Summary for Micrargus apertus (Araneae)

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National Distribution

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Micrargus apertus female Copyright: Tylan Berry
Identification difficulty rating: 4
Name: Micrargus apertus
Authority: (O.P.-Cambridge, 1871)
Order: Arachnida: Araneae
Family: Linyphiidae
IUCN status: LC

Records: 1287
First Record: 1964
Latest Record: 2022

1992-on hectads: 236
Pre-1992 hectads: 119
Total hectads: 326

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About this species

Recorded altitude range
0m to 890m

Species text

M. apertus is widespread in Scotland and parts of England, but very scattered or absent elsewhere. It is a Palaearctic species recorded from Scandinavia, Belgium, Germany, Austria, the Czech Republic, Poland and Romania.

Habitat and ecology
The spider is usually found in moss, leaf litter and detritus in woods. Any differences in habitat requirements between M. apertus and M. herbigradus are not yet clear, but M. herbigradus seems to occur in more open habitats than M. apertus in the north (P. Merrett, pers. comm.). Adults have been recorded at all seasons of the year with a peak in spring and early summer.

The species is apparently more local and scarce than M. herbigradus in the south, but commoner than that species in the north. M. apertus was reinstated as a species separate from M. herbigradus by Millidge (1975). In both sexes, careful consideration of the genitalia is necessary to distinguish between these two species.

Original author of profile: D.R. Nellist.

Text based on Harvey, P.R., Nellist, D.R. & Telfer, M.G. (eds) 2002. Provisional atlas of British spiders (Arachnida, Araneae), Volumes 1 & 2. Huntingdon: Biological Records Centre.  References

Adult Season

Adult Season Data (based on 873 records with adult season information)


background methodology

Broad Habitat Data (based on 557 records with habitat information)

Broad subhabitat Data (based on 20 records with subhabitat information)

Structural Habitat Data (based on 648 records with structural habitat information)

Habitat Detail and Method (based on 879 records with habitat detail and method information)

Recorded management for locations with Micrargus apertus

Recorded substrate and hydrology for locations with Micrargus apertus


Micrargus apertus male
Micrargus apertus male
Micrargus apertus (female)
Micrargus apertus (female)
Micrargus apertus female
Micrargus apertus female
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