Species
Signetopsis semicircularis (Krause, 1891)
Synonymy list
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
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Ostracoda |
| Order | Beyrichicopida |
| Suborder | Palaeocopa |
| Superfamily | Primitiopsacea |
| Family | Primitiopsididae |
| Subfamily | Primitiopsinae |
| Genus | Signetopsis |
| Species | malornata |
| quadrilobata | |
| rotundata | |
| semicircularis |