Exocentrus (Exocentrus) stierlini Ganglbauer, 1883

Subfamilia: LAMIINAE  /  Tribus: ACANTHOCININI
Exocentrus stierlini
[Photo © P.Jelínek]

Exocentrus stierlini is ecologically associated with willows (Salix spp.). Beetles fly from June through August. They infest thin shoots 0.6-2.2 cm diameter of viable and decaying willow trees. Larvae hatching from eggs bore into wood, leaving small inlet on surface, and plug it with fine frass. Longitudinal galleries are usually made in upper layer of wood (in this case, undamaged wood up to 1.0 mm thick remains between gallery and bark), more rarely to a depth up to 5.0 cm. Length of gallery in wood up to 9.5 cm or more, width 2.0-2.5 mm. Galleries sometimes deepen into wood, sometimes approach shoot surface. Before pupation, larvae make a pupal cell in the upper wood layer longitudinal to the shoot with an exit almost up to the bark. Length of cell 7-12 mm, width 3.5-4.0 mm [❖].

Body length:4 - 6 mm
Life cycle:1-2 years
Adults in:June - August
Host plant:willows (Salix spp.)
Distribution: Central and Eastern Europe, Russia, Kazakhstan

The depicted beetles were beaten from thin dead twigs of a willow (Salix sp.) found in Altaı (formerly Zyryanovsk or Зырян/Zyrıan) environs, East Kazakhstan in June 2019.

Collected by Jiří Kadlec

Cherepanov A. I.:
Cerambycidae of Northern Asia, Volume 3: Lamiinae (Part I)
E. J. Brill, Leiden, 1990, pp. 187-192.

Karpiński L., Szczepański W.T., Plewa R., Walczak M., Hilszczański J., Kruszelnicki L., Łoś K., Jaworski T., Bidas M., Tarwacki G.:
New data on the distribution, biology and ecology of the longhorn beetles from the area of South and East Kazakhstan (Coleoptera, Cerambycidae)
ZooKeys 805: 59–126 (2018) [download pdf icon]

Exocentrus stierlini
Exocentrus stierlini
Exocentrus stierlini
Exocentrus stierlini
Exocentrus stierlini
[Photo © P.Jelínek]

Subfamilia: Lamiinae Latreille, 1825
Tribus: Acanthocinini Blanchard, 1845
Genus: Exocentrus Dejean, 1835
Subgenus: Exocentrus Dejean, 1835
Species: Exocentrus (Exocentrus) stierlini Ganglbauer, 1883