(Fig. 160 in Strand & Vik 1964; Figs. 164–167 in Lohse et al. 1990 (as Dimetrota))
Atheta (Dimetrota) altaica Bernhauer, 1901: 109.
Atheta (Dimetrota) altaica: Bernhauer & Scheerpeltz, 1926: 662 (as valid species).
Atheta (s. str.) altaica: Strand & Vik, 1964: 329 (as valid species).
Dimetrota altaica: Lohse et al., 1990: 185 (as valid species).
(Other references are omitted)
Type material. Lectotype of Atheta altaica (here designated): ♂, “Altaigebirge Mittelsibirien”, orange square, “ altaica Brnh. leg. Leder. Reitter. Type ” (yellow label), white square, “Chicago NHMus M.Bernhauer Collection ” (FMNH). Paralectotype: ♂, white square, “ Altaigebirge leg. Leder ”, “ altaica Brh. Type. det. Reitter ” (yellow label), “Chicago NHMus M.Bernhauer Collection ” (FMNH).
Additional material: UNITED STATES: Alaska: 2♂♂, Kenai Peninsula, Anchor River at Hwy. 1, 450’, 4.vi.1978 (Smetana & Becker); ♂, Kenai Peninsula, Clam Gulch, 6.vi.1978 (Smetana & Becker); 2♀♀, Kenai Mts., 2 mi. S Moose Pass, 500’, 30.v.1978 (A.Smetana & E.C.Becker); 18 specimens, Denali Hwy. Mi. 110, Seattle Creek, 15.vii.1978 (J.M.Campbell & A.Smetana); ♂, ♀, 12 mi. N Denali Hwy. Mi. 78, Windy Creek, 13.vii.1978 (Smetana & Campbell); ♀, Richardson Hwy. Mi. 206, Isabel Pass, 2900’, 16.vii.1962 (R.E.Leech); ♀, Prudhoe Bay Rd., S Fork Koyukuk River, 67º12’N 150º07’W, 1100’, 8.vii.1978 (Campbell & Smetana) (CNCI); CANADA: Northwest Territories: ♀, East Channel, MacKenzie Delta, 6.vii.1973 (CNCI); Yukon Territory: ♂, Dawson City, 16.vii.1968 (Campbell & Smetana); ♀, Dempster Hwy. Mi. 48.5, North Fork Pass, 4100’, 19.vii.1978 (J.M.Campbell & A. Smetana); 2♂♂, ♀, Dempster Hwy. Mi. 45, 3400’, 18–23.vii.1978 (J.M.Campbell); 2♂♂, 3♀♀, Dempster Hwy. Mi. 42, North Klondike River, 3300’, 18.vii.1978 (Smetana & Campbell); 2♂♂, ♀, Mi. 1034 Alaska Hwy., Nr. Kloo Lake, 5.vii.1968 (Campbell & Smetana) (CNCI).
Diagnosis. See Lohse et al. (1990; as Dimetrota).
Discussion. To clarify the status of Atheta altaica and At. picipennis, the types of both species were examined. The types of At. altaica correspond to the accepted concept of this species (e. g., Strand & Vik 1964; Lohse et al. 1990).
Distribution. Atheta altaica has a circumpolar distribution. In North America it is known from Alaska, Yukon Territory, Northwest Territories and Labrador (Lohse et al. 1990).