Pseudocossonus

Omar, Youssef Mohamed, Zhang, Runzhi & Davis, Steven R., 2006, Descriptions of two new species of Pseudocossonus Wollaston (Coleoptera: Curculionidae: Cossoninae) from mainland China with a key to the world species, Zootaxa 1375, pp. 59-68 : 60

Key to the species of Pseudocossonus

1. Elytron with a fine basal carina between suture and stria 4; rostrum not widened beyond point of antennal insertion ( Japan)............................... P. brachypus Wollaston Elytron without basal carina; rostrum slightly widened just beyond point of antennal insertion......................................................................................................................... 2 2. Dorsum transversely convex or only slightly flattened and/or punctures on sides of pronotum not or barely larger and slightly denser than those on disc of pronotum...... 3 Dorsum obviously flattened and punctures on sides of pronotum clearly larger and denser than those on disc of pronotum.......................................................................... 4