9a.
– Colony foliose or heart-shaped, with polyps on upper surface.
Sclerites rod-like. No axis
...........................................Family
Renillidae
Renilla reniformis
(Pallas), 1766

Renilla reniformis
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9b. – Colony
slender, elongate, pen-like or clavate, often with naked dorsal
groove or track. Sclerites, when present, as scales or needles.
Axis always present ................................................10

left:
Sclerobelemnon theseus; middle: Virgularia
presbytes; right: Stylatula elegans
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