I can't find any species on the Internet in the Blaptica family except Dubia. Are there any other roaches in that family available in the roach hovby, and can dubia hybridize with any roaches we keep?
That website is excellent for looking up roach taxonomic info.
None of the species currently available will hybridize with B. dubia I suspect that the genus Byrsotria may be more closely related to them than other Blaberinids like Blaberus or Archimandrita.