Clytus (Clytus) tropicus (Panzer, 1795)

Subfamilia: CERAMBYCINAE  /  Tribus: CLYTINI
Clytus tropicus
[Photo © Daniel Rydzi]

This beautiful and rare European species developing in oaks (Quercus spp.) has been described from Germany as Callidium tropicum by Georg Wolfgang Franz Panzer in 1795 [❖]. C. tropicus is a species of well-preserved, naturally rich xerothermic oak forests in lower altitudes. The female lays eggs in trunks and branches of standing weakened, dying or freshly dead standing oaks. The larvae form long, mostly more direct galleries at the interface of bark and sapwood. The length of the gallery under the bark reaches 50 - 80 cm. The late instar larvae enter the wood, where they create 10 - 25 cm long corridor finished by a pupal cell with a preformed exit hole clogged by fine sawdust. If the bark is thick, the larva does not have to enter the wood and pupates in/under the bark. Older trees are attacked mainly in branches, younger ones in trunks, already low above the ground [✧].

Body length:10 - 20 mm
Life cycle:1 - 2 years
Adults in:May - July
Host plant:oaks (Quercus spp.)
Distribution:Austria, Belorussia, Bosnia-Herzegovina, Bulgaria, Croatia, Czechia, France, Germany, Greece, Hungary, Macedonia, Moldova, Poland, Romania, Serbia, Slovakia, Spain, Switzerland, Ukraine, European Turkey, European Russia

The depicted mounted beetles were reared from larvae collected under the bark of dead standing oak trunk found in Kutná Hora - Kaňk (Central Bohemia, Czechia) in winter 1995. The living specimens were collected in: (ML) - Sýkořice village environs (Křivoklátsko Protected Landscape Area, Rakovník district, Central Bohemia, Czechia) on May 12, 2022; (DR) - Zálesí village environs (Znojmo district, South Moravia, Czechia) on May 20, 2018.

Collected by Michal Hoskovec, Miroslav Polcar and Daniel Rydzi

Panzer G.W.F.:
Deutschlands Insecten-Fauna oder entomologisches Taschenbuch für das Jahr 1795.
Nürnberg, Felssecker 8: 368pp, 1795. [download pdf icon]

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 [pages 177-179], 1998 [ISBN: 80-238-2627-1]. [download pdf icon]

Clytus tropicus
[Photo © Michal Hoskovec]

[Photo © Milan Lovětínský]

[Photo © Daniel Rydzi]

[Photo © Daniel Rydzi]

SubfamiliaCerambycinae Latreille, 1802
TribusClytini Mulsant, 1839
GenusClytus Laicharting, 1784
SubgenusClytus Laicharting, 1784
SpeciesClytus (Clytus) tropicus (Panzer, 1795)