Wednesday, February 4, 2026

First Confirmed Intergeneric Tri-brid in Hissing Cockroaches!

As far as I know, I am now the first to create a intergeneric "tri-brid" hisser, that is a hybrid of three different hisser genera. I did so by pairing a virgin female Gromphcisia mahoganitigris "Tiger Hog" (a hybrid between Gromphadorhina portentosa "LLE Mahogany" and Princisia vanwaerebeki "Tiger"), with a male Aeluropoda insignis. The female aired out her oothecae a couple months back, and two nymphs hatched out prematurely, though have gone on to grow and molt several times thus far. I'm hoping the female will birth the remainder of the nymphs soon, she looks ready to burst.

I am naming this cross: Gromphcisopoda triconvena. The nothogenus is fairly self explanatory (read my post here for clarification if needed), but the notho species name is a combination of -tri- meaning three, and -conven- from the latin "convenio" meaning combine/come together. That's in reference to this being an intergeneric triple hybrid, probably the first one documented in the Blattodea.
The most compromised mutt hisser lines on the market probably only have two genera, Gromphadorhina and Princisia mixed in. And likely only three species are represented in most mutts, G.portentosa, G.oblongonata, and P.vanwaerebeki.

Newborn L1
L2

Even if the female does not give birth to the rest of her nymphs, these two nymphs have molted to L4 now and I can confirm it's a sexed pair, so I got quite lucky there. 😄 Really looking forward to seeing these mature, and seeing what morphology and coloration combination is created! 

Well, that does it for this post, thanks for reading, hope everyone enjoyed, and I'll see you all next time! 😉