Type species: Atactotoechus chazyensis Ross, 1963
This genus includes the species:
Key, 1990 | Ordovician | USA Oklahoma | WoRMS 1400779 | |
(Ross, 1963) | Middle Ordovician | USA, Canada | WoRMS 1410451 | |
(Ross, 1963) | Ordovician | USA New York | WoRMS 1410452 | |
(Loeblich, 1942) | Ordovician | USA Oklahoma | WoRMS 1410453 | |
Key, 1990 | Ordovician | USA Oklahoma | WoRMS 1400780 |