Elaphrus trossulus Semenov, 1904

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 267

Elaphrus trossulus Semenov, 1904

Elaphrus trossulus Semenov, 1904: 21. Type locality: «Mongoliâ occid[entalis]: inter Ulan-daban et opp. Kobdo; syst. fl. Kobdo; syst. fl. Sansai; ad lac. Shar-nur" (original citation). Syntype(s) probably in ZILR.

Elaphrus parviceps Van Dyke, 1925: 112. Type locality: "Teller, Seward Peninsula, Alaska" (original citation). Holotype (♀) in CAS [# 1617]. Synonymy established by Goulet and Smetana (1997: 204).

Distribution.

This species is found in the montane regions of northern Mongolia and neighbouring Russia west and south of Lake Baikal, in northeastern Siberia, and in the arctic regions from the Commander Islands in the Bering Sea to the eastern shore of James Bay in Quebec (Morgan and Pilny 1997: 146) [see Goulet 1983: Fig. 171]. Fossil remnants of this species, dated between 10,100 and 11,050 years old, have been found in southern Quebec (Mott et al. 1981: 146); others, older than 33,000 years B.P., has been unearthed in southwestern Ontario (Warner et al. 1988: 37).

Records.

CAN: MB, NT, NU, ON, QC, YT USA: AK - Holarctic

Note.

According to Shilenkov (in Kryzhanovskij et al. 1995: 61), the type material of Elaphrus trossulus Semenov is conspecific with members of Elaphrus tuberculatus Mäklin. However, Goulet and Smetana (1997: 203) concluded that adults of Elaphrus trossulus and Elaphrus parviceps Van Dyke "cannot be separated." Lindroth (1961a: 116) regarded Elaphrus parviceps as a junior synonym of Elaphrus riparius (Linnaeus), a species restricted to the Palaearctic Region according to Goulet (1983: 313).