Key to the species groups of Charinus:

1. Female with thin, finger-like gonopods (Weygoldt 2005: figs 4, 8) …………………………………… …………………………………………………………… C. bengalensis species group (next key)

– Female with rounded, cushion-like gonopods (Weygoldt 2006: figs 1–10) …………………………… ……………………………………………………………………… C. australianus species group–

– Female with sucker-like gonopods (Vasconcelos et al. 2014: figs 17–18) …………………………… …………………………………………………………………… C. brasilianus species group