Polydrusus (Eustolus), C. G. THOMSON, 1859

Yunakov, N. N. & Klass K. D., 2012, Contribution to the taxonomy and nomenclature of Entiminae from the Palaearctic region and South Africa (Coleoptera: Curculionidae), Beiträge Zur Entomologie = Contributions to Entomology 62 (2), pp. 427-445 : 433

Subgenus Eustolus C. G. THOMSON, 1859

[type species: Curculio flavipes DeGeer, 1775 ]

Tylodrusinus Reitter, 1916: 56 , syn. n.

[type species: Polydrusus julianus Reitter, 1916 ]

Taxonomic notes:

Reitter (1916) erected the subgenus Tylodrusinus for the single species Polydrusus julianus from the Xinjiang province of China ( Figs 3, 4 ). In general appearence its holotype differs from species of the subgenus Eustolus basically by the vestigial rather than extensive condition of shining metallic scales on the body. E. Reitter stressed this difference in the original description but did not provide any other significant evidence for the discrimination of Tylodrusinus . The structure of the head, pronotum, elytra, legs and abdomen agrees with that in Eustolus . There are no other particular characters suggesting Tylodrusinus to be classified as a distinct subgenus. Therefore P. julianus Rtt. is here transferred to the subgenus Eustolus C. G. Thomson, 1859 . In a discussion of this topic Dr. B. A. Korotyaev has agreed upon this synonymy.

Lectotype designation is required and here done because the original description was based on several specimens.

Type material:

Polydrusus julianus : Lectotype, female here designated ( MTMB): ‘Turkestan [printed]’ / ‘Kuldscha [printed]’ / ‘Kuldscha [hand written]’ / ‘julianus m. Fn. Grm V. [hand written]’ / ‘Coll. Reitter [printed] ’ / ‘ Holotypus Polydrusus julianus Reitter, 1916 [standard museum label in red frame]’ / ‘Lectotype Polydrusus julianus Reitter, Yunakov des., 2009 [red, printed]’.

Figures

Figs 1-4: Pimelorrhinus and Polydrusus, general view. Pimelorrhinus globatus Reitter, 1915 (= Ellimenistes setulosus Fåhraeus, 1871), holotype male. 1: dorsal view; 2: original labels and glueboard with dissected aedeagus and 9th sternite. Polydrusus julianus Reitter, 1916, holotype female. 3: dorsal view; 4: original labels.