Paraclytus excultus Bates, 1884


Paraclytus excultus
[Photo © D.Navrátil & 8K postprocessing M.Hoskovec]

Paraclytus excultus, a stricly insular species occuring in southern Kurile islands and Japan only, has been described by Henry Walter Bates in 1884 [❖]. Species inhabits broad-leaved and mixed forests of varying density. Emergence of adults begins in first half May and continues to August. During this period beetles can be found on the host trees, rarely visit flowers. Females lay eggs laid in bark and wood crevices on thick trunks of standing but dead or dying trees, sometimes on dry branches of viable deciduous trees. Larvae create longitudinal galleries in the wood from bottom upward at a depth up to 5.0 cm and fill them compactly with fine frass. Pupal cells, located in upper layer of wood, are created at end of gallery in July-August (after the first or second over wintwring) longitudinal to trunk. Young adults hatch in the second half of August and in September and overwinter in pupal cells until first warm weeks of the next spring (depends on the locality, May/June). Life cycle two or three years. [✧].

Body length:11 - 14 mm
Life cycle:2 - 3 years
Adults in:May - August
Host plant:polyphagous in deciduous trees (Phellodendron, Acer, Alnus, Sorbus, Morus, Fagus, Quercus, Zelkova)
Distribution:Japan (Hokkaido, Honshu, Shikoku, Kyushu) and Kuriles (Iturup, Kunashir)

The depicted beetles were collected in Makabemachi-hatori (462 m a.s.l., Mt. Tsukuba, Sakuragawa city environs, Ibaraki prefecture, Kantō region, Honshu island, Japan) on May 10, 2020.

Collected by Shuhei Fuda

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 18: 205-262, 1884 [download pdf icon]

Miroshnikov A.I.:
A review of the genus Paraclytus Bates, 1884, with the description of a new species from China (Coleoptera: Cerambycidae).
Konstantinov A. S., Slipinski S. A. & Solodovnikov A. Yu. (Editors): Advances in studies on Asian cerambycids, KMK Scientific Press Ltd., ISBN 978-5-87317-820-9, 73-132, 2014. [download pdf icon]

Cherepanov A.I.:
Cerambycidae of Northern Asia, Volume 2 - Cerambycinae Part II.
Amerind Publishing, New Delhi: 354pp [pages 139-145], 1988. [download pdf icon]

SubfamiliaCerambycinae Latreille, 1802
TribusAnaglyptini Lacordaire, 1868
GenusParaclytus Bates, 1884
SpeciesParaclytus excultus Bates, 1884