Rhinocricus

Rodrigues, Patrícia E. S., Ott, Ricardo & Rodrigues, Everton N. L., 2012, New species and new records of millipedes of the genus Rhinocricus Karsch, 1881 (Spirobolida: Rhinocricidae) from southern Brazil, Zootaxa 3172, pp. 55-64 : 56

Key for the Rio Grande do Sul species of Rhinocricus

1. Pairs of scobinae beginning in the sixth segment............................................................. 2

- Pairs of scobinae beginning from seventh or eighth segment.................................................... 3

2. Anterior gonopods sternite as long as coxite or telepodite....................................... R. serranus sp. nov.

- Anterior gonopods sternite shorter than coxite or telepodite.................................................... 4

3. Scobinae beginning in the seventh segment................................................................. 5

- Scobinae beginning in the eighth segment.................................................................. 6

4. Posterior gonopod tibiotarsus with broad distal lamella.......................................... R. serratus Attems

- Posterior gonopod tibiotarsus with narrow distal lamella forming a more or less bifurcated distal end...................................................................................................... R. divaricatus Schubart

5. Anterior gonopod sternite wider than long................................................... R. gauchus sp. nov.

- Anterior gonopod sternite longer than wide.................................................. R. guaritas sp. nov.

6. Anterior gonopod sternite as long as wide, almost reaching the distal apex of coxite; basal width of sternite almost double the width of each coxite.................................................................. R. padbergi (Verhoeff)

- Anterior gonopod sternite small and short, around 2/3 of coxite length............................................ 7

7. Anterior gonopod sternite longer than wide, distal end with small groove and transversal semicircular depression; posterior gonopod tibiotarsus with indented lamella...................................................... R. itauba sp. nov.

- Anterior gonopod sternite as long as wide, distal end only with small groove; posterior gonopod tibiotarsus with smooth lamella................................................................................... R. vacariensis sp. nov.