Marpissa muscosa
Encyclopedia
Marpissa muscosa is a species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of jumping spider
Jumping spider
The jumping spider family contains more than 500 described genera and about 5,000 described species, making it the largest family of spiders with about 13% of all species. Jumping spiders have some of the best vision among invertebrates and use it in courtship, hunting and navigation...

.

Females reach about 8–11 mm length, males only 6–8 mm. Both sexes are coloured grey to brown. The whole spider has a furry appearance and is flattened in shape.

The species builds a kind of nest under the bark of dead trees. Up to 100 of these nests can occur side by side. This spider has a hierarchy: weaker animals will show their inferiority by strutting their front legs and slowly receding from the scene.

Distribution

M. muscosa lives in the Palaearctic.

It is uncommon but widespread in England, more frequent in the south and east. It is widespread in northern Europe.
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