The status and distribution of the jumping spider Sitticus floricola in Northwest England and Wales

A field survey of the Near Threatened and Nationally Rare jumping spider Sitticus floricola (C. L. Koch, 1837) was undertaken between 8th August and 8th October 2017 to ascertain its current distribution in England and Wales.

A desk study revealed that Sitticus floricola was recorded previously from 21 bogs (17 sites), however four sites/bogs have been lost to agriculture. Of the 17 extant bogs, 16 were resurveyed and a further 11 investigated.
Sitticus floricola was reconfirmed at 8 known sites (11 bogs) and recorded for the first time at a further two sites (four bogs: Vicarage Moss Small basin, Lily Pool, Brackenhurst Bog, Little Budworth Common North Moss). It was not found at five bogs where it had previously been recorded. Potential threats to S. floricola populations are outlined and its current area of occupancy in England and Wales calculated to be about 12 ha in total.

This lowland raised bog survey recorded 108 spider species, 6 harvestmen, a pseudoscorpion and a centipede. The survey produced records of the Nationally Rare spiders Carorita limnaea (Crosby & Bishop, 1927), Glyphesis cottonae (La Touche, 1946), Gnaphosa nigerrima L. Koch, 1877, Minicia marginella (Wider, 1834) and Sitticus caricis (Westring, 1861). Glyphesis cottonae is recorded as new to Wales.
Populations of the Bog Pseudoscorpion Microbisium brevifemoratum (Ellingsen, 1903), C. limnaea and M. marginella were discovered at Bettisfield Moss; each representing the third known British localities for these species.

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