Summary for Minicia marginella (Araneae)

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National Distribution

 
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Identification difficulty rating: 5
Name: Minicia marginella
Authority: (Wider, 1834)
Order: Arachnida: Araneae
Family: Linyphiidae
National Rarity status: NR
IUCN status: DD

Records: 10
First Record: 1987
Latest Record: 2017

1992-on hectads: 2
Pre-1992 hectads: 1
Total hectads: 3

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About this species

Recorded altitude range
6m to 285m

Species text

Distribution
The species was discovered in Britain in 1987 at Shakespeare Cliff near Dover. It is widespread though seldom common throughout central and northern Europe as far north as northern Fennoscandia, but seems to be absent from most of the Mediterranean region.

Habitat and ecology
The spiders were taken among samples of invertebrates from an old rock fall at the base of the cliff. The site comprises a small area of moderately sloping chalk grassland dominated by Brachypodium pinnatum and Festuca rubra. In Europe it is most commonly found in dry habitats, among dead leaves, fallen pine needles, moss, and on sand dunes, but may also be found climbing on tall herbs and shrubs such as broom, tamarisk, gorse and juniper. It has also been taken in wet areas such as marshes. Both the original British specimens were collected in pitfall traps set between 27th May and 24th June.

Status
The spider has only been found at one site in Britain. A male and female were collected in pitfall traps in 1987, and several of the easily recognizable immatures were seen in early June 1991. The spider has not been collected in Britain since that date, an apparent decline of 100% in the number of locations from which it has been recorded.

Threats
The species was discovered during an extensive invertebrate survey of several sites around Dover and Folkestone as part of a study of the ecological impact of the engineering work for the Channel Tunnel. It is not known how the construction of the Channel Tunnel has affected the population of this species, but recent fieldwork in the area has not recorded the species. If it is restricted to such a small, rather vulnerable area it must be under considerable threat. The main threat to the location itself may, in the long term, be sea level rise and increased wave action

Management and conservation
Too little is known of the habitat and other ecological requirements of this species in Britain to be able to make management recommendations.

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 9 records with adult season information)


Habitats

background methodology

Broad Habitat Data (based on 9 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 8 records with structural habitat information)

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

Recorded management for locations with Minicia marginella

Recorded substrate and hydrology for locations with Minicia marginella

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