1891
Bollia semicircularis n. sp. — Krause, pp. 497, fig. 31:8-9
1934
Bollia semicircularis Krause — Bassler & Kellett, pp. 219
1954
Signetopsis semicircularis (Krause, 1891) — Henningsmoen, pp. 63-64, fig. 7:10-15
1968
Signetopsis semicircularis (Krause) — Sarv, pp. 88, 92