Fig. 11From: Kasimovian (late Pennsylvanian) cornute rugose corals from Egypt: taxonomy, facies and palaeogeography of a cool-water fauna from northern GondwanaA, B Zaphrentites cf. parallela (Carruthers, 1910). A1–A3 Successive transverse sections in the specimen RAh (118), starting from the early immature stage with zaphrentoid arrangement of the septa in A1 to the last mature stage below the calice in A3. B1 External lateral view of the specimen RAh (109), showing strong longitudinal ribbing on the corallite wall. Positions of thin-sections indicated. B2–B4 Successive transverse sections represent the ontogenetic development, starting from the immature section in the apical part in B2 to the last mature section below the calice floor in B4. C Zaphrentites sp. C1 External view of the specimen RAh (84). C2–C4 Successive transverse sections; from the immature section in C2 to the last mature section below the calice floor in C4. Black dots indicate the positions of cardinal septum (below), counter septum (above) and the two alar septaBack to article page