title: Further karyosystematic studies of the Boreonectesgriseostriatus (De Geer) group of sibling species (Coleoptera, Dytiscidae)-characterisation of B.emmerichi (Falkenström, 1936) and additional European data.
abstract: A lectotype is designated for the Tibetan species Deronectesemmerichi Falkenström, 1936 (Currently Boreonectesemmerichi (Falkenström)), and its habitus, as well as the median lobe and parameres of its aedeagus, are figured along with additional comparative material. Material of Boreonectesemmerichi from Sikkim (BMNH) represents the first record of a Boreonectes Angus, 2010 species from India. The karyotype of Boreonectesemmerichi is described as having 26 pairs of autosomes plus sex chromosomes which are X0 (♂), XX (♀). The karyotype is most like that of Boreonectesmacedonicus (Géuorguiev, 1959), but with slight differences. Additional chromosomal information is given for Boreonectesgriseostriatusgriseostriatus (De Geer, 1774) in the French Alps, Boreonectesgriseostriatusstrandi (Brinck, 1943) on the Kola Peninsula, Boreonectesmultilineatus (Falkenström, 1922) in the Pyrenees and Boreonectesibericus (Dutton & Angus, 2007) in the Spanish Picos de Europa.
authors.affiliation: Department of Life Sciences (Entomology), The Natural History Museum, Cromwell Road, London SW7 5BD, UK.
authors.forename: Robert B
authors.initials: RB
authors.lastname: Angus
authors.affiliation: Biomedical Imaging Unit, Level B South Block, Mail point 12, General Hospital, Southampton SO16 6YD, UK.
authors.forename: Elizabeth M
authors.initials: EM
authors.lastname: Angus
authors.affiliation: Institute of Entomology, Life Science School, Sun Yat-sen University, Guangzhou, 510275, Guangdong, China.
authors.forename: Fenglong
authors.initials: F
authors.lastname: Jia
authors.affiliation: Biology and Geography School, Qinghai Normal University, Wusi West Road 38#, 81000, Xining, Qinghai Province, China.
authors.forename: Zhen-Ning
authors.initials: ZN
authors.lastname: Chen
authors.affiliation: Biology and Geography School, Qinghai Normal University, Wusi West Road 38#, 81000, Xining, Qinghai Province, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
keywords: C-banding; Coleoptera; Dytiscidae; Karyotype; Sikkim; Tibet; first record from India; lectotype; species complex