Biting spider ID.

[paulinemiller10]

A friend of mine got bitten by this spider a year or so ago, it made a round red mark that took ages to heal, there is still a brown mark on her leg where she was bitten, has any one got any idea's what kind of spider this might be. Thanks Pauline.

[nightshade]

It looks like Dysderidae (Crocata) the Woodlouse killer, big fangs for getting in under the armour plates

[RobAtkinson1]

It may be Dysdera erythrina.

[nightshade]

Yes Rob you are right Dysdera erythrina. not crocata

[paulinemiller10]

Thanks both, I would have been searching for hours, you are a clever lot, I will pass the information on to my friend that was bitten with this spider, she will be pleased to know what kind of spider it was. Many Thanks. Pauline.

[No.9 Spider]

Originally Posted by nightshade

Yes Rob you are right Dysdera erythrina. not crocata

? It could be either species, but is indeterminable without the microscope. I found a specimen last year that is either neither or both Dysdera crocata and Dysdera erythrina. It'll probably be determined as D.crocata eventually.

D. erythrina
The Updated Distribution Maps - British Arachnological Society

D.crocata
The Updated Distribution Maps - British Arachnological Society

[nightshade]

My D.crocata has legs the same colour as its body, D.erythrina has pale legs colour only at the joints, which is why I changed my mind

[No.9 Spider]

Unfortunately the colouring of legs/body in either D. crocata or D. erythrina is not an identifying factor.
D. crocata is a larger species when mature, though the reliable indentifying features are spines or lack of, on femur IV and the palpal details in mature males.

[Africa]

The distribution is different (crocata extending more to the north, erythrina does not appear to cross the Humber much). Crocata is also larger. That could help, depending on your friends location.
I am sorry to hear about your friends experience with the spider, what did actually happen? It is a fearsome looking spider with those fangs, but I find it strangely beautiful, and I had started to get braver dealing with it. I will be very careful in future. I photographed a D. crocata only a few days ago:
BugBlog: Dysdera crocata showing its impressive fangs

[TonySheridan]

Hello. Generally Dysdera crocata and D.erythrina are separated by 1-4 dorsal spines near the base of femur IV - they are entirely absent in the latter. I would subsequently say the photo is of D. erythrina, it's a good photo but slightly blurry so if it is D.crocata, then it's because the spines are not showing up very well!