Asemum striatum (Linnaeus, 1758)
[= Asemum subsulcatum Motschulsky, 1860]
[= Asemum striatum amurense Kraatz, 1879]
[= Asemum striatum japonicum Matsushita, 1933]

Subfamilia: SPONDYLIDINAE  /  Tribus: ASEMINI
Asemum striatum
[Photo © Udo Schmidt]

Asemum striatum is a Holoarctic, in Europe common species developing in coniferous trees (Picea, Abies, Larix, but primarily in Pinus). A. striatum larvae develop in the wood of stumps, root collars and in the lower parts of trunks of freshly dead or dying trees. The larvae feed first subcortically and then enter the wood. Later instars larval galleries are bored in wood, but often return to its surface. Galleries are quite similar to the genus Arhopalus. The life cycle is at least two years. Adults, active from May to August, are crepuscular/nocturnal and vcan be found on the host trees or attracted by light [✱][✧][✮]. A. striatum is a relatively variable species in terms of color, usually the adults are all dark (black), less common are the adults with brown elytra. Rarely they have light-colored legs.

Body length:♂♂ 8 - 18 mm / ♀♀ 12 - 23 mm
Life cycle:2 - 3 years
Adults in:May - August
Host plant:polyphagous in coniferous trees (Picea, Pinus, Abies, Larix, Pseudotsuga)
Distribution:almost the entire Holoarctic region, including the Nearctic (USA, Canada, Mexico), in the Palaearctica from Spain to Japan

Mounted specimen was collected in Dauria Kodori Mts. (Tshara, Transbaikalia, Russia) in summer 1991. The living beetle was photographed in Zadní Muňava forest area (Chyňava village environs, Křivoklátsko Protected Landscape Area, Central Bohemia, Czechia) on May 8, 2020.

Collected by Igor Kostjuk and Daniel Rydzi

Sláma M.E.F.:
Tesaříkovití – Cerambycidae České republiky a Slovenské republiky / Cerambycidae of the Czech Republic and Slovak Republic.
Milan Sláma private printing, Krhanice, 383pp [page 83], 1998 [ISBN: 80-238-2627-1]. [download pdf icon]

Cherepanov A.I.:
Cerambycidae of Northern Asia, Volume 1 - Prioninae, Disteniinae, Lepturinae, Aseminae.
Amerind Publishing, New Delhi: 304pp [pages 585-590], 1988. [download pdf icon]

Danilevsky M.L.:
Longicorn beetles (Coleoptera, Cerambycoidea) of Russia and adjacent countries. Part 1.
Higher School Consulting, Moscow, 550pp [pages 369-371], 2014. [download pdf icon]

Asemum striatum
Asemum striatum
[Photo © Daniel Rydzi]

SubfamiliaSpondylidinae Audinet-Serville, 1832
TribusAsemini Thomson, 1860
GenusAsemum Eschscholtz, 1830
SpeciesAsemum striatum (Linnaeus, 1758)