Key to Genera of Sogdini of Latin America (modified from Peck et al., 1998 a and Newton et al., 2017)

1a Base of pronotum margined (with fine impressed line) immediately before base; mesosternum between mesocoxae nearly horizontal, flat............................................................................. Platyhydnobius

1b Base of pronotum not margined; mesosternum between mesocoxae either carinate, impressed, or nearly vertical.......... 2

2a Mesosternum between mesocoxae with strongly elevated carina or crest............................... Metahydnobius

2b Mesosternum between mesocoxae not carinate.............................................................. 3

3a Mesosternum between mesocoxae horizontal to oblique, with shallow rounded impression; metasternum with several deep foveae behind mesocoxae; body elongate-oval, nearly twice as long as wide, relatively flat; apical elytral-abdominal binding patches absent.............................................................................. Hydnodiaetus

3b Mesosternum between mesocoxae nearly vertical, not impressed; metasternum not foveate; body broadly oval, about 1.5 x as long as wide, very convex; apical elytral-abdominal binding patches present near middle of terga VI – VII....... Anaballetus