Monochamus impluviatus impluviatus (Motschulsky, 1859)

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 : 126

Monochamus impluviatus impluviatus (Motschulsky, 1859) Figs 5D, E , 15F

Material examined.

Töv Aimag: 75 km NE of Ulaanbaatar (48°10'N, 107°55'E), 1589 m a.s.l., 30 VII 2015 (1 II 2016, ex cult), 1♂, 1♀, from Larix sibirica , leg. MW ; 80 km NE of Ulaanbaatar (48°13'N, 107°43'E), 1778 m a.s.l., 31 VII 2015, 1♀, leg. WTS .

Remarks.

This is a Siberian species that is distributed from Ural to the Far East, including northern Mongolia, China, and North Korea ( Sama 2002, Danilevsky 2017a). Monochamus impluviatus is a comparatively rare species that feeds exclusively on larch Larix . One generation takes two years to complete. The imagines are active from June to the first half of August. The species is sometimes found sympatrically with Acanthocinus carinulatus Gebler, 1833 and Rhagium inquisitor (Linnaeus, 1758) ( Cherepanov 1990c).

Two specimens were also recorded from Bulgan Aimag by Heyrovský (1967a).

A single female (Fig. 15F ) was found moving on the ground under a larch tree (Fig. 15G ). One couple was additionally reared from a branch of a fallen Larix sibirica collected in forest steppe habitat (Fig. 7D ). The same material was inhabited by larvae of Clytus arietoides and Monochamus sutor .

Figures

Figure 5. Photos of longhorn beetles specimens collected during the expedition to Mongolia in 2015: A Aegomorphus obscurior (male) B Mesosa myops (male) C M. myops (female) D Monochamus impluviatus impluviatus (male) E M. impluviatus impluviatus (female) F Monochamus sutor longulus (female) G Monochamus sartor urussovii (male) H Agapanthia pilicornis pilicornis (male).

Figure 7. Field photos of immature stages and habitats of typical Mongolian cerambycid species: A larches in forest steppe, the habitat of Lepturalia nigripes rufipennis B larva of L. nigripes in a birch stump C site in light taiga, the habitat of L. nigripes rufipennis and Agapanthia pilicornis pilicornis D site in forest steppe, the habitat of Clytus arietoides, Monochamus impluviatus impluviatus and M. sutor longulus E broken trunk of the birch in light taiga, the microhabitat of inter alia Xylotrechus hircus and Aegomorphus obscurior F birches in light taiga, the habitat of X. hircus, A. obscurior, Saperda scalaris hieroglyphica and Mesosa myops G larva of Xylotrechus pantherinus H larva of X. pantherinus deep in the wood of a standing willow trunk.

Figure 15. Field photos of imagines in nature and habitats of typical Mongolian cerambycid species: A male of Eodorcadion humerale impluviatum (typical form) B male of E. humerale impluviatum (Khentey Mountains) C male of E. humerale impluviatum (Khentey Mountains, entirely black elytra form) D pair of E. humerale impluviatum in copula (Khentey Mountains) E detailed view of the habitat of E. humerale impluviatum (Khentey Mountains) F female of Monochamus impluviatus impluviatus G larches in forest steppe, the habitat of M. impluviatus impluviatus H various species of coniferous trees and birches in dark taiga, the habitat of Monochamus sartor urussovii.