Type species: Trematella glomerata Hall, 1886
This genus includes the species:
| (Hall, 1881) | Devonian Eifelian | USA | WoRMS 1414152 | |
| (Hall, 1881) | Devonian Eifelian | USA | WoRMS 1414153 | |
| Hall, 1886 | Devonian Emsian | USA New York | WoRMS 1409414 | |
| Hall & Simpson, 1887 | Devonian Givetian | USA | WoRMS 1409415 | |
| (Hall, 1881) | Devonian Givetian | USA | WoRMS 1414154 |