Non-Native British Spiders

Introduction

The following table provides a list of non-native spiders and other arachnids known to the author as having been recorded in Britain as a consequence of being introduced via various vectors. This includes those discovered within packaged fresh food such as fruit and vegetables, or the horticultural trade (e.g. garden centres), or are only known from heated biomes such as butterfly-farms, tropical houses etc. It excludes those deliberately imported or bred for the pet trade but if an individual is subsequently discovered in a free state (i.e. wandering outwith the intended enclosure), this would be included for the purposes of completeness.

They typically occur as adventives (one-offs) or can only maintain populations in heated biomes such as hot houses or greenhouses. They are not included in the main British list published by Lavery (2019) but those in his Appendix B1 and B2 are with the exception of those that maintain self-sustaining populations. Thus, all species listed are unlikely (or cannot) survive outdoors and exclude taxa which have been introduced to Britain but are now established such as Pholcus phalangioides or Steatoda nobilis.  The table has been amended from Wilson (2012).

To the author's knowledge, there is no other list of such taxa maintained in Britain and it is intended that this list will be maintained on an ad hoc basis for the purposes of keeping a record. Any readers who are able to add verifiable records can contact he author: aoc [at] britishspiders.org.uk

Family..............................Species

Theraphosidae....................Cyriocosmus elegans (Simon, 1899)
Pholcidae...........................Artema atlanta Walckenaer, 1837
........................................Holocnemus caudatus (Dufour, 1820)
........................................Holocnemus pluchei (Scopoli, 1763)
........................................Spermophora kerinci Huber, 2005
Oonopidae.........................Diblemma donisthorpei O. P. –Cambridge, 1908
........................................Ischnothyreus velox Jackson, 1908
........................................Triaeris stenaspis Simon, 1891
Oecobiidae.........................Uroctea durandi (Latreille, 1809)
.........................................Oecobius navus Blackwall, 1859
Uloboridae..........................Uloborus plumipes Lucas 1846
Nesticidae...........................Nesticella mogera (Yaginuma, 1972)
Theridiidae..........................Achaearanea tepidariorum (C.L. Koch, 1841)
.........................................Achaearanea veruculata (Urquhart, 1885)
.........................................Coleosoma floridanum Banks, 1900
.........................................Nesticodes rufipes (Lucas, 1846)
.........................................Steatoda grossa (C.L. Koch, 1838)
.........................................Steatoda triangulosa (Walckenaer, 1802)
Araneidae..........................Cyrtophora citricola Forsskal, 1775
Anapidae............................Pseudanapis aloha Forster, 1959
Gnaphosidae.......................Urozelotes rusticus (L. Koch, 1872)
Salticidae............................Hasarius adansoni (Audouin, 1826)
.........................................Menemerus bivittatus (Dufour, 1831)
.........................................Panysinus nicholsoni (O.P. -Cambridge, 1899)
.........................................Phylaeus chrysops (Poda 1761)
.........................................Plexippus paykulli (Audouin, 1826)
.........................................Phidippus johnstoni (Peckham & Peckham, 1883)
Sparassidae.........................Barylestis variatus (Pocock, 1899)
..........................................Heteropoda venatoria (Linnaeus, 1767)
..........................................Olios sanctivincentii (Simon, 1897)

References

Lavery, A.  (2019) A revised checklist of the spiders of Great Britain and Ireland. Arachnology, 18(3): 196 - 213 Wilson, R. (2012) An American Jumper in Leeds, West Yorkshire and an Update on Non-Native Taxa Recorded in the UK. Newsletter of the British Arachnological Society, 123: 10 - 15

Author: Richard Wilson Last Updated: 17th November 2020