Species Details
- Species name
- Caviphantes saxetorum (Hull, 1916)
- Synonym
- Lessertiella saxetorum (Hull, 1916)
- Taxonomy
- Animalia :: Araneae :: Linyphiidae
- running water
Distribution
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.Status
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.Threats
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.).Stats
- First recorded
- 1900
- Last recorded
- 2023
- Total records
- 63
- Total visits
- 61
Conservation status
Caviphantes saxetorum
| 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 | 01/09/2017 | |
| 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 | 01/09/2017 | True level of decline uncertain, with little recent survey of its river bank sand and shingle habitats stones at former sites in Wales; requires further survey. Threats: None currently known although the 'tidying up' of river banks might represent a potential threat. |
Photos and media
No photos or media files available
Spatial distribution - hectad map
Click on one of the date ranges in the key to highlight that particular range. Click anywhere else on the map to go back to all three date ranges.
Thresholds:
Move mouse cursor over dot for info
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.
Temporal distribution - records by week
__