Nhandu coloratovillosus male or female ?
Male, without a doubt, the fold related to the spermatheca is absent and the spinners for the spermatic web are clearly visible.
 
Seconding male. That dark patch in the center of the furrow are the epiandrous fusillae, the micro-spinnerets Poecilotherion mentioned. :)
 

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Epiandrous fusillae sexing (Not Molts)
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