Pachybrachis morosus, Haldeman

Barney, Robert J., 2019, Key to All Sixty-Four Species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) in the Eastern USA, The Coleopterists Bulletin 73 (1), pp. 85-96 : 86

2. Upper surface distinctly pubescent ........... ..................... 36. P. morosus Haldeman

2 ʹ. Upper surface not distinctly pubescent……3

3. Elytra distinctly vittate ......................... 4

3 ʹ. Elytra not distinctly vittate .................. 13

4. Without apical spur on the anterior tibia…5

4 ʹ. With apical spur on the anterior tibia ........... 9

5. Ventral surface of median lobe with keel…6

5 ʹ. Ventral surface of median lobe without keel ................................................. 8