1880Ptychophyllum craigense MCoy — Lindström, pp. 23, fig. 1:14
1969Streptelasma cyrtum n. sp. — Neuman, pp. 23, fig. 15A-G; 16A-E; 17A-G; 18A-E; 19
Selection of related publications
Neuman, B. 1969.
Upper Ordovician Streptelasmatid Corals from Scandinavia.Bulletin of the Geological Institutions of the University of Uppsala1,
1,1-73.