. Bulletins of American paleontology. Devonian Rugose Corals of Iowa: Sorauf 79 and very heavy dilation of septa accompanied by heavy deposits of stereome on horseshoe dissepi- ments (USNM 78646, , ). The occurrence of such colonies with very heavy collar of stereome surrounding the tabularium was recognized by Fenton and Fenton, who changed the status of the taxon to a subspecies, P. woodmani ordinatiim (1924, p. 47). Because this occurs commonly within the P. wood- mani population, I would not differentiate it from oth- ers. The morphotype is a distinct one, because of the solid co
. Bulletins of American paleontology. Devonian Rugose Corals of Iowa: Sorauf 79 and very heavy dilation of septa accompanied by heavy deposits of stereome on horseshoe dissepi- ments (USNM 78646, , ). The occurrence of such colonies with very heavy collar of stereome surrounding the tabularium was recognized by Fenton and Fenton, who changed the status of the taxon to a subspecies, P. woodmani ordinatiim (1924, p. 47). Because this occurs commonly within the P. wood- mani population, I would not differentiate it from oth- ers. The morphotype is a distinct one, because of the solid collar surrounding the tabularium, with long major septa that are irregularly bent at the corallite axis, but do not swirl to form the small "pseudo- aulos" that is common within the species. Trabecular fans are also very tight, and trabeculae and stereome together can hide horseshoe dissepiments in longitu- dinal section. Fifteen corallites in the holotype have a mean tabularium diameter of mm, with a colony mean number of septa of (). Thus, P. ordifUJtiim comprises a group of P. woodmani with small-diameters, and the small corallites have few septa. Size is not uniform throughout all heavily di- lated colonies within the species. Fenton and Fenton were correct when they wrote that, "there is in no respect a clear demarcation from the less exsert forms of woodmani" (1924, p. 48). As can be seen in Plate 46, figures 1-6, there is a complete spectrum from colonies with a relatively light weight skeleton to those with heavy calcification and abundant stereome, encompassing various "subspecies'" of P. woodmani. The holotype of the species P. levatnm was not sec- tioned by Webster and Fenton. They illustrated photos of the external surface of these corals with prominent calicinal necks on the upper surface (Fenton and Fen- ton, 1924, pi. 12, fig. 9) and undersurfaces showing holotheca absent (eroded?), revealing prominent rounded cora
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