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Common woodlouse- Oniscus asellus
Common woodlouse- Oniscus asellus


Common woodlouse
The common woodlouse (Oniscus Asellus), belongs to the order isopods (Isopoda), the family Oniscidae and the genus Oniscus. This species is commonly found in Europe, America, Africa and Asia. Common woodlice reach body lengths of 15-18 mm. They are dark grey to blackish-brown in colour. They have two longitudinal rows of bright spots on their backs and bright coloured. appendages with punctiform openings (defensive glands) on their sides. They have lobes on the sides of their heads at eye level.

The common woodlouse lives among fallen leaves, in rotting wood, under stones and under the surface layer of medium moist soil in deciduous forests and bushes. It is also found in cellars, gardens, stables, greenhouses and compost heaps. An adequate level of humidity is important, since their gills can only absorb oxygen, when combined with a film of water. Common woodlice are active during both day and night, but prefer the darkness. They feed on plants, fruits and vegetables. Woodlice are preyed on by a variety of birds.

Adult woodlice have a life expectancy of up to 2 years. They reproduce with the onset of warmer weather. The females produce 10-70 young, up to 3 times a year. These are 2-3mm in length. The females retain the fertilized eggs in pouches. These pouches are situated on the legs and are filled with water. The young develop in these pouches and leave as small woodlice. Further brood care is not necessary. About 3 months later, the young woodlice become adults and shed their skin for a living. The adults overwinter in the soil.

Oniscus asellus
Subspecies2
Common namesCommon woodlouse, Common Shiny Woodlouse, European Sowbug
German namesMauerassel
Dutch namesKelderpissebed
Danish namesMurbænkebider, Glat baenkebider, Glat bænkebider
Finnish namesTarhasiira, Saunamaija
Norwegian namesMurskrukketroll
Swedish namesMurgråsugga
French namesCloporte commun
AuthorCarl von Linné (Carl Nilsson Linnæus), 1758
Distribution
Continents:

Eurasia
Europe
North Europe (British Isles (United Kingdom (Great Britain (England (English Midlands (East Midlands (Leicestershire))))), Ireland), Germany (West Germany (North Rhine-Westphalia)), Scandinavia (Norway, Sweden, Denmark), Fennoscandia (Finland)), West Europe (Austria, France, Switzerland, Benelux (Belgium, Netherlands, Luxembourg)), South Europe (Italy, Iberian Peninsula (Spain, Portugal)), Central Europe (Poland, Czech Republic (Moravia, Bohemia), Slovakia), Southeast Europe (Greece)
Oceania
Australasia
Australia
America
North America
Mexico, Canada, USA, Saint Pierre and Miquelon
South America
Chile


CountriesAustralia, Austria, Belgium, Canada, Chile, Czech Republic, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Mexico, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland, USA, United Kingdom
Distr. infoExclusive Economic Zone
Links and ReferencesOniscus asellus in faunaeur.org
Oniscus asellus in itis.gov
Oniscus asellus in dyntaxa.se
Oniscus asellus in Wikipedia (English)

Description of images / photos
Photography with Cameras
Nikon D3x, Nikon D300, Canon 50D
Image editing with Photoshop
1. Common woodlouse- Oniscus asellus
Quick search: Woodlice - Oniscus - Armadillium - Woodlouse - Life - Isopods
Forest - Care - Asellus - Overwintering - Common - Young - Sides - Water
Taxonomy
ClassMalacostraca
Malacostracans, Higher Crustaceans
SubclassEumalacostraca
SuperorderPeracarida
OrderIsopoda
Sowbugs, Pillbugs, Isopods, Woodlice, Water Slaters, Freshwater Isopods, Isopods and sowbugs
SuborderOniscidea
Woodlice
InfraorderLigiamorpha
SectionCrinocheta
SuperfamilyOniscoidea
FamilyOniscidae
Sowbugs
GenusOniscus
Speciesasellus
Oniscus asellus
Common woodlouse, Common Shiny Woodlouse, European Sowbug
AuthorLinnaeus, 1758
 
Synonyms
Oniscus affinis
Oniscus fossor
Oniscus lamperti
Oniscus languidus
Oniscus lineatus
Oniscus murarius
Oniscus nodulosus
Oniscus taeniola
Oniscus vicarius
Porcellio lineatus
Porcellio taeniola
 
Subspecies
Oniscus asellus asellus
Oniscus asellus occidentalis
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Keywords
ABCDEFGHIJKLM
NOPQRSTUVWXYZ
German Flag Mauerassel
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