Tabulate corals achieved a maximum distribution in shallow and warm Silurian and Devonian seas. Syringopora like other tabulate corals lived on the crests of the reef. Syringopora preferred shallow, moving water with settling calcareous sediment. The clumps of narrow, cylindrical, thick walled corallites, which were set far apart were irregularly joined together by horizontal tubular fannel-shaped connections. This Syringopora is from the Silurian.
Syringopora (tabulate coral)
Themnopora (“feather duster coral)”
This is Thamnopora from Silurian limestone. Thamnopora is a branching tabulate coral. The name tabulate refers to the tabulae, horizontal
elements visible in longitudinal section. All tabulate corals are colonial.