Pachybrachys stygicus, Fall

Barney, Robert J., 2018, Definition and Revision of the Atomarius Species-Group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae), Including Descriptions of Nine New Species, The Coleopterists Bulletin 72 (1), pp. 9-74 : 12

6. Median lobe with median orificial plate large and heavily sclerotized, conspicuous, shaped like an inverted ladle ( Fig. 5 ) ............................. 5. P. stygicus Fall

6 ʹ. Median lobe not as above .................. 7

Figures

Fig. 5. Pachybrachis stygicus. A) Dorsal habitus, B) Lateral habitus, C) Face, D) Pygidium, E) Median lobe of aedeagus, lateral view, F) Median lobe of aedeagus, en-face view.