Summary details for Porrhomma rosenhaueri (L. Koch, 1872)

Species Details

Species name: Porrhomma rosenhaueri (L. Koch, 1872)
Synonyms: Porrhomma proserpina subsp. myops Simon, Porrhomma myops Jackson, 1913
Taxonomy: Animalia :: Araneae :: Linyphiidae

Distribution

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.

Status

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

Threats

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.).

Stats

First recorded: 1971
Last recorded: 2023
Total records: 8
Total visits: 8

Conservation status

Porrhomma rosenhaueri

Source	Reporting category	Designation	Date designated	Comments
A Review of the scarce and threatened spiders (Araneae) of Great Britain: Species Status No. 22 (Sep 2017)	Rare and scarce species	Nationally Rare. Includes Red Listed taxa	42979
A Review of the scarce and threatened spiders (Araneae) of Great Britain: Species Status No. 22 (Sep 2017)	Red listing based on 2001 IUCN guidelines	Near Threatened	42979	This troglobitic species has been recorded in two subterranean systems, one of which has not been surveyed in recent years. The impact of quarrying activity on this species is uncertain. Threats: Quarrying may be a threat to these cave systems (Chapman 1993).

Photos and media

Spatial distribution - hectad map

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Thresholds:

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Rejected records are excluded from this map. Unverified records are included.

Temporal distribution - records by year

Records that span more than one year are not included in this chart.