Couplet 12
12a: Antenna with strongly asymmetrical, usually lamellate club of 3-8 antennomeres (Figure 26-6C-G); fore coxa large, strongly transverse or conical and projecting below prosternum; fore coxal cavity closed; trochantin concealed (except in Diphyllostomatidae); fore tibia flattened, with 1 or more teeth on outer edge; tarsi with 5 distinct tarsomeres, none of which are lobed or densely pubescent
12b: Antenna not lamellate, or coxa, tibia, or tarsi not as in preceding entry
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