Amarysius altajensis, a beautiful North Asian species known from China, Kazakhstan, Korea, Mongolia and Russia, has been described from "Altai Mts." (West Siberia) as Leptura altajensis by Erich Laxmann in 1770 [▽]. A. altajensis larvae develop in living twigs and thin branches of plethora deciduous trees (e.g. Acer, Quercus, Crataegus, Tilia, Juglans, Prunus, Fraxinus, Salix) [✮]. Adults, active in June and July, are diurnal and anthophilous [✮].

Its Eastern subspecies A. altajensis coreanus, occuring in China, Korea, Mongolia and Russian Far East, has been described from Jeju Island (also known under historic names Quelpart Island or Saishiu-to, South Korea) by Hanjiro Okamoto in 1924 [✳].

Body length:	9.5 – 18 mm
Life cycle:	2 - 3 years
Adults in:	May - July (depends on region)
Host plant:	polyphagous in deciduous trees (Acer, Quercus, Crataegus, Tilia, Juglans, Prunus, Fraxinus, Salix etc.)
Distribution:	China, Kazakhstan, Mongolia, Russia (West Siberia)

The depicted mounted male beetle was collected on Chonma-san (천마산/天摩山) mountain (Ahobiryong Mts., North Hwanghae province, North Korea) on June 7-9, 1996.

Collected by Jaroslav Dalihod

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[▽]
Laxmann E.:
Novae Insectorum species.
Novi commentarii Academiae Scientiarum Imperialis Petropolitanae 14 (1): 593-604, 1770. [download ]

[✳]
Okamoto H.:
The insect fauna of Quelpart Island (Saishiu-to).
Bulletin of the Agricultural Experimental Station, Government-General lof Chosen (Suigen) 1 (2): iii-iv + 47-233, 1924.

[✮]
Cherepanov A.I.:
Cerambycidae of Northern Asia, Volume 2 - Cerambycinae Part II.
Amerind Publishing, New Delhi: 354pp [pages 325-330], 1988. [download ]

Karpiński L., Szczepański W.T., Boldgiv B. and Walczak M.:
New data on the longhorn beetles of Mongolia with particular emphasis on the genus Eodorcadion Breuning, 1947 (Coleoptera, Cerambycidae).
ZooKeys 739: 107-150, 2018. [download ]