Iii

outer wall (epitheca)

i tabula

dissepimentarium i tabula

dissepimentarium septa

calicular boss calice fossula epitheca calicular platform tabulae rugose corallite Amplexizaphrentis operculum calicular boss calice operculum

septal groove calicular pit interseptal ridge septal groove rugose corallite Amplexizaphrentis calicular pit

Palaeosmilia

teîiîfnr fossula epitheca calicular platform transverse striation rootlet transverse striation

rootlet

Omphyma

Palaeosmilia

Omphyma

Figure 11.23 (a) Septal and tabular development in solitary rugose corals with (i) details of vertical partitions, and (ii) details of horizontal structures. C, cardinal septa; K, counter-cardinal septa; KL, counterlateral septa; L, alar septa. (b) Rugose coral morphology: external morphology of a variety of solitary rugose corals. (Based on various sources.)

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