1891
Bollia rotundata n. sp. — Krause, pp. 497, 516 , fig. 31:10
1934
Bollia rotundata Krause — Bassler & Kellett, pp. 219
1954
Signetopsis semicircularis (Krause, 1891) — Henningsmoen, pp. 63-64, fig. 7:10-15
1971
Signetopsis semicircularis (Krause, 1891) — Abushik, pp. 58, fig. 7:6-7
1980
Signetopsis semicircularis (Krause) — Abushik, fig. 2:14
1991
Signetopsis rotunda (Krause, 1891) — Hansch, pp. 87-88, fig. 2:2