2 sets of spineretts = male?

AshS

Arachnosquire
Joined
Apr 21, 2017
Messages
50
So I was just admiring my newly aqiured C. Cyaneopubescens eating it's first cricket in my care. when I noticed it trying to web the side of it's enclosure, and I saw Four spineretts, two long normal ones and imeadeatly below them two short stumpy ones.
Now forgive me if I'm being nieve, but I am sure I read somewhere that males had a second set which they used for their sperm webs?
However I could be wrong.
Any Ideas?
20170529_222620.jpg
 

AshS

Arachnosquire
Joined
Apr 21, 2017
Messages
50
Also I have just referred back to The Tarantula keepers Guide. And corrected my own misinformation, Tarantals do indeed have four spineretts.
 

sasker

Arachnoangel
Joined
Oct 9, 2016
Messages
794
The 'extra' spinnerets males have are not located where you think they are. There is a small silk producing organ just above the epigastric furrow. In some species this area is visible as a black dot, the epiandrous fusillae. I know that Grammostola and Brachypelma can sometimes be sexed this way, but it is not really a reliable method.The picture below shows the black dot I mentioned.
 
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