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Guide to Pleurosira laevis

(Ehrenb.) Compère 1982

Pleurosira Laevis Guide
Credit: Pat Kociolek
  1. Ocelli 2
  2. Rimoportulae 2-3

Valves circular to elliptical and 65–120 μm in diameter. Two ocelli positioned opposite one another. Two to three rimoportulae are present, each with a small hyaline area surrounding each. Spinules are present across valve face and at the margin.