Characters: Colonies are encrusting to massive,
with a tendency to form columns. Corallites are
usually widely spaced and conical, with clearly
alternating costae which are ea ...
Characters: Colonies are submassive or encrusting,
with an irregular surface. Corallites are small
and often crowded. Septa are in two unequal orders
of 12 each, the first bei ...
Characters: Colonies are massive to columnar with
a smooth or hillocky surface. Corallites are
rounded and equal in size. Costae do not alternate
strongly. There are 12 primar ...
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