Summary for Porrhomma oblitum (Araneae)

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National Distribution

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Identification difficulty rating: 4
Name: Porrhomma oblitum
Authority: (O.P.-Cambridge, 1871)
Order: Arachnida: Araneae
Family: Linyphiidae
National Rarity status: NS
IUCN status: LC

Records: 159
First Record: 1900
Latest Record: 2021

1992-on hectads: 35
Pre-1992 hectads: 36
Total hectads: 66

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Identification guidance for Porrhomma oblitum

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About this species

Recorded altitude range
6m to 200m

Species text

The species is widely distributed in England and Wales from Yorkshire southwards, but is generally scattered and absent from the south-west and many other areas of England and Wales. The species is uncommon but fairly widespread in north-western and central Europe.

Habitat and ecology
The species occurs in wet, usually broad-leaved, litter, in damp woodland and fen carr. It may be swept from herbage in woodland and fens. Adults of both sexes have been found from October to early June. We have limited data for adults between January and June.

The spider may be abundant, but is very local and the number of occupied 10 km squares may have declined in the last 30 years.

The species may be threatened by the loss of damp broad-leaved woodland to intensive forestry or drainage.

Management and conservation
Maintain the water table in damp woodland and fen carr. This is one of the few fen species for which the growth of scrub is beneficial.

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 65 records with adult season information)


background methodology

Broad Habitat Data (based on 70 records with habitat information)

Broad subhabitat Data (based on 3 records with subhabitat information)

Structural Habitat Data (based on 28 records with structural habitat information)

Habitat Detail and Method (based on 39 records with habitat detail and method information)

Recorded management for locations with Porrhomma oblitum

Recorded substrate and hydrology for locations with Porrhomma oblitum


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