Armadillidium opacum

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Armadillidium opacum
Armadillidium opacum: The two bumps on the forehead are characteristic.

Armadillidium opacum: The two bumps on the forehead are characteristic.

Systematics
Class : Higher crabs (Malacostraca)
Order : Woodlice (isopoda)
Subordination : Common woodlice (Oniscidea)
Family : Armadillidiidae
Genre : Armadillidium
Type : Armadillidium opacum
Scientific name
Armadillidium opacum
( CLKoch , 1841)
Macro shot

Armadillidium opacum is a woodlice from the suborder of the land woodlice (Oniscidea). It belongs to the family Armadillidiidae, also called roll lice.

features

The animals have a body length of 10 to 12 millimeters. Your body is long-oval and clearly arched. The body outline appears closed. The black-gray, slightly shiny animals are finely dotted at the top and often have small, light spots. The antenna whip is bipartite, the forehead has two humps lying close together in the middle and a bulging edge. Further down on the head the animals have three broad, short frontal lobes. On both sides of the head there is the first segment of the thorax , which is drawn out into pointed side lobes . The last pair of pleopods, the uropods, are plate-shaped and lie between the sides of the telson and the rear edge of the pleon . The species can be confused with several species of the genus Armadillidium , but differs from them, among other things, by the shape of the frontal edge.

Due to their short, high-arched body and the ability to curl up in danger, the roll lobsters are often confused with the juice balls , which are, however, double-footed . The juice balls differ from the roll lobsters in the largely uniform segments and the ability to hide the head with the first back shield when rolling inside the ball.

Occurrence and way of life

The species colonizes Central Europe, north to central Sweden, south to northern Italy. west to eastern France, east to Croatia, Poland and Lithuania. It inhabits mainly deciduous forests rich in dead wood and can be found there in stony and open areas. The animals prefer dry limestone areas and are usually frequent there. The species is rare in north-west Germany and is only found scattered throughout Germany.

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. ↑ Helmut Schmalfuss (2003): World catalog of terrestrial isopods (Isopoda: Oniscidea). Stuttgart Contributions to Natural History Series A (Biology) 654. 341 pp.
  3. ^ Armadillidium opacum. Retrieved July 25, 2019 (nl-nl).

literature