Figure 3
LM and SEM images of Paralia marina . (A,B) CCAP 1059/2. Light micrographs. (A) Interlocked sibling valves showing narrow fenestrae. (B) Chain of live cells showing the outline of the cell lumen. (C-H) Scanning electron micrographs. Epitype specimens, B40 0040792. (C-F) Valve face view. (C) Uru6. Smooth intercalary valve in relief showing long, slender and capitate marginal linking spines (arrow). (D,E) Intaglio valves (square-shouldered, short and blunt spines [12]). (D) Par1. Separation valve with smooth valve face and unadorned margin. (E) Intercalary valve showing marginal ridge formed by blunt, short spines with notches (arrow) between them which interlock with end of long, slender marginal spines. (F) Uru1. Incompletely silicified separation valve with rows of pores in a decussate pattern on the valve mantle (arrow). (G,H) Girdle view of sibling intercalary valves. (G) Helgo3. Nearly interlocked valves with long, slender capitate marginal linking spines (arrow), narrow fenestrae exposed, marginal square-shouldered, blunt spines with notches (black arrowhead) and simple slits in copulae (white arrowhead). (H) Uru6. Completely silicified interlocked sibling valves with fenestrae obscured. Scale bars = 5 μm (B,D), 3 μm (A), 2 μm (C,E-H).