1973
Sigmoopsis cf. perpunctata (Öpik) — Sidaravičiene, pp. 1183
1979
Sigmoopsis cf. perpunctata — Sidaravičiene, pp. 135, 137
1982
Sigmoopsis (Sigmoopsoides) sigmoopsoides Schallreuter, 1964 — Schallreuter, pp. 19-21, fig. 3:1-6
1992
Sigmoopsis (Sigmoopsoides) sigmoopsoides Schallreuter, 1964 — Sidaravičiene, pp. 49-50, fig. 11:3