Xylotrechus (Xylotrechus) clarinus Bates, 1884

Subfamilia: CERAMBYCINAE  /  Tribus: CLYTINI
Xylotrechus clarinus
[Photo © David Navrátil and Kirill V. Makarov, click on the picture for 4K resolution]

Xylotrechus clarinus, a species occuring in the Kuril Islands (Kunashir) and Japan, has ben described from Japan by Henry Walter Bates in 1884 [▽]. X. clarinus, the sister species of Xylotrechus (Xylotrechus) ibex (Gebler, 1825), is ecologically connected with Betulaceae, predominatly with birches (Betula spp.). Female lay eggs to trunks of dying or freshly fallen birch trees. Larvae feed subcortically, create meandering shallow galleries filled with frass containing bark. Larvae of the last instar create pupal cells in bark at end of the gallery. Life cycle 2 years, adults are active from June to September and can be found on the host trees [❖].

Body length:12 - 13 mm
Life cycle:2 years
Adults in:June - September
Host plant:predominantly in birches (Betula costata, B. ermani, B. grossa, B. maximowicziana, B. platyphylla), from Japan reported in Alnus
Distribution:Russian Far East (Kuril Islands - Kunashir), Japan

The depicted beetles were collected: ♂ - in Arsenyev (Арсе́ньев) environs (Primorsky Krai, Far Eastern federal district, Russia) in July 1990; ♀ - on South slope of Alokhin Cape (Mыс Алёхина; N43°55′19″ E145°32′26″; Kurils Nature Reserve, Kunashir/Кунаши́р island, Kuril Islands, Yuzhno-Kurilsky district, Sakhalin region, Far Eastern federal district, Russia) in August 2009.

Collected by our friend Robert "Robin" Čermák and Kirill V. Makarov

Bates H.W.:
Longicorn beetles of Japan. Additions, chiefly from the later collections of Mr. George Lewis; and notes on the synonymy, distribution, and habits on the previously known species.
The Journal of the Linnean Society of London. Zoology 18: 205-262, 1884. [download pdf icon]

Cherepanov A.I.:
Cerambycidae of Northern Asia, Volume 2 - Cerambycinae Part II.
Amerind Publishing, New Delhi: 354pp [pages 50-54], 1988. [download pdf icon]

SubfamiliaCerambycinae Latreille, 1802
TribusClytini Mulsant, 1839
GenusXylotrechus Chevrolat, 1860
SubgenusXylotrechus Chevrolat, 1860
SpeciesXylotrechus (Xylotrechus) clarinus Bates, 1884