Sense of pain in spiders

[Adam S]

Do spiders feel pain? Do they really have special pain receptors called nociceptors?

I searched Wikipedia using keyword: pain.

http://en.wikipedia.org/wiki/Pain

I selected a fragment concerning pain in non-human species.

In particular, there are no known nociceptors in groups such as plants, fungi, and most insects, except for instance in fruit flies

There's no information about class Arachnida (arachnids), but the closest one is class Insecta, insects. It says that most insects do not have pain receptors.
It's based on this document:

C. H. Eisemann, W. K. Jorgensen, D. J. Merritt, M. J. Rice, B. W. Cribb, P. D. Webb and M. P. Zalucki (1984) Do insects feel pain? — A biological view. Cellular and Molecular Life Sciences 40: 1420-1423

However it's mentioned that fruit flies, Drosphila melanogaster, do have nociceptors, unlike its quite "primitive life".

painless, a Drosophila Gene Essential for Nociception .
Cell , Volume 113 , Issue 2 , Pages 261 - 273
W . Tracey , R . Wilson , G . Laurent , S . Benzer

If most insects don't have nociceptors can we assume that primitive spiders as tarantulas are the same? I think it's too quick to make any assumptions... (In my case, I have too little infornamtion concerning this topic.)

Did anybody make any tests regarding topic of nociception in spiders?

*Scientifically based answers only please*
If you have any publications or other form of text information regarding this topic, please share it with us/me

Regards

Adam S.

PS. Please excuse my English

[Colin D Wilson]

Some interesting information here on the ILAR site (Institute for Laboratory Animal Research), with references to papers, studies and reference material at the foot of the page as usual.

http://dels.nas.edu/ilar_n/ilarjournal/33_1_2/V33_1_2Question.shtml

[KJ Vezino]

Interesting read:

http://www.parl.gc.ca/37/2/parlbus/commbus/senate/Com-e/lega-e/witn-e/shelly-e.htm