Summary for Xysticus bifasciatus (Araneae)

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National Distribution

 
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X. bifasciatus eating a Mellicta athalia Copyright: Lars Bruun
Identification difficulty rating: 3
Name: Xysticus bifasciatus
Authority: C.L.Koch, 1837
Order: Arachnida: Araneae
Family: Thomisidae
National Rarity status: NS
IUCN status: LC
Watching Brief: Amber

Records: 241
First Record: 1861
Latest Record: 2019

1992-on hectads: 44
Pre-1992 hectads: 42
Total hectads: 77

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About this species

Recorded altitude range
20m to 700m

Species text

Distribution
The species is widely scattered in England, Wales and Scotland, but fairly widespread in southern central England. It is a Palaearctic species widespread in western and central Europe, but has not been recorded from Ireland.

Habitat and ecology
X. bifasciatus is a large and robust spider and of the twelve British species in the genus it is equalled in size only by X. luctator and X. robustus. It is found in low vegetation, under stones on chalk grassland and sometimes on warm grassy heaths. Adults of both sexes are found in spring and early summer, females occasionally persisting into the autumn.

Status
Scarce, but may be frequent at some sites, particularly in southern England. This species has apparently shown a long-term decline.

Threats
The decline has probably been a result of loss of calcareous grassland to arable and succession to scrub and woodland.

Management and conservation
Maintain open ground and early successional stages on chalk grassland.

Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.).  References

Adult Season

Adult Season Data (based on 76 records with adult season information)


Habitats

background methodology

Broad Habitat Data (based on 83 records with habitat information)

Broad subhabitat Data (based on 1 records with subhabitat information)

Structural Habitat Data (based on 42 records with structural habitat information)

Habitat Detail and Method (based on 48 records with habitat detail and method information)

Recorded management for locations with Xysticus bifasciatus

Recorded substrate and hydrology for locations with Xysticus bifasciatus

Images

X. bifasciatus eating a Mellicta athalia
X. bifasciatus eating a Mellicta athalia
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