Your new posted pictures can't be identified to species I'm afraid. Your sap (Sac) spider is a juvenile Clubiona. There are many species, all pretty similar and adults under a microscope are needed for all but one or two species. Your Unknown spider 1 is again a baby, after lightening the image it looks as though it might possibly be the jumping spider Pseuduophrys lanigera, but by no means a definite id. The Unknown spider 2 is a juvenile Pardosa wolf spider. Again identification of almost all of these requires adults under a microscope.
The post code is EX6 8FD and the date was Thursday 20th November, I will remember to include that in the post in future :)
For Peter and Evan
My place of work is in a rural surrounding with fields and some wastelands, open habitats etc which is one of the reasons I believed it could be Tegenaria agrestis... The out building where I find is right next to hedges and fields with no real human movement.
There was some iridescence on the jaws of the spider in the hole but not vivid green... There was at least twelve or so radiating threads, I would say 18 or so threads maybe, I was using the camera on my phone, but it refused to focus on the spider I tried many different settings as it usually pretty good for photographing spiders and other nature but on that evening it would only focus on the brickwork...
Amazing pictures Evan, they are lovely!!
Thank you again! :)
I was waiting for comment from Claire about iridescence on the jaws (certainly depends on the lighting) and the radiating threads of Segestria species. Without these, I do not believe any reliable identification can be made.
With the other 2, one is a Tegenaria species, but which species requires examination under a microscope. It will not be Tegenaria agrestis, which in this country occurs outdoors in open habitats under stones and similar, not indoors or in gardens.
The other one might be an Amaurobius species, but it is not possible to be sure from your photograph. Segestria species make a tubular retreat with a web that has a dozen or so radiating threads with proceed from the mouth of the retreat. Segestria florentina has iridescent green jaws, which do not appear to be present in your photo.
Pleae note that if you expect help, you should provide a full postcode or Ordnance Survey grid reference and date of the record as requested.
There is anyway no way of knowing if this is the first time the spider has been imported into Cumbria. Presumably there is a fairly equal chance of its importation into any part of the country, and the event is more likely to be related to the location of supermarkets or distribution centres etc as anything else.
When I manage to find the time to get the information ready for MapMate Ltd to update the spider taxon library for this software, it will be possible to add records for this species and for these to be mapped on this website. If you provide me with the full details of your record, I can manually do this for this species straight away. However you will note that the checklist update to MapMate will be in accordance with the latest British checklist (Arachnology 16 (4) Spring 2014), where for example your Parasteatoda simulans remains in Achaearanea. In the checklist the reasons for this decision is explained. In Britain we should be following the British checklist until such time as it is again updated.
Apologies about the low quality of the micrograbs, but here's a couple of theridiidae from Plymouth that might be of interest to forum members.
Found on the underside of a bit of blue plastic debris in a damp and shaded deciduous woodland with little understory in Plymouth. Male and female together in a negligible tangle web. Area is a nature reserve but adjoining a housing estate with much litter and signs of fly-tipping.
Jizz was acharaneae like, being quite small I was thinking it might be parasteatoda simulans, but it had a small tubercle on the back of the rounded, high abdomen in both sexes. Genitalia was simple and didn't match any of the illustrations in Roberts, but did match those in the BAS article 123 from 2012 - Cryptachea blattea. A vagrant from NZ, thought to be imported with plant material.
Marriott D (2012) Cryptachaea blattea (Urquhart, 1886) a theridiid new to Great Britain. Newsl Br Arachnol Soc 123: 9-10
Have their been any records between 2012 and these two specimens Peter?
One to watch out for perhaps?
Is this a rare occurrence or do these small spiders catch such large prey often? She seems to have wrapped the house spider's front legs together to trap him.
ADDED - Postcode CV13 0HW Sorry if its really common, but I'm just interested.
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