1969Helicelasma simplex n. sp. — Neuman, pp. 29-30, fig. 23A-G; 24A-J; 25A-F; 26
1975Helicelasma simplex Neuman, 1969 — Neuman, pp. 336
1981Helicelasma simplex Neuman, 1969 — Hill, pp. F156, fig. 86:1a-f
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.