Summary for Philodromus emarginatus (Araneae)

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National Distribution

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Philodromus emarginatus Copyright: Peter Harvey
Identification difficulty rating: 3
Name: Philodromus emarginatus
Authority: (Schrank, 1803)
Order: Arachnida: Araneae
Family: Philodromidae
National Rarity status: NR
IUCN status: VU, criteria: B2ab(ii,iv)

Records: 70
First Record: 1890
Latest Record: 2022

1992-on hectads: 15
Pre-1992 hectads: 21
Total hectads: 31

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About this species

Recorded altitude range
10m to 525m

Species text

The species has widely scattered records as far north as West Ross. It is widespread in western and central Europe.

Habitat and ecology
The spider occurs on pine trees, occasionally on heather (probably near pines), mainly in heathland areas. One female has been found guarding an egg-sac under a stone on river shingle in Caledonian pine forest (I. Dawson). It is adult from May to July.

The spider is known from only six locations since 1992. It is very local and appears to have undergone major long-term decline. Area of occupancy has apparently declined by 70% since that time.

The clearance of semi-natural Scots pine for intensive forestry plantations might be detrimental for this species.

Management and conservation
Maintain some old semi-natural pine on heathland

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 21 records with adult season information)


background methodology

Broad Habitat Data (based on 18 records with habitat information)

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

Structural Habitat Data (based on 11 records with structural habitat information)

Habitat Detail and Method (based on 12 records with habitat detail and method information)

Recorded management for locations with Philodromus emarginatus

Recorded substrate and hydrology for locations with Philodromus emarginatus


Philodromus emarginatus
Philodromus emarginatus
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