High-resolution Fig. 15

High-resolution Fig. 15. Scanning electron microscopy images of Rugocythereis horrida (Whatley and Coles, 1987) and Rugocythereis leptodictyota (Ayress, 1995). A–D, F, H–I, K, M, O, R–S, lateral views; E, G, J, L, N, P–Q, internal views. A–N, R. horrida (Whatley and Coles, 1987). A, USNM 558052; adult LV from DSDP 552A, 16/2/130–132, Late Pliocene. B, USNM 558053; adult LV from DSDP 552A, 15/3/38–40, Late Pliocene. C, USNM 558054; adult RV from DSDP 552A, 9/3/58–60, Late Pliocene. D–E, USNM 558055; adult LV from KN714-15A, 393 m, Late Pleistocene. F–G, USNM 558056; adult RV from KN714-15A, 364 m, Late Pleistocene. H, USNM 558057; adult RV from KN714-15A, 30 cm, Holocene. I–J, USNM 558058; adult RV from Chain 82-24-4P, 638–640 cm, Late Pleistocene. K–L, USNM 558059; adult RV from NMC17, coretop, Modern. M–N, USNM 558060; adult RV from DSDP 277, 5/1/50–57, middle–late Oligocene. O–S, R. leptodictyota (Ayress, 1995). O, USNM 558061; adult LV from Ashley Mudstone Formation, outcrop, Late Eocene. P, S, USNM 558062; adult LV from Ashley Mudstone Formation, outcrop, Late Eocene. Q–R, USNM 558063; adult RV from Ashley Mudstone Formation, outcrop, Late Eocene. Scale bars represent 1 mm.