Type species: Semicoscinium pyramidatum Kopajevich, 1975
This genus includes the species:
| Eosemicoscinium burultobense | Plamenskaja, 1991 | Early Devonian Pragian-Emsian | Kazakhstan |
| Eosemicoscinium diversispinulatum | (Waschurova, 1964) | Early Devonian | Russia |
| Eosemicoscinium djungarense | (Nekhoroshev, 1977) | Middle Devonian Givetian | Russia |
| Eosemicoscinium laticarinatum | Plamenskaja, 1991 | Early Devonian Pragian-Emsian | Kazakhstan |
| Eosemicoscinium pyramidatum | (Kopajevich, 1975) | L. Silurian | Estonia |
| Eosemicoscinium serratum | Ernst, 2012 | Early-Middle Devonian | Spain |
| Eosemicoscinium tatjanae | Plamenskaja, 1991 | Early Devonian Lochkovian | Kazakhstan |
| Eosemicoscinium tzugolensis | (Popeko, 1977) | Lower Carboniferous | Russia? Transbaikal |
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