Blue-black earth bug
| Blue-black earth bug | ||||||||||||
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Blue-black earth bug ( Canthophorus dubius ) |
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| Scientific name | ||||||||||||
| Canthophorus dubius | ||||||||||||
| ( Scopoli , 1763) |
The blue-black earth bug ( Canthophorus dubius ) is a bug belonging to the class of insects from the family of earth bugs (Cydnidae).
features
The bugs are 6.0 to 8.0 millimeters long. They are colored glossy black and can also have a metallic blue, green or purple tinge. They have a white border on the pronotum and on the corium of the hemielytras as well as an alternating white and black colored connexive . The species can only be distinguished from the very similar Canthophorus impressus through genital morphological investigations. The blue-black earth bug, however, has only a hinted transverse furrow on the pronotum and its frontal plate is less arched. The second part of the antennae is almost as long as the third. The membranes of the hemielytres are milky.
distribution and habitat
The species is distributed from the Mediterranean region to the south of the British Isles and the south of Scandinavia, and east to Siberia and Central Asia. In Germany it is more common, especially in the south, but only occurs occasionally. In the northeast it is only known from individual finds, it does not occur in the northwest. In the Alps you can find them up to over 1000 meters above sea level. Different open, dry and warm habitats are settled, in particular limestone or sandy grasslands. The species needs more warmth than Canthophorus impressus .
Way of life
Like Canthophorus impressus , with which it can also appear in association, the species lives on flax leaf species ( Thesium ), such as alpine flax leaf ( Thesium alpinum ), middle flax leaf ( Thesium linophyllon ) and meadow flax leaf ( Thesium pyrenaicum ). They suck on the parts of the plants above ground as well as on the root necks . The hibernation occurs as an adult bug under leaves and in moss near the food plants. The animals can sometimes also form large aggregations. Mating takes place in May and June on the food plants. The nymphs appear from June to August, the adults of the new generation from July.
supporting documents
Individual evidence
- ↑ a b c Wachmann: Wanzen , Vol. 4, p. 15
- ↑ Frieder Sauer: Sauer's nature guide recognized bugs and cicadas from color photos . Fauna, Keltern 1996, ISBN 3-923010-12-5 , p. 34 .
- ^ Canthophorus impressus. British Bugs, accessed June 13, 2015 .
literature
- Ekkehard Wachmann , Albert Melber, Jürgen Deckert: Bugs. Volume 4: Pentatomomorpha II: Pentatomoidea: Cydnidae, Thyreocoridae, Plataspidae, Acanthosomatidae, Scutelleridae, Pentatomidae. (= The animal world of Germany and the adjacent parts of the sea according to their characteristics and their way of life . 81st part). Goecke & Evers, Keltern 2008, ISBN 978-3-937783-36-9 .
- Frieder Sauer: Sauer's nature guide recognized bugs and cicadas from color photos . Fauna, Keltern 1996, ISBN 3-923010-12-5 .
Web links
- Canthophorus dubius at Fauna Europaea. Retrieved June 13, 2015