Summary for Xysticus ulmi (Araneae)

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National Distribution

 
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Xysticus ulmi female about to balloon Copyright: Peter Harvey
Identification difficulty rating: 3
Name: Xysticus ulmi
Authority: (Hahn, 1831)
Order: Arachnida: Araneae
Family: Thomisidae
IUCN status: LC

Records: 1572
First Record: 1878
Latest Record: 2017

1992-on hectads: 223
Pre-1992 hectads: 180
Total hectads: 320

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About this species

Recorded altitude range
0m to 549m

Species text

Distribution
The species is widespread in the southern half of Britain mainly towards the east, becoming scattered in the west and north as far as central Scotland. However X. ulmi appears to be genuinely absent or very rare in the extreme south-east of the country. It is widespread in western and central Europe.

Habitat and ecology
The spider usually occurs on low vegetation and in the ground layer in damp situations, especially in marshes, fens, and rough grassland, but in North Essex it is also found in ditches alongside arable fields, hedge banks, roadside verges and woodland especially in open and coppiced areas. Juveniles are often found in ground litter at the base of vegetation whereas adults are usually swept from herbage. Females guard their egg-sacs, usually near the tops of higher plants. Adults of both sexes are found mainly in May and June, females occasionally into the autumn.

Status
Local, but the spider may be frequent, as in north and west Essex. Its absence in the southern and eastern parts of Essex, the driest parts of Britain, may be the result of low rainfall and humidity.

Original author of profile: P.R. Harvey

Text based on Harvey, P.R., Nellist, D.R. & Telfer, M.G. (eds) 2002. Provisional atlas of British spiders (Arachnida, Araneae), Volumes 1 & 2. Huntingdon: Biological Records Centre.  References

Adult Season

Adult Season Data (based on 585 records with adult season information)


Habitats

background methodology

Broad Habitat Data (based on 581 records with habitat information)

Broad subhabitat Data (based on 48 records with subhabitat information)

Structural Habitat Data (based on 277 records with structural habitat information)

Habitat Detail and Method (based on 316 records with habitat detail and method information)

Recorded management for locations with Xysticus ulmi

Recorded substrate and hydrology for locations with Xysticus ulmi

Images

Xysticus ulmi
Xysticus ulmi
Xysticus ulmi female about to balloon
Xysticus ulmi female about to balloon
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