2 sets of spineretts = male?

[AshS]

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?

 

[viper69]

Tarantulas are not sexually dimorphic in this regard. We all wish they were.

 

[Moakmeister]

All tarantulas have four spinnerets.

 

[AshS]

All tarantulas have four spinnerets.

Yeah I also read that that aswell, so I'm fairly sure I read some bad info somewhere. Just confused me.

 

[AshS]

Also I have just referred back to The Tarantula keepers Guide. And corrected my own misinformation, Tarantals do indeed have four spineretts.

 

[truehourglass]

[deleted]

 

[sasker]

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.