Key to males of Pachyphloea species

1. Vertex extensions notably elevated on two foliaceous branches. Posterior margin of pronotum with marked spinous extensions, being two to three times the length of the scape and pedicel.................................................... 2

- Vertex extensions reduced to a pair of tubercles. Posterior margin of pronotum presents non-spinous foliaceous extensions, presenting a length equal to that of the scape and pedicel together................................. P. magnoliae n. sp.

2. Abdomen is spinose dorsally, the dorsal midline is slightly elevated............................... P. punana n. comb.

- Abdomen is unarmed dorsally, the body with a conspicuously elevated central carina................ P. minima n. comb.