1967
Isorthis parvulus Rybnikova, sp. nov. — Rybnikova in Gailite et al., pp. 180-181, fig. 16: 7-10
1975
Isorthis (Ovalella) parvulus — Walmsley & Boucot, pp. 78
1984
Isorthis parvulus Rybnikova,1967 — Rubel et al., pp. 8
2011
Isorthis parvulus Rybnikova,1967 — Rubel, pp. 46, fig. pl. 27: 1-14, 17