Does dysdera occassionally practice matriphagy? Or is there likely to have been something else at work? There is no sign of any spiderlings, and the exeoskeleton was in bits, so doesn't appear to have been ecdysis.
Rhododendron would seem an ideal habitat for a spider noted for its love of shaded situations.
I am not being critical of anybody here, so please don't take my posts as being targeted as yourself. It is extremely pleasing that you have suggested posting on the SRS forum and will continue to do so. Thank you for this. Was your Zilla diodia adult? I suspect not at this time of year, whereas juveniles/subadults would not be surprising. Zilla is one of the species which can generally be identified as a juvenile!
I agree that most spiders can't be identified (to species) from most photographs, and I often re-iterate that on the various forums where spiders are posted for 'identification'.
However, I disagree that id from photographs is a worthless pursuit, as, if nothing else, its an opportunity to engage the public and encourage some interest in spiders. A surprising number of the photographs that are posted are identifiable, most to family, some to genera, and a surprising amount to species.
I also think a photograph, whilst it may not provide certainty, can give a good indication of whether something is worth further investigation ~ in this case I don't think I was wrong to push it on for clarification. It's araniella. Fine. That is why I suggested it get posted here, for confirmation *or* rejection. So I'll continue to suggest that identifications that are outside my experience, but possibly of some significance, are referred here. I'll also continue to promote the SRS as a source of information for distribution, phrenology etc.
On balance, I hope on our interactions, I'm still in credit, though I do need to get my next chunk of microscopically confirmed records to you.. I had an out of season adult male metellina mengei yesterday, and a zilla diodia on rhododendron the day before.
The modern fashion that all and anything can be identified from a photograph, including photographs of juveniles, will also simply result in a lot of incorrect records and web traffic for no good purpose. I would certainly say that the spider pictured at http://www.flickr.com/photos/mickmassie/6931647794/ link is indeed likely to be an Araniella species and not A. alsine. People jump to the conclusion just from the colour that an araneid must be A. alsine when plenty of garden spider Araneus diadematus can be orange for example, a large proportion of Araniella juveniles can be orange and so on. Araneus diadematus can usually be distinguished by the abdominal markings, including in juveniles, but these are also very variable and sometimes indistinct. Araniella species certainly cannot be reliably determined without microscopical examination, and even then can be difficult.
Other than the very small proportion of species where for various reasons it is safe to assume a juvenile identification, adults are a must. The only way of getting experience of juveniles and making PROVISIONAL identifications in the field or from photographs is by examining a lot of adult spiders under a microscope over a great many years and rearing juveniles through.
http://www.flickr.com/photos/mickmassie/6931647794/ - presumably also araniella.
As I had no experience of this species, and considering its status in the UK (and especially the IOW) I thought it was worth flagging to someone that did have experience, just in case. A bit less optimism, and a bit more experience of juvenile araniella might have spared some net traffic, but its hard to get experience of juveniles when the bulk of the discipline is based on mature sexual characters.
It would be useful, for future reference, to know any firm character(s) that marks this as araniella rather than araneus, or is it just jizz (abdomen shape?) that marks this out to more experienced eyes?
Best Regards, Matt
I posted this spider photo for identification at Wild About Britain where Matt Prince and Pepsis have suggested it could be a juvenile Araneus alsine. Matt subsequently suggested I post the photo here for further comment.
I gather it may be of interest as there may not be records of this species for the Isle of Wight, if it is this species. The spider was photographed on beech around 2ft from the ground in mixed deciduous woodland near Sandown on 29th November.
Thanks in advance for any help, Rob
Archives: May 2019 Apr 2019 Mar 2019 Feb 2019 Jan 2019 Dec 2018 Nov 2018 Oct 2018 Sep 2018 Aug 2018 Jul 2018 Jun 2018 May 2018 Apr 2018 Mar 2018 Feb 2018 Jan 2018 Nov 2017 Oct 2017 Sep 2017 Aug 2017 Jul 2017 Jun 2017 May 2017 Apr 2017 Mar 2017 Feb 2017 Dec 2016 Oct 2016 Sep 2016 Aug 2016 Jul 2016 Jun 2016 May 2016 Apr 2016 Mar 2016 Feb 2016 Jan 2016 Dec 2015 Nov 2015 Oct 2015 Sep 2015 Aug 2015 Jul 2015 Jun 2015 May 2015 Apr 2015 Mar 2015 Feb 2015 Dec 2014 Nov 2014 Oct 2014 Sep 2014 Aug 2014 Jul 2014 Jun 2014 May 2014 Apr 2014 Mar 2014 Feb 2014 Jan 2014 Dec 2013 Nov 2013 Oct 2013 Sep 2013 Aug 2013 Jul 2013 Jun 2013 May 2013 Apr 2013 Feb 2013 Jan 2013 Dec 2012 Nov 2012 Oct 2012 Sep 2012 Aug 2012 Jul 2012 Jun 2012 May 2012 Feb 2012 Jan 2012 Dec 2011 Nov 2011 Oct 2011 Aug 2011 May 2011 Mar 2011 Dec 2010 Nov 2010 Sep 2010 latest posts