Brachyxystus Faust 1897

GenusBrachyxystusFaust, 1897, reestablished tribal placement Brachyxystus Faust, 1897: 355, type species by original monotypy Brachyxystus subsignatus Faust, 1897 (classified as Phyllobiini); Marshall 1916: 279 (classified as Ectemnorhinini Lacordaire, 1863); Thompson 1977: 460 (classified as Polydrusini); Alonso-Zarazaga and Lyal 1999: 173 (classified as Phyllobiini). Notes. The major characteristic of Polydrusini that differentiates it from Phyllobiini is the lateral position of the antennal scrobes. We agree with the conclusion of Thompson (1977), who conducted a comparative morphological analysis and proved affinity of Brachyxystus with Pachyrhinus Schoenherr, 1823 and its placement in Polydrusini. We disagree with Alonso-Zarazaga and Lyal (1999) who transferred the genus to Phyllobiini without explicit justification. In addition to the morphology of the head, the structure of the aedeagus also supports the affinity of Brachyxystus with Pachyrhinus within Polydrusini.