Diptera.info :: Identification queries :: Other insects, spiders, etc.
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 Unknown webb spider
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| Alvesgaspar |
Posted on 15-10-2007 18:38
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 Member Location: Lisbon, Portugal Posts: 571 Joined: 24.08.07 |
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 Alvesgaspar attached the following image:  [114.72Kb] |
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| Rui Andrade |
Posted on 15-10-2007 19:18
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 Member Location: Portugal Posts: 3122 Joined: 19.06.07 |
Steatoda nobilis (Theridiidae)???? |
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| jorgemotalmeida |
Posted on 15-10-2007 19:52
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 Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
Yes, alright!!  It is a male of Steatoda nobilis (THERIDIIDAE) ! Extremely common this species. |
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| Alvesgaspar |
Posted on 15-10-2007 20:17
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Member Location: Lisbon, Portugal Posts: 571 Joined: 24.08.07 |
Thank you, Rui and Jorge. How can we see it is a male?... Joaquim Gaspar |
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| Rui Andrade |
Posted on 15-10-2007 20:29
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Member Location: Portugal Posts: 3122 Joined: 19.06.07 |
Spider's pedipalps are bigger in males, and the female of this species is "fatter"  .Jorge, please translate my language into something more technical. |
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| Isidro |
Posted on 15-10-2007 21:30
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Member Location: Zaragoza, Spain Posts: 2058 Joined: 26.04.07 |
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...) |
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| Rui Andrade |
Posted on 15-10-2007 21:36
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Member Location: Portugal Posts: 3122 Joined: 19.06.07 |
Thank you for your important explanation. |
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| jorgemotalmeida |
Posted on 15-10-2007 22:17
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
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 08:42 |
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| Rui Andrade |
Posted on 15-10-2007 22:34
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Member Location: Portugal Posts: 3122 Joined: 19.06.07 |
This is the language that I was talking about . Thank you, Jorge. |
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| Isidro |
Posted on 16-10-2007 06:31
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Member Location: Zaragoza, Spain Posts: 2058 Joined: 26.04.07 |
jorgemotalmeida wrote: There are species where the male is much bigger than female. What ones?????????????????????????  It exist in Europe?? And in Iberian peninsula???? |
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| jorgemotalmeida |
Posted on 16-10-2007 08:57
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Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
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 |
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but don't see the image in the post.