Type species: Batostoma irrasum Ulrich, 1886
| Synonyms | Author | Type Species |
|---|---|---|
| Labyrinthotuba | Gorka, 1969 | Labyrinthotuba kozlowskii Gorka, 1969 |
This genus includes the species:
| Hemiphragma bassleri | Ruedemann, 1925 | Ordovician Caradoc | USA New York |
| Hemiphragma batheri | Bassler, 1911 | Ordovician Caradoc | Sweden, Belarus |
| Hemiphragma bondarevi | Astrova, 1965 | Ordovician Llanvirn-Caradoc | Russia |
| Hemiphragma? convexa | (Gorka, 1969) | Ordovician | Poland |
| Hemiphragma curvilineum | Conti, 1990 | Ordovician | Italy Sardinia |
| Hemiphragma imperfectum | (Ulrich, 1890) | Ordovician Ashgill | USA Illinois |
| Hemiphragma irrasum | (Ulrich, 1886) | Ordovician | USA Minnesota |
| Hemiphragma kozlowskii | (Gorka, 1969) | Ordovician | Poland |
| Hemiphragma nonnulum | Astrova, 1965 | Ordovician Llanvirn-Caradoc | Russia |
| Hemiphragma ottawaense | (Foord, 1883) | Ordovician Caradoc | Canada Ontario, USA |
| Hemiphragma panderi | (Dybowski, 1877) | Ordovician Caradoc | Estonia |
| Hemiphragma pitchishuensis | Modzalevskaya, 1979 | Silurian | Russia |
| Hemiphragma priscum | Pushkin, 1999 | Ordovician | Belarus? |
| Hemiphragma pulchrum | Loeblich, 1942 | Ordovician Caradoc | USA Oklahoma |
| Hemiphragma pygmaeum | Bassler, 1911 | Ordovician | Sweden, Belaraus, Wales |
| Hemiphragma rotundatum | Bassler, 1911 | Ordovician Llanvirn | Estonia |
| Hemiphragma shermanense | Fritz, 1957 | Ordovician Caradoc | Canada |
| Hemiphragma subnonnulum | Modzalevskaya, 1980 | Ordovician | Russia |
| Hemiphragma subtile | Conti, 1990 | Ordovician | Italy Sardinia |
| Hemiphragma? tuberculatum | Nekhorosheva, 1965 | Ordovician Caradoc | Russia |
This information is based upon various sources, but no personal knowledge. I am indebted to the late Alan Horowitz for his compilation, and to Dr. J. Pachut.
I would be grateful for corrections to, or critical reviews of this information. This is not a 'final' version (an impossible ideal), but a working document.
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