Summary for Agroeca dentigera (Araneae)

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National Distribution

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Agroeca dentigera female Copyright: Richard Gallon
Identification difficulty rating: 4
Name: Agroeca dentigera
Authority: Kulczynski, 1913
Order: Arachnida: Araneae
Family: Liocranidae
National Rarity status: NR
IUCN status: DD

Records: 7
First Record: 1989
Latest Record: 2002

1992-on hectads: 1
Pre-1992 hectads: 1
Total hectads: 1

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Resource files for Agroeca dentigera

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About this species

Recorded altitude range
5m to 5m

Species text

First discovered in 1989 at Ynyslas Dunes, part of the Dyfi National Nature Reserve in Ceredigion, Wales, when a single female was taken in a pitfall trap and identified initially as A. lusatica, under which species it was mapped in the Provisional Atlas. When a male was caught in October 2002 along with four more females, less than 200 m from the original site, its true identity was established. The species is widespread in central and eastern Europe, but is rare with very few records.

Habitat and ecology
Coastal sand dunes in UK. In Europe it has been found in a variety of damp habitats. The five spiders in 2002 were found in a sheltered, south-facing dune hollow on the side of an east-west fixed dune at a right-angle to the coast. Adult in October. On the Continent adult in autumn and winter months like most other Agroeca species.

The spider is known from a single site where it appears to occur in very low numbers. Just five individuals were found in 75 man-hours of searching in 2002, only in an area close to the original location where a single individual had been found in 1989.

The small area from which it has been recorded suggests it has very specific habitat requirements, which are likely to be vulnerable to change. Sea level rise may be a problem in the future.

Management and conservation
Maintain all stages of succession in its known sand-dune location. More research is needed into its autecology.

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 2 records with adult season information)


background methodology

Broad Habitat Data (based on 2 records with habitat information)

no subhabitat data available

no structural habitat data available

Habitat Detail and Method (based on 1 records with habitat detail and method information)

Recorded management for locations with Agroeca dentigera

Recorded substrate and hydrology for locations with Agroeca dentigera


Agroeca dentigera female
Agroeca dentigera female
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