Key to Genera of Pseudoliodini of Latin America (from Peck et al., 1998a)

1a Mesoventral keel low to well developed, not vertical; angle of keel in lateral view low or rounded; spines on external edge of mesotibia subequal in length to longest apical spur and longer than basal tarsal segment; Mexico and Central America.................................................................................................... Colenis

1b Mesoventral keel very well developed, vertical; angle of keel in lateral view usually a distinct right angle; spines on external edge of mesotibia shorter than longest apical spur or basal tarsal segment; Chile and Argentina .............. Neohydnobius