Basement louse

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Basement louse
Basement louse

Basement louse

Systematics
Superordinate : Satchel Shrimp (Peracarida)
Order : Woodlice (isopoda)
Subordination : Common woodlice (Oniscidea)
Family : Porcellionidae
Genre : Porcellio
Type : Basement louse
Scientific name
Porcellio scaber
Latreille , 1804

The cellar lobster ( Porcellio scaber ) belongs to the land louse . It is usually slate gray to yellowish gray, but there are also red animals with black spots. It has a finely jagged, semicircular articulated back armor , consisting of chitin , 14 striding legs and 12 split feet as well as a tail plate with tactile organs. The antenna whip is bipartite and the body length is 9-13.5 millimeters.

Surname

The name Assel comes from the Latin asellus = the little donkey, Porcellio from the Latin porcella = the pig, scaber (Latin) = rough, unclean.

nutrition

Wood lice feed on the detritus (dead organic matter) of their habitats and thus belong to the saprophages . They play an important role in the decomposition of organic material. But they also eat aisles in ready-to- harvest potatoes . A potato affected in this way then only has an entrance / exit hole approx. 3 mm in diameter. Stored fruit and vegetables are also affected.

habitat

The louse lives in the direct catchment area of ​​the typical food for them. A common occurrence is under stones, in the litter layer of damp deciduous forests and shrubbery, as well as in basements, gardens, stables, greenhouses, compost heaps and especially near dead wood .

Anatomy and biological characteristics

Like other land lice , the wood louse possesses pseudo- tracheas with which it can absorb oxygen from the air. These are colored white and lie under the outer branches of the hind feet. You can see them when you look at the belly side.

In the event of danger, it plays dead ( numbness ), but, unlike members of the Armadillidiidae family such as the roll louse , cannot curl up into a closed ball.

The fertilized 25 to 90 eggs and the larvae are carried by the female in a fluid-filled bladder on the ventral side for about 40 to 50 days. The animals are sexually mature after 14 moults, but moults still occur occasionally, after about three months they are fully grown. They have a life expectancy of two years.

photos

  • Porcellio scaber

  • Porcellio scaber

  • Porcellio scaber

  • Close up

literature

  • Heiko Bellmann, Cosmos Atlas Arachnids of Europe. And freshwater crabs, woodlice, millipedes, Kosmos, 2006, ISBN 3440107469 .

Web links

Commons : Kellerassel  - Album with pictures, videos and audio files

Individual evidence

  1. ↑ Adolf Herfs: About the body coloring of the basement louse, Porcellio scaber Latr. In: Indicator for pest science, plant and environmental protection. 46, 1973, pp. 83-86, doi : 10.1007 / BF02006470 .
  2. ↑ Anke Braun: The children's rock house . 3. Edition. FABrockhaus, Gütersloh / Munich 2013, ISBN 978-3-577-07616-6 , p. 13 .
  3. ↑ a b M.P. Berg, H. Wijnhofen: Landpissebedden: Een tabel voor de landpissebedden (Crustacea; Oniscidae) van Nederland en België . KNNV Uitgeverij, Utrecht 1997, p. 80 .
  4. ↑ Kluge / Götze: Etymological Dictionary of the German Language , Berlin 1951.
  5. ↑ Birgit Mehlhorn, Heinz Mehlhorn : Ticks, mites, flies, cockroaches: Check the vermin. Springer Verlag, 2013, p. 189 ( online ).
  6. ↑ Uninvited guests: cellar wood lice, wall wood lumber (PDF file, 130 kB).
  7. ↑ Leaflet from the Pest Control Advice Center of the City of Zurich: Die Kellerassel ( Memento from August 12, 2017 in the Internet Archive ), PDF file, 148 kB.
  8. ↑ Googlebooks: Profiles of the most important food pests: appearance, occurrence and control , p. 12/13 .