title: Notes on the Metrocoris lituratus group (Heteroptera: Gerridae: Metrocoris) with descriptions of four new species in Sichuan Basin from China.
abstract: This paper provides the descriptions of four new species from eastern and southern regions of the Sichuan Basin in China: Metrocoris astictus sp. nov. and M. falciformis sp. nov. from Sichuan Province, M. guizhouensis sp. nov. and M. zhengi sp. nov. from Guizhou Province. M. sichuanensis Chen & Nieser, 1993 is currently transferred from the M. stali group to the M. lituratus group. A junior synonym M. bui Chen & Zettel, 1999 is proposed. Photographs of the male and female dorsal habitus and male genitalic structures are provided, accompanied by line drawings of male forelegs, endosomal structures and a distributional map of the newly described species. Finally, a key to the males of the species assigned to M. lituratus group is also provided to assist in identification.
authors.affiliation: College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, 300071, China; Email: unknown.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Ye
authors.affiliation: Naturalis Biodiversity Center, 2300 RA Leiden, The Netherlands; Email: unknown.
authors.forename: Ping-Ping
authors.initials: PP
authors.lastname: Chen
authors.affiliation: Institute of Entomology, College of Life Sciences, Nankai University, Tianjin, 300071, China; Email: wenjunbu@nankai.edu.cn.
authors.forename: Wen-Jun
authors.initials: WJ
authors.lastname: Bu
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D002681:China; D005260:Female; D020062:Heteroptera / Q000033:anatomy & histology* / Q000145:classification* / Q000254:growth & development; D008297:Male; D009929:Organ Size