Summary for Silometopus incurvatus (Araneae)

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National Distribution

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Identification difficulty rating: 3
Name: Silometopus incurvatus
Authority: (O.P.-Cambridge, 1873)
Order: Arachnida: Araneae
Family: Linyphiidae
BAP status: UKBAP
National Rarity status: NR
IUCN status: VU, criteria: B2ab(ii,iv)

Records: 86
First Record: 1869
Latest Record: 2022

1992-on hectads: 14
Pre-1992 hectads: 19
Total hectads: 26

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About this species

Recorded altitude range
0m to 20m

Species text

The species is apparently restricted to sand dunes in the northern half of Britain, on the coast of North Yorkshire, Northumberland, East Lothian, Aberdeenshire, Moray, Ayrshire and Islay. In Europe it has been recorded from Belgium, the Netherlands, Germany and Scandinavia.

Habitat and ecology
S. incurvatus occurs on sand dunes, in marram litter 8 - 20 cm above ground level, and in sea buckthorn litter. Adults have been found between February and June.

UK Biodiversity Action Plan priority species. Although the spider is numerous at some sites, it has shown an apparently significant major decline in the past 30 years and is only recorded from five 10-km squares post-1992. Area of occupancy has declined from 17 hectads before 1992 to 5 since that date.

Possibly public pressure in some of the more southern sites.

Management and conservation
Control erosion and maintain healthy growth of marram on sand dunes.

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 46 records with adult season information)


background methodology

Broad Habitat Data (based on 54 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 34 records with structural habitat information)

Habitat Detail and Method (based on 40 records with habitat detail and method information)

Recorded management for locations with Silometopus incurvatus

Recorded substrate and hydrology for locations with Silometopus incurvatus


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