Rugosa

Helicelasma poulseni (Cox, 1937)

Synonymy list
1937     Streptelasma poulseni — Cox, pp. 9,10, fig. 2:8,9
1975     Helicelasma poulseni — McLean & Webby, pp. 233
1981     Helicelasma poulseni (Cox, 1937) — Elias, pp. 20