Fig. 5 in A revision of the Devonian rugosan phillipsastreid genus Smithicyathus

Fig. 5. Wall and septal microstructures in the Upper Frasnian Smithicyathus. A. The holotype of massive Smithicyathus cinctus (Smith, 1945), Western Canada, GSC 9244, with non−cerioid, locally discontinuous intercorallite walls; for details of sampling location see McLean 1994b: 80, 81 (A1 transverse, A2 longitudinal section). B. Smithicyathus lacunosus (Gürich, 1896), Panek quarry, GIUS 384P 54, densely phaceloid colony with cerioid (tripartite) intercorallite walls predominating, but also with pseudocerioid segments, mainly between parent and offset corallites close to offsetting area, note also presence of 3rd order septa at some corallite peripheries (B1 transverse, B2 longitudinal section). C. Smithicyathus smithi (Różkowska, 1953), Zgórsko quarry, GIUS 382ZS 14, massive pseudocerioid colony with occasional intercorallite voids, bordered by epithecate walls (C1 transverse, C2 longitudinal section). Scale bar 2 mm for all items.