Key to males of Rotigonalia Young

1. Aedeagus with pair of clawlike processes at apex (Fig. 5) .............................................................................................................. 2

- Aedeagus without apical processes ................................................................................................................................................. 3

2. Pygofer 2.5x longer than wide; style apices directed outwards; body length 5.7–5.8 mm ............................ R. larissae Cavichioli

- Pygofer 1.5x longer than wide; style apices directed inwards (Fig. 4); body length 9.5 mm ................................. R. regina sp. nov.

3. Aedeagus bicurved, in lateral view with basidorsal lobe bearing tuft of setae ............................................... R. curvula Cavichioli

- Aedeagus not as above ..................................................................................................................................................................... 4

4. Paraphyses with rami straight, in lateral view with apices broadened and truncate ........................................ R. olivacea Cavichioli

- Paraphyses with rami curved dorsally, with apices acute............................................................................ R. concedula (Melichar)