Type species: Nicholsonella gibbosa Bassler, 1911
This genus includes the species:
| Revalotrypa? arborea | (Modzalevskaya, 1953) | Ordovician Floian-Dapingian | Russia |
| Revalotrypa eugeniae | Goryunova, 1988 | Early Ordovician | Russia |
| Revalotrypa gibbosa | (Bassler, 1911) | Ordovician Darriwillian-Katian | Estonia, Russia |
| Revalotrypa honguedensis | Ernst & Munnecke, 2009 | Late Ordovician Hirnantian | Canada Quebec Anticosti Is. |
| Revalotrypa infundibularis | Liu, 1980 | Middle Ordovician | China |
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