Talitridae Rafinesque 1815

Key to the genera of New Zealand Talitridae (males only) 1. Gnathopod 1 with palmate lobe on propodus only............................................................ 2 - Gnathopod 1 with palmate lobe on both carpus and propodus.................................................. 3 - Gnathopod 1 with palmate lobe on merus, carpus and propodus......................... Transorchestia Bousfield, 1982 2. Antenna 2 peduncular articles 4 and 5 incrassate................................. Bellorchestia Serejo & Lowry, 2008 - Antenna 2 peduncular articles 4 and 5 small, not enlarged.......................... Manawataawhiorchestia gen. nov. 3. Pereopod 6 merus irregularly enlarged.......................................... Tatahipeke Hughes & Lowry, 2023 - Pereopod 6 merus not enlarged.......................................................................... 4 4. Pereopod 7 carpus massively expanded..................................... Aotearorchestia Hughes & Lowry, 2023 - Pereopod 7 carpus not massively expanded................................................................. 5 5. Gnathopod 2 dactylus posterior margin with posteroproximal projection interlocking with palm........................................................................................ Pictonorchestia Lowry & Springthorpe, 2021 - Gnathopod 2 dactylus posterior margin without projection interlocking with palm.................................. 6 6. Gnathopod 2 enlarged, propodus with palmate lobe on posterodistal corner (semi-mascupod)................................................................................................... Dallwitzia Lowry & Myers, 2019 - Gnathopod 2 massive, propodus lacking palmate lobe (mascupod)...........* Subantarctorchestia Hughes & Lowry, 2023 * Subantarctorchestia Hughes & Lowry, 2023 may be a synonym of Dallwitzia Lowry & Myers, 2019 (see Ball et al. 2024).