sexing roaches

RomanBuck

Simandoa
Does anyone know how to sex the following species?

N. cinerea

P. nivea

H. flexivatta

I have an idea on P. nivea I think... The males are overall smaller and the females are bulkier and slightly larger.

No idea on the other species though...

 
Here it is demonstrated with Hissers. Not the same species but you get the idea.

Male: Picture

Female: Picture

Note that while the female's body ends with one, broad, large segment, the male's body ends with three.

Also, I know that H. flexivitta females are noticeably larger than males.

 
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