Thread subject: Diptera.info :: Unknown webb spider
#1
I'm even worse with spiders than with insects. Browsing through galleries doesn't help much
. A medium spider found in a wall, about 8mm (without legs).
Thanks for your help,
Joaquim Gaspar
Lisbon
#2
Steatoda nobilis (Theridiidae)????
#3
Yes, alright!!
It is a male of Steatoda nobilis (THERIDIIDAE) ! Extremely common this species.
#4
Thank you, Rui and Jorge. How can we see it is a male?...
Joaquim Gaspar
#5
Spider's pedipalps are bigger in males, and the female of this species is "fatter"
.
Jorge, please translate my language into something more technical.
Posted by
Isidro on 15-10-2007 21:30
#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...)
#7
Thank you for your important explanation.
#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.
#9
This is the language that I was talking about
.
Thank you, Jorge.
Posted by
Isidro on 16-10-2007 06:31
#10
jorgemotalmeida wrote:
There are species where the male is much bigger than female.
What ones?????????????????????????
It exist in Europe?? And in Iberian peninsula????
#11
Argyroneta aquatica!
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.
I saw once time and I have a crap video in youtube showing it inside water.
http://cat.inist....t=14456961