Bidessus unistriatus
| Bidessus unistriatus | ||||||||||||
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Bidessus unistriatus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Bidessus unistriatus | ||||||||||||
| ( Closet , 1781) |
The swimming beetle Bidessus unistriatus is one of the smallest animals of the family with the 5 other species of the genus Bidessus that occur in Central Europe. With a size of only 1.75 - 2 mm, the inconspicuous beetles usually go unnoticed.
features
The antennae has nine sections, the last section being about twice the length of the rest, and converging to a point. Thorax and wing cover ocher-colored with an irregular, dark brown stripe along the wing cover seam, which in some animals runs in two to three incomplete transverse bands. In contrast to the head, which is speckled with dark brown, the thorax itself is predominantly ocher in color. The legs are also ocher in color, but become darker towards the outside.
Similar species
- Yellow-brown dwarf swimmer ( Guinotus pusillus )
- Smooth ball float ( Hyphydrus ovatus )
Occurrence
The animals are widespread throughout Central Europe, but are less common in the west and south. Good populations of the species can be found, for example, in Hungary or in eastern Austria in the area around Lake Neusiedl.
swell
literature
- Harde, Severa: Der Kosmos Käferführer , Franckh-Kosmos Verlags-GmbH & Co KG, Stuttgart 2009, ISBN 978-3-440-12364-5 .
