Summary for Porrhomma rosenhaueri (Araneae)

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National Distribution

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Porrhomma rosenhaueri female Copyright: Richard Gallon
Identification difficulty rating: 4
Name: Porrhomma rosenhaueri
Authority: (L.Koch, 1872)
Order: Arachnida: Araneae
Family: Linyphiidae
National Rarity status: NR
IUCN status: NT, criteria: B2a

Records: 7
First Record: 1971
Latest Record: 2017

1992-on hectads: 1
Pre-1992 hectads: 2
Total hectads: 2

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About this species

Recorded altitude range

Species text

In Britain P. rosenhaueri has been recorded only from Lesser Garth cave and Ogof-y-Ci near Cardiff (Chapman 1993). It has been recorded from Ireland, Spain, France, Belgium, Denmark, Germany, Switzerland, Hungary and Poland.

Habitat and ecology
This species is a blind troglobite which lives in the network of cracks and fissures that permeate the limestone (Chapman 1993). Females have been found in July, but adults probably occur all year.

The spider has been recorded on very few occasions, and is threatened by quarrying in one of the cave systems.

Quarrying may be a threat to these cave systems (Chapman 1993).

Management and conservation
Ensure statutory protection for cave systems in which it occurs.

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 1 records with adult season information)


background methodology

no broad habitat data available

no subhabitat data available

no structural habitat data available

no habitat detail or method data available

Recorded management for locations with Porrhomma rosenhaueri

Recorded substrate and hydrology for locations with Porrhomma rosenhaueri


Porrhomma rosenhaueri 3 female
Porrhomma rosenhaueri 3 female
Porrhomma rosenhaueri 2
Porrhomma rosenhaueri 2
Porrhomma rosenhaueri female
Porrhomma rosenhaueri female
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