Thread subject: Diptera.info :: Unknown webb spider
Posted by Alvesgaspar on 15-10-2007 19:38
#1
I'm even worse with spiders than with insects. Browsing through galleries doesn't help much :p. A medium spider found in a wall, about 8mm (without legs).
Thanks for your help,
Joaquim Gaspar
Lisbon
Posted by Rui Andrade on 15-10-2007 20:18
#2
Steatoda nobilis (Theridiidae)????
Posted by jorgemotalmeida on 15-10-2007 20:52
#3
Yes, alright!! :) It is a male of Steatoda nobilis (THERIDIIDAE) ! Extremely common this species.
Posted by Alvesgaspar on 15-10-2007 21:17
#4
Thank you, Rui and Jorge. How can we see it is a male?...
Joaquim Gaspar
Posted by Rui Andrade on 15-10-2007 21:29
#5
Spider's pedipalps are bigger in males, and the female of this species is "fatter" :D.
Jorge, please translate my language into something more technical.
Posted by Isidro on 15-10-2007 22:30
#6
Is all well said, Rui. The male's pedipalps are broad at the tip. The size of the abdomen isn't a good character for differenciate the sex: females that have been many time without food, can look males! (I found a long time ago, a Lycosa tarentula female with abdomen lesser than prosoma...)
Posted by Rui Andrade on 15-10-2007 22:36
#7
Thank you for your important explanation.
Posted by jorgemotalmeida on 15-10-2007 23:17
#8
yep. Swollen palps -> male;
not swollen palps > nymph or juvenile or female. :) And females have usually the epigyne on womb (there are exceptions). The size is not reliable. There are many variations. There are species where the male is much bigger than female.
Edited by jorgemotalmeida on 16-10-2007 09:42
Posted by Rui Andrade on 15-10-2007 23:34
#9
This is the language that I was talking about :D.
Thank you, Jorge.
Posted by Isidro on 16-10-2007 07:31
#10
jorgemotalmeida wrote:
There are species where the male is much bigger than female.
What ones????????????????????????? :o:o:o:o:o:o:o:o It exist in Europe?? And in Iberian peninsula????
Posted by jorgemotalmeida on 16-10-2007 09:57
#11
Argyroneta aquatica! :D THE ONLY one spider that lives underwater in the wordl (known so far), and one of few cases where the males are bigger than females. You have it in Spain. Go to Girona. :D I saw once time and I have a crap video in youtube showing it inside water. :)
http://cat.inist....t=14456961