Summary for Caviphantes saxetorum (Araneae)

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National Distribution

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Identification difficulty rating: 4
Name: Caviphantes saxetorum
Authority: (Hull, 1916)
Order: Arachnida: Araneae
Family: Linyphiidae
National Rarity status: NR
IUCN status: NT, criteria: B2a

Records: 60
First Record: 1900
Latest Record: 2021

1992-on hectads: 9
Pre-1992 hectads: 14
Total hectads: 20

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About this species

Recorded altitude range
15m to 140m

Species text

The species has been recorded from Wales, scattered localities in Scotland, the River Lune in Lancashire, and from Haltwhistle and the confluence of the rivers East and West Allen in Northumberland. It may be fairly widespread on upland rivers with sand and shingle bars.

Habitat and ecology
Upland rivers. C. saxetorum occurs under stones and boulders on sandy banks of rivers. There is some evidence that it may live in cavities under deeply embedded boulders in winter, and under smaller stones in drier surroundings in summer. Adults of both sexes have been found in March, June and September, a female also in July. It may be adult throughout the year.

Recorded from six hectads since 1992, though showing a decline of two thirds in hectads with spider records both before and after that date (12 to four). Despite the unusual habitat, the paucity of recent records suggests a significant decline.

None currently known although the 'tidying up' of river banks might represent a potential threat.

Management and conservation
Ensure that riverine shingle sites are protected from unnecessary disturbance, and that natural braiding and flooding is allowed on suitable rivers.

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 17 records with adult season information)


background methodology

Broad Habitat Data (based on 10 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 9 records with structural habitat information)

Habitat Detail and Method (based on 9 records with habitat detail and method information)

Recorded management for locations with Caviphantes saxetorum

Recorded substrate and hydrology for locations with Caviphantes saxetorum


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