Summary for Porrhoclubiona genevensis (Araneae)

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National Distribution

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Clubiona genevensis gravid female Copyright: Richard Gallon
Identification difficulty rating: 3
Name: Porrhoclubiona genevensis
Authority: (L. Koch, 1866)
Order: Arachnida: Araneae
Family: Clubionidae
National Rarity status: NR
IUCN status: NT, criteria: B2a

Records: 76
First Record: 1800
Latest Record: 2022

1992-on hectads: 8
Pre-1992 hectads: 9
Total hectads: 12

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About this species

Recorded altitude range
20m to 104m

Species text

This species has been recorded from four sites on the Lizard in Cornwall, the Isles of Scilly, Lulworth and Ringstead in Dorset and the islands of Ramsey and Skokholm in Pembrokeshire. Recently it has also been found on the Welsh mainland in 2008, on the Lleyn Peninsula. The exact distribution in Europe is uncertain due to confusion with similar species, but it appears to be widespread in western and central Europe as far north as Sweden, where it is included in their Red List (Gärdenfors 2000). It has not been recorded in Ireland.

Habitat and ecology
Maritime grassland and heath. C. genevensis has been recorded from under stones and among scree in maritime grasslands, and also amongst grass and heather in coastal habitats. Adult females have been found from April to September but males only in April.

Although there appears to be a decline in Area of Occupancy its recent discovery in north Wales suggests the potential for further locations along the western coasts. Twenty-seven females or cells with eggs were found on Ramsey Island in 1999 (having been first recorded on the island in 1933), and 24 again in April 2006, so it is clearly well established on Ramsey.

The loss of coastal heaths and grasslands to agriculture plus public pressure on existing sites. Trampling and accidental fires will degrade known sites and may adversely affect this species.

Management and conservation
The reduction of public pressure and trampling may be advantageous. Ramsey Island is now an RSPB reserve.

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 12 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 25 records with structural habitat information)

Habitat Detail and Method (based on 36 records with habitat detail and method information)

Recorded management for locations with Porrhoclubiona genevensis

Recorded substrate and hydrology for locations with Porrhoclubiona genevensis


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