Summary for Tapinocyboides pygmaeus (Araneae)

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National Distribution

 
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Identification difficulty rating: 4
Name: Tapinocyboides pygmaeus
Authority: (Menge, 1869)
Order: Arachnida: Araneae
Family: Linyphiidae
National Rarity status: NR
IUCN status: DD

Records: 31
First Record: 1951
Latest Record: 1998

1992-on hectads: 2
Pre-1992 hectads: 5
Total hectads: 7

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About this species

Recorded altitude range

Species text

Distribution
The species has been recorded from the South Downs near Heyshott, West Sussex, in 1951; the Chilterns at Buttler's Hangings and Swain's Wood, Buckinghamshire, in 1982; Town Kelloe Banks, Co. Durham, in 1982 and 1986; a farm at East Lilburn, North Northumberland, in 1987; Hampstead Heath, Middlesex (Milner 1992); near Duddingston, Midlothian; Angus and Shetland (Merrett 2000). The wide geographical spread of the known sites suggests that it may be more widespread than the present records indicate. Elsewhere in Europe, it is known from Belgium, Sweden, Norway, Finland and central Europe.

Habitat and ecology
This species has been found among grass roots on chalk and limestone grassland and, in Northumberland, in grass on boulder clay. During pitfall-trapping at Buttler's Hangings, the females of this species built their webs between the plastic cup and the tin sleeve of the pitfall trap, and the main habitat is probably mouse tunnels and crevices created by soil creep (J. Hancock, unpublished). Both sexes are found in September, April and May, and males also in March. The peak of activity is possibly in April.

Status
The spider has been rarely recorded but, as the species is very small and pale and lives among grass roots, it could easily be overlooked. It was numerous at Heyshott and Buttler's Hangings but has apparently declined significantly so that it has only been recorded from two 10-km squares since 1992. It has been recorded from only four locations since 1992 showing an apparent decline from five locations prior to that date.

Threats
Conversion of calcareous grassland to arable agriculture or the scrubbing-over of sites if grazing lapses.

Management and conservation
Grazing to produce a diversity of sward heights is likely to maintain the soil and vegetation structure required by this spider.

Text based on Dawson, I.K., Harvey, P.R., Merrett, P. & Russell-Smith, A.R. (in prep.).  References

Adult Season

no detailed adult season data available


Habitats

background methodology

no broad habitat data available

no subhabitat data available

no structural habitat data available

no habitat detail or method data available

Recorded management for locations with Tapinocyboides pygmaeus

Recorded substrate and hydrology for locations with Tapinocyboides pygmaeus

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