Type species: Chaetetes quadratus Rominger, 1866
This genus includes the species:
| Rhombotrypa multitabulata | Utgaard & Perry, 1964 | U. Ordovician | USA (Ohio, Indiana) |
| Rhombotrypa quadrata | (Rominger, 1866) | Ordovician | USA (Ohio) |
| Rhombotrypa ramulosa | Bassler, 1923 | Silurian Ludlovian | USA West Virginia |
| Rhombotrypa? subquadrata | (Ulrich, 1882) | Ordovician Ashgill | USA, Greenland |
Rhombotrypa from Cincinnati region: at University of Georgia.
Rhombotrypa from Nashville region: at University of Georgia.
Rhombotrypa quadrata (indicated as Monotrypella) from the Ordovician of Ohio - at Yale Peabody Natural History Museum.
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