Fig. 8 in Bashkirian rugose corals from the Carboniferous Mattson Formation in the Liard Basin, northwest Canada -stratigraphic and paleobiogeographic implications

Fig. 8. Transverse (A1–A5, A8) and longitudinal (A6, A7) thin sections of aulophyllid rugose coral Heritschioides simplex sp. nov. (GSC 140526, holotype) from Liard Basin, Northwestern Territories, Canada, Mattson Formation, perhaps lower Bashkirian. Corallites in different growth stages (A1–A3), dissepimentarium and peripheral parts of septa (A4, A5), laterally offsetting corallite (A6), detail of parent/offset common tissue (A7), fragment of colony with twins (arrow) (A8). Black dots correspond to cardinal (lower) and counter (upper) septa.