Gyna centurio questions!

[OblongonotaFan321]

I just got 4 of these a few days ago, I really want to breed them! The first thing I wanted to ask is how to sex the nymphs, I tried looking at the abdomen segments underneath like with my hisser nymphs but I can't tell 😕

I have one that's a lot bigger than the others, will keeping it at room temperature (70 F)  and the other ones warmer let the smaller ones catch up to it in size?  It looks like a subadult but I wasn't sure. Thanks for any help!

 

[Allpet Roaches]

You can check the gender on older nymphs with the segments, but if these are pretty small it may not be obvious. Do they all look like males or all females? The female nymphs grow a lot larger than the male nymphs due to the difference in the adult size.

[OblongonotaFan321]

The oldest nymph and 2 of the smaller ones look like males, the tiniest one might be too small to tell but I thought it looked like a female. The segment on that one looks wider than on the other nymphs

[Allpet Roaches]

The males are very small compared to females and mature faster, so if the little ones are males they might all mature at the same time.

[Hisserdude]

I personally find it hard to sex Gyna nymphs for whatever reason, until they're around subadult size... Even medium female nymphs often look male to me from below, of course once they get larger it's easier to tell...