Bricklayer

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Bricklayer
Wall wood louse (Oniscus asellus)

Wall wood louse ( Oniscus asellus )

Systematics
Class : Higher crabs (Malacostraca)
Order : Woodlice (isopoda)
Subordination : Common woodlice (Oniscidea)
Family : Wall woodlice (Oniscidae)
Genre : Oniscus
Type : Bricklayer
Scientific name
Oniscus asellus
Linnaeus , 1758
Brick from the side.
Bricklayer

The wood lice ( Oniscus asellus ) is a wood louse from the family of the wall wood lice (Oniscidae). The type is one, together with the wood louse ( Porcellio scaber ) Trichoniscus pusillus and Trachelipus rathkii the most common woodlice in Central Europe and the people also occurs frequently in the area.

features

The animals are 15 to 18 millimeters long, 6 to 10 millimeters wide and have a broad, oval, clearly flattened body shape. Its dark brown, glossy body has variable dark spots and is clearly grainy. The first antennae are very small, the second are long and powerful and have a tripartite flagella. This distinguishes the species from the similar cellar lobster ( Porcellio scaber ), whose flagellum has only two limbs. The front edge of the head is drawn out in front of the eyes on both sides into a long frontal lobe that protrudes at an angle. The pleopods have no tracheal organs .

Young animals differ from adult animals in a striking way, for example in terms of the granulation or the shape of the head. Due to this fact, new species were incorrectly described several times in the past, which turned out to be young wall lice.

Occurrence and way of life

The wall isop is common in large parts of Europe, but is absent in the Mediterranean area. The expansive species originally comes from Western Europe, it becomes rarer towards the east and is there more and more tied to humans. It was also abducted to North America, where it is now very common. It mainly colonizes damp and dark places and occurs near people, for example under objects in the garden or in the compost heap . In forests they can be found under the stones and bark of dead wood . It often occurs with the equally widespread cellar louse, but the latter is more resistant to drying out and also colonizes drier habitats.

Others

Although the Sow is not a caveman in a narrow sense, it was the German Speleological Federation to cave animal of the year named 2020th

supporting documents

Individual evidence

  1. ↑ a b c Heiko Bellmann : Kosmos-Atlas arachnids of Europe . Franckh-Kosmos, Stuttgart 2001, ISBN 3-440-09071-X , p. 274 .
  2. ↑ a b Hans-Eckhard Gruner: Crustaceans or Crustacea V. Part Isopoda . In: The animal world of Germany and the adjacent parts of the sea according to their characteristics and their way of life . tape 53 . VEB Gustav Fischer Verlag, Jena 1966.
  3. ^ Oniscus asellus in Fauna Europaea. Retrieved May 20, 2012

literature

Web links

  • Brick wall on the website of the University of Münster
Commons : Oniscus asellus  - collection of images, videos and audio files