Figure 8
LM and SEM images of Paralia guyana ‘servidei’ valves. (A,B) Van3C1. Light micrographs. (A) Tilted separation valve showing valve face and mantle. Note that even the characteristically pronounced prickles in this genodeme are not detectable on LM image; fenestrae notable. (B) A chain of live cells. (C-G) Scanning electron micrographs. Isotype specimens of P. guyana B40 0040796. (C,D) Van3C1. Valve face view. (C) Intercalary valve face with capitate, slender marginal spines (arrow). (D) Separation valve with pronounced prickles (arrows). (E) West1C2. Interlocked sibling intercalary valves and cingulae; upper valve with some fenestrae unobscured. (F) West1C2. Mantle view of relief separation valve showing prickles on the mantle. (G) West1C2. Internal view of valve with rimoportulae (arrows) and striae. Scale bars = 5 μm (A-F), 2 μm (G).