Guide to Eupodiscus radiatus
Credit: Emily Nodine, James Ehrman
- Valves circular with hexagonal areolae uniform across valve
- Prominent ocelli near valve margin, usually four
- Rimoportulae on valve margin
- Valve margin scalloped, forming circumferential ridge
Valves circular with hexagonal areolae uniformly distributed across valve; a distinct central area is absent. Prominent ocelli are present near the valve margin, usually 4, sometimes 3-6. Rimoportulae may be visible on interior valve interspersed with ocelli, 1-2 between each pair of consecutive ocelli. The valve margin is scalloped, forming a narrow circumferential ridge.