Yes well, that's the common line; but I know the difference between dubias and orange heads, and these ain't orange heads.
I would put money on not having two species of roaches living together, but I'm going to put some time into figuring this out if I have to separate out every single suspicious character, individual by individual. In fact, I would love to be wrong, to be able to pull out the miscreants and have my awesome normal dubia colony back again!
I can certainly say, however that the nymphs that grow into these bizarre gold red "dubia roaches" are not--emphatically not--orange head nymphs, whatever it is they turn out to be. They look nothing like Eublaberus posticus nymphs. Rather, they look like especially lusterless, dun-colored dubia nymphs with malformed wing buds all out of proportion with the size of the nymph.
And the males have really tragic problems with their ultimate molt. I get males that come out looking like bats or stealth bombers, their wings are so badly out of alignment. I get crinkly wings and paperie wings and sometimes no wings at all, just a bit of wing cover.
And I also occasionally see this horrible blister looking condition on these odd adult males, sometimes within a wing filament, sometimes within a prosoma: a quarter or half inch blister filled with fluid. Absolutely revolting. This only occasionally happens, and has only occurred since I started noticing these wing variations in my adults indicating that something was wrong. I have truly exceptional husbandry where my dubias are concerned. I put a lot of work into keeping their bins in top condition. Believe me: this is not a result of sub-standard living conditions or humidity parameters outside of those optimal for dubia roaches.
Can you think of a species of roach that resembles a dubia but has these sorts of issues with molting, wing chewing, and conceivably with humidity needs that fall outside the parameters of those appropriate for dubias? Because finding that guilty species is the only thing that is going to convince me that I don't have some sort of hybridization going on here.
After all, taxonomists have been wrong before about genus designation. Lord, have they! I can hardly go a month without having to rewrite a label for one or more of my tarantulas species. Don't even get me started on the whole Avicularia/Caribena issue, and if you really want to see a tarantula keeper go off like a rocket, just ask them if they honestly think that's a pure-bred Grammostola pulchra they just spent so much money on? On second thought, don't. They might actually strike you. I know I'd like to hit somebody when I think about the cuckoo in my pulcra nest!
At any rate, thank you so kindly for your help with this issue! I'm tentatively willing to go with the idea that I have two species, but I've got to find a better candidate than the orange head. I'll make a point of keeping you up-to-date as the saga continues. And if I'm wrong, the Mea Culpas will come raining down like, well, RAIN.