocene. R, paratype USNM 558073; adult LV from DSDP 279A, 8/1/81–89, Early Miocene. Scale bars represent 1 mm.