Definition Winsor L 1990 (citation)-: Discoid to obcordate in shape. Color results from pigments and symbiotic algae: often with two coexisting species of symbiotic algae. Brain insunk. Mouth ventral and in posterior third of body. Rhabdoids present. Ovaries and testes paired. With Subterminal male genital pore. Male antrum ciliated. Seminal bursa with paired lateral bursa canals. Eyes, statocyst, frontal glands present. Female genital pore and penis absent. Epizoic on corals.[From Winsor L (1990)]
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