Anastrangalia sequensi (Reitter, 1898)

Karpinski, Lech, Szczepanski, Wojciech T., Boldgiv, Bazartseren & Walczak, Marcin, 2018, New data on the longhorn beetles of Mongolia with particular emphasis on the genus Eodorcadion Breuning, 1947 (Coleoptera, Cerambycidae), ZooKeys 739, pp. 107-150 : 111

Anastrangalia sequensi (Reitter, 1898) Figs 1D-F , 6D

Material examined.

Töv Aimag: 70 km NE of Ulaanbaatar (47°57'N, 107°49'E), 1833 m a.s.l., 30 VII 2015, 2♂♂, on Seseli condensatum , leg. MW; 5♂♂ (2♂ melanistic form), on Seseli condensatum , leg. WTS; 1♀, on Seseli condensatum , leg. LK; 80 km NE of Ulaanbaatar (48°06'N, 107°50'E) (Fig. 6E ), 1538 m a.s.l., 31 VII 2015,1 ♀, on Apiaceae , leg. LK; 4♂♂, 2♀♀, on flowers near river, leg. MW; 80 km NE of Ulaanbaatar (48°13'N, 107°43'E), 1778 m a.s.l. , 31 VII 2015, 1♂, on Apiaceae , leg. LK; Selenge Aimag : 40 km NE of Zuunkharaa (48°57'N, 107°05'E), 1270 m a.s.l. , 04 VIII 2015, 3♀♀, on Chamaenerion angustifolium , leg. WTS; 35 km NE of Zuunkharaa (48°59'N, 106°55'E), 1399 m a.s.l. , 05 VIII 2015, 1♂, 1♀, on Apiaceae , leg. WTS; 1♂, on Apiaceae , leg. LK; Khentii Aimag : 40 km NE of Baganuur (47°51'N, 108°54'E), 1612 m a.s.l. , 22 VIII 2015, 1♂, leg. WTS.

Remarks.

This species is only distributed in northern Asia, where its range is from the Urals to the Pacific Ocean including Japan and in the south, it reaches northern Mongolia and China ( Cherepanov 1990a). Its flight period lasts from the end of May to the third week of August. After mating, the females lay eggs in the bark crevices of the stumps and trunks of various standing coniferous trees. The life cycle of this species usually lasts two years with pupation in spring and early summer ( Cherepanov 1990a).

Although it is one of the most common anthophilous species in Mongolia, it is distributed exclusively in the northern part of the country. The species is rather variable regarding the colour of the elytra, which ranges from brownish yellow to black. Entirely black specimens of A. sequensi might be confused with Anastrangalia renardi (Gebler, 1848), which differs mainly in its more parallel-sided elytra and their outer angles that are rounded.

Figures

Figure 1. Photos of longhorn beetles specimens collected during the expedition to Mongolia in 2015: A Gaurotes virginea aemula (female) B Stictoleptura variicornis (male) C S. variicornis (female) D Anastrangalia sequensi (male) E A. sequensi (male, melanistic form) F A. sequensi (female) G Pachyta lamed (male) H Lepturalia nigripes rufipennis (male) I Pachytodes longipes (female).

Figure 6. Field photos of imagines in nature, immature stages and habitats of typical Mongolian cerambycid species: A spruces, firs and birches in dark taiga, the habitat of Pachyta lamed, P. quadrimaculata and Lepturobosca virens B site with fireweed Chamaenerion angustifolium in dark taiga, the habitat of several anthopilous species e. g., Gaurotes virginea aemula, Stictoleptura variicornis C male of S. variicornis on Filipendula palmata D males of Anastrangalia sequensi on Seseli condensatum E larches in forest steppe, the habitat of A. sequensi F riverbank in light taiga, the habitat of Pachytodes longipes G larva of Oedecnema gebleri in larch wood H burned larches in forest steppe, the habitat of O. gebleri and A. sequensi.