Type species: Fenestella (Hemitrypa) lata Hall, 1883
This genus includes the species:
| Unitrypa acaulis | (Hall, 1881) | Middle Devonian Eifelian | USA Indiana |
| Unitrypa acaulis inclinis | Hall & Simpson, 1887 | Middle Devonian Eifelian | USA Indiana |
| Unitrypa acclivis | Hall & Simpson, 1887 | Early Devonian Emsian | USA New York |
| Unitrypa anonyma | (Hall, 1881) | Middle Devonian Eifelian | USA Indiana |
| Unitrypa balchashensis | Plamenskaja, 1991 | Early Devonian Lochkovian | Kazakhstan |
| Unitrypa casteri | McNair, 1940 | Early Devonian Emsian | Colombia |
| Unitrypa chukochensis | Nekhorosheva, 1996 | Early Devonian Lochkovian | Russia |
| Unitrypa consimilis | (Hall, 1885) | Early Devonian Emsian | USA New York |
| Unitrypa constricta | (Hall, 1879) | Early Devonian Lochkovian | USA New York |
| Unitrypa? elegantissima | Hall, 1881 | Early Devonian Emsian | USA New York |
| Unitrypa fastigata | (Hall, 1881) | Middle Devonian Eifelian | USA Indiana |
| Unitrypa ficticia | Hall & Simpson, 1887 | Early Devonian Emsian | USA New York |
| Unitrypa granulata | Waschurova, 1964 | Early Devonian | Russia |
| Unitrypa hemitrypoides | Nekhoroshev, 1977 | Middle Devonian Givetian | Russia |
| Unitrypa lata | (Hall, 1883) | M. Devonian | Canada (Ontario) |
| Unitrypa lonsdalei | (d'Orbigny, 1850) | Silurian Wenlock | England |
| Unitrypa nana | Hall & Simpson, 1887 | Early Devonian Emsian | USA New York |
| Unitrypa nervia | (Hall, 1874) | Early Devonian Emsian | USA New York |
| Unitrypa pentzikentica | Waschurova, 1964 | Early Devonian | Russia |
| Unitrypa pernodosa | (Hall, 1881) | Early Devonian Emsian | USA New York |
| Unitrypa praecursor | (Hall, 1874) | Early Devonian Lochkovian | USA New York |
| Unitrypa projecta | Hall & Simpson, 1887 | Middle Devonian Eifelian | USA Indiana |
| Unitrypa quadrula | (Hall, 1879) | Early Devonian Lochkovian | USA New York |
| Unitrypa rjabinini | Nekhoroshev, 1972 | Silurian Llandovery | Kazakhstan |
| Unitrypa scalaris | (Hall, 1884) | Middle Devonian Givetian | Russia Taimyr |
| Unitrypa stipata | (Hall, 1881) | Middle Devonian Eifelian | USA Indiana |
| Unitrypa subcircularis | Stewart, 1922 | Early Devonian Lochkovian | USA Missouri |
| Unitrypa substriata | (Hall, 1881) | Early Devonian Emsian | USA New York |
| Unitrypa tegulata | (Hall, 1881) | Middle Devonian Givetian | USA New York |
| Unitrypa transversa | Hall & Simpson, 1887 | Middle Devonian Eifelian | USA Indiana |
| Unitrypa uruschense | Modzalevskaya & Nekhoroshev, 1965 | Early Devonian | Russia |
Unitrypa scalaris - at New York Paleontology.
Unitrypa nervia from the Devonian of New York - at Yale Peabody Natural History Museum.
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