Caryocolum arenariella (Benander, 1937)

(Fig. 1)

Records. HUEMER et al. (2017, as C. schleichi Christoph, 1872).

Material examined. RUSSIA: ALTAI REPUBLIC: Ulagan district, 11 km NNW of Aktash vill., 1.900 m a.s.l., 50°24′49.22″N, 87°34′21.42″E, 28.–30.vii.2016, 8, P. Huemer & B. Wiesmair leg. (TLMF); Ulagan district, 10 km NE Aktash village, Kuraj Mts range, between Korumdyajry and Yarlyamry rivers, 2150 m a.s.l., 50°19′N, 87°43′E, 6.–8.viii.2016, 11 1 ♀, P. Huemer & B. Wiesmair leg.(TLMF); Kosh-Agach district, 17 km NNE of Kokorya, Chikhacheva Mountains Range, Talduair Mountains, Sajlyugem valley, 2.200 m a.s.l., 50°1′15.37″N, 89°13′43.65″E, 30.vii.–2.viii.2016, 13 (gen.slide GEL 1259, GEL 1260, P. Huemer) (Barcode TLMF Lep 20329, Barcode TLMF Lep 20330, Barcode TLMF Lep 20331), P. Huemer & B.Wiesmair leg. (TLMF); Kosh-Agach district, 10 km NE of Kosh-Agach, Kurai Mountains Range, Tabozhok valley, 2.100 m a.s.l., 50°4′32.36″N, 88°43′41.83″E, 2.–4.viii.2016, 1 (Barcode KLM Lep 06375), C.Wieser leg. (LMK); Belyashi env. (56 km SE), 49°39′45″N, 88°14′28″E, Dzhazator valley, mountain meadows near Tara river, 2300 m, 25.–26.vii.2017, 17 (Barcode NMPC-LEP-0370), J. Šumpich leg. (NMPC); Belyashi (Dzhazator) env. (25 km NW), confluence of Argut and Karagem rivers, 49°51′56″N, 87°10′22″E, rocky steppe, 1400 m, 27.–28.vii.2017, 7 1 ♀, J. Šumpich leg. (NMPC).

Molecular data. BIN BOLD: AAE9479 (n = 10, 5 public, 5 from the Altai). The average intraspecific divergence of the barcode region is 0.6% (maximum 1.31%). The nearest neighbour is C. schleichi (Christoph, 1872) with 2.25% p-distance.

Distribution. Europe: southern Scandinavia, the Baltic countries, Macedonia, Mongolia, Russia: the Altai Republic, Zabaikalskiy krai, Middle Amur (HUEMER & KARSHOLT 2010, PONOMARENKO 2016, HUEMER et al. 2017).

Remark. Until recently, Caryocolum arenariella was treated as a subspecies of C. schleichi (Christoph, 1872) . Based on a recent study it was re-elevated to the species level (AARVIK et al. 2017).