Summary for Sardinidion blackwalli (Araneae)

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National Distribution

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Sardinidion blackwalli male Copyright: Tylan Berry
Identification difficulty rating: 3
Name: Sardinidion blackwalli
Authority: (O.P.-Cambridge, 1871)
Order: Arachnida: Araneae
Family: Theridiidae
National Rarity status: NS
IUCN status: LC

Records: 356
First Record: 1896
Latest Record: 2023

1992-on hectads: 111
Pre-1992 hectads: 30
Total hectads: 135

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About this species

Recorded altitude range
1m to 188m

Species text

The species is widespread but locally distributed in England, mainly south of the Midlands. In Fenno-scandia it has only been recorded from Finland, but the spider is otherwise widespread in north-western and central Europe.

Habitat and ecology
This species builds its webs mainly in and around buildings, but also in grass tussocks and on other low plants and tree trunks in a variety of habitats. In Leicestershire the species occurs on walls and gravestones in and around churches and their churchyards, but has not been recorded from vegetation within the county (J. Daws, pers. comm.). Adults of both sexes have been recorded between May and July, but females may persist later. Daws (1999) suggests a short maturity season.

Generally uncommon, although it has been found to be frequent in and around churches in Leicestershire (Daws 1999).

Too little is known about the ecological requirements of this species to establish what threats it faces.

Management and conservation
More information on the ecology of this species is needed before management recommendations can be made.

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 192 records with adult season information)


background methodology

Broad Habitat Data (based on 129 records with habitat information)

Broad subhabitat Data (based on 2 records with subhabitat information)

Structural Habitat Data (based on 5 records with structural habitat information)

Habitat Detail and Method (based on 51 records with habitat detail and method information)

Recorded management for locations with Sardinidion blackwalli

Recorded substrate and hydrology for locations with Sardinidion blackwalli


Sardinidion blackwalli - adult male
Sardinidion blackwalli - adult male
Sardinidion blackwalli - showing carapace markings
Sardinidion blackwalli - showing carapace markings
Sardinidion blackwalli - dorsal view
Sardinidion blackwalli - dorsal view
Sardinidion blackwalli male
Sardinidion blackwalli male
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