Abstract
A lectotype is designated for the Tibetan species Deronectes emmerichi Falkenström, 1936 (Currently Boreonectes emmerichi (Falkenström)), and its habitus, as well as the median lobe and parameres of its aedeagus, are figured along with additional comparative material. Material of Boreonectes emmerichi from Sikkim (BMNH) represents the first record of a Boreonectes Angus, 2010 species from India. The karyotype of Boreonectes emmerichi is described as having 26 pairs of autosomes plus sex chromosomes which are X0 (♂), XX (♀). The karyotype is most like that of Boreonectes macedonicus (Géuorguiev, 1959), but with slight differences. Additional chromosomal information is given for Boreonectes griseostriatus griseostriatus (De Geer, 1774) in the French Alps, Boreonectes griseostriatus strandi (Brinck, 1943) on the Kola Peninsula, Boreonectes multilineatus (Falkenström, 1922) in the Pyrenees and Boreonectes ibericus (Dutton & Angus, 2007) in the Spanish Picos de Europa.
Highlights
The group of species related to Boreonectes griseostriatus (De Geer, 1774) presents serious taxonomic problems
Zaitzev (1953) in the Israeli English translation (1972) noted that “This species (B. griseostriatus) varies markedly in many characters; all attempts to establish subspecies and varieties are unjustified, because almost all varieties are connected by transitions.”
The intact male is here designated lectotype, so the type locality is fixed as Tatsienlu Tjiji, 29°59.906'N, 101°57.492'E
Summary
The group of species related to Boreonectes griseostriatus (De Geer, 1774) presents serious taxonomic problems. Helliesen (1890), working in Norway, recognised an inland montane stripy form, which he regarded as true griseostriatus, and a coastal, more blotchy form, which he named maritimus sp. n. Falkenström (1922) showed that De Geer’s griseostriatus referred to the coastal form, and described the inland form as Deronectes multilineatus Falkenström, 1922. Material from more open areas of the Tibetan Plateau, from Gangca in the north to Nam Tso in the south, has the dark markings less extensive, especially on the pronotum (Fig. 1e–h).
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