Trophoniella, Hartman, 1959

Chaibi, Marwa, Antit, Mouna, Bouhedi, Marwa, Meca, Miguel A., Gillet, Patrick, Azzouna, Atf & Martin, Daniel, 2019, A new species of Flabelligeridae (Annelida), Trophoniella radesiensis n. sp., from Tunisia, Zootaxa 4571 (4), pp. 551-561 : 559

Key to the northern African and Mediterranean Sea species of Trophoniella

1. Anchylosed neurohooks first appearing on chaetigers 4–7.................................. T. incerta ( Augener, 1918)

- Anchylosed neurohooks first appearing on chaetiger 14 or posterior.............................................. 2

2. Tunic without sediment grains.................................................. T. fernandensis ( Augener, 1918)

- Tunic with sediment grains on both dorsal and ventral surfaces.................................................. 3

3. Sediment grains large, completely concealing the tunic............................ T. enigmatica Salazar-Vallejo, 2012

- Sediment grains varying in size, often small, not completely concealing the tunic................................... 4

4. Anterior chaetigers with notopodial lobes lacking papillae; first short neurohooks from chaetiger 10; anchylosed neurohooks from chaetiger 40............................................................. T. fauveli Salazar-Vallejo, 2012

- Anterior chaetigers with notopodial lobes carrying dorsal papillae; first short neurohooks from chaetiger 6; anchylosed neurohooks from chaetiger 20................................................................. T. radesiensis n. sp.