Stenostola dubia (Laicharting, 1784)

Subfamilia: LAMIINAE  /  Tribus: SAPERDINI
Stenostola dubia
[Photo © David Navrátil & 8K postprocessing M.Hoskovec]

Stenostola dubia, a widely distributed European species developing in deciduous trees, has been described as Saperda dubia from Tyrol by Johann Nepomuk Laicharting in 1784 [✧]. The S. dubia larvae develop in dead thicker twigs, branches and slender stems (up to 20 cm in diameter) of deciduous trees (Tilia cordata is a preferred host, but often can be found in other deciduous trees). Unlike the sister species S. ferrea (Schrank, 1776), S. dubia has probably a less strict demand to the quality of substrate and tolerate more humid wood. Larvae feed subcortically with galleries usually made only in the bark while the sapwood remains intact, with the exception of wood with a very thin bark. The mature larvae create a typical hook-shaped pupal cell in the wood. If the bark is thick, the pupation may take place in the bark. Pupation in spring, the life-cycle is one to two years. Adults, active from from late spring to summer, feed on the leaves and fresh bark of the host trees [❖]. S. dubia and S. ferrea are often confused or misidentified, although they are two well-separated species differing in both morphology of adults (especially genitalia) and developmental stages, DNA markers, and bionomy. All these aspects were brilliantly described in the works of Torstein Kvamme, Henrik Wallin and Kersti S. Kvie [❖][★].

Body length:8 - 14 mm
Life cycle:1 - 2 years
Adults in:May - July
Host plant:polyphagous in deciduous trees (Tilia, Quercus, Fraxinus, Juglans, Corylus, Salix, Populus, Rhamnus, Alnus, Castanea, Ulmus, etc.)
Distribution:Austria, Belgium, Bosnia and Herzegovina, Croatia, Czechia, Denmark, Finland, France, Germany, Hungary, Italy, Latvia, Lithuania, Luxembourg, Moldova, Norway, Poland, Romania, Russia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom

The depicted mounted beetles were found in: ♂ - Týnišťko environs (Ústí nad Orlicí district, Pardubice region, East Bohemia, Czechia) on April 30, 2005; ♀ - Pouzdřany environs (Břeclav district, South Moravia, Czechia) on May 15, 2004.

Collected by D.Navrátil

Laicharting J.N.:
Verzeichniss und Beschreibung der Tyrolen-Insecten.
Zürich, Johann Caspar Füessly, 2 (1): v-xiv + 176pp, 1784. [download pdf icon]

Kvamme T. and Wallin H.
The genus Stenostola Dejean, 1835 (Coleoptera, Cerambycidae) in Norway, with a review of the biology and the distribution in Fennoscandia.
Norwegian Journal of Entomology 58, 93–108, 2011. [download pdf icon]

Kvamme T., Wallin H. and Kvie K.S.:
Taxonomy and DNA barcoding of Stenostola ferrea (Schrank, 1776) and S. dubia (Laicharting, 1784) (Coleoptera, Cerambycidae, Saperdini).
Norwegian Journal of Entomology 59, 78–87, 2012. [download pdf icon]

SubfamiliaLamiinae Latreille, 1825
TribusSaperdini Mulsant, 1839
GenusStenostola Dejean, 1835
SpeciesStenostola dubia (Laicharting, 1784)