Type species: Atactoporella typicalis Ulrich, 1883
This genus includes the species:
| Atactoporella crassa | Ulrich, 1893 | Ordovician Sandbian-Katian | USA |
| Atactoporella densa | Dyer, 1925 | Ordovician Katian-Hirnantian | Canada |
| Atactoporella depressa | Astrova, 1957 | Silurian Wenlock | Russia Tuva |
| Atactoporella globosa | Kopajevich, 1984 | Silurian Wenlock | Mongolia |
| Atactoporella insueta | Ulrich, 1893 | Ordovician Sandbian-Katian | USA Minnesota |
| Atactoporella irregulariformis | Kopajevich, 1984 | Ordovician Katian-Hirnantian | Mongolia |
| Atactoporella irregularis | Boulange, 1964 | Ordovician Katian-Hirnantian | France |
| Atactoporella magnopora | Ernst & Key, 2007 | Ordovician Sandbian-Katian | France |
| Atactoporella modificata | Kopajevich, 1984 | Silurian Llandovery-Wenlock | Mongolia |
| Atactoporella multigranosa | (Ulrich, 1879) | Ordovician Sandbian-Katian | USA Ohio |
| Atactoporella mundula | (Ulrich, 1879) | Ordovician Caradoc=Sandbian-Katian | USA Kentucky, Ohio |
| Atactoporella newportensis | Ulrich, 1883 | Ordovician Sandbian-Katian | USA Kentucky |
| Atactoporella ortoni | (Nicholson, 1874) | Ordovician Sandbian-Katian | USA Ohio |
| Atactoporella peculiaris | (Dyer, 1925) | Ordovician Katian-Hirnantian | Canada Ontario |
| Atactoporella praecipta | Ulrich, 1893 | Ordovician | USA, Belarus |
| Atactoporella ramosa | Ulrich, 1893 | Ordovician Sandbian-Katian | USA Minnesota |
| Atactoporella schucherti | Ulrich, 1883 | Ordovician Katian-Hirnantian | USA Ohio, Indiana |
| Atactoporella spicata | Bassler, 1928 | Ordovician Ashgill=Katian-Hirnantian | Canada Quebec Anticosti Is. |
| Atactoporella tenella | (Ulrich, 1879) | Ordovician Sandbian-Katian | USA Ohio |
| Atactoporella typicalis | Ulrich, 1883 | Ordovician Sandbian-Katian | USA Kentucky, Ohio |
Atactoporella from Cincinnati region: at University of Georgia.
Atactoporella from Nashville region: at University of Georgia.
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