Holthuis, 1985
Carapace strongly depressed, with a deep cervical incision in the lateral margin. Mandible with a simple or two-segmented palp. Fifth thoracic leg of female with chela.
Type Genus: Ibacus Leach, 1815.
The subfamily which Holthuis (1985) revised, providing keys to all species, includes three genera, all of which are treated here.