So this might be old news to some of you, but just in case, I thought I'd reiterate some findings made a couple years back by the taxonomist Dominic Evangelista, and prominent European blatticulturist @Nicolas Rousseaux of the Cafarnarium. You can read the original post here on Facebook, but I figured I'd copy and paste the important parts here on the forum for those who don't frequent FB:
Identification by D. Evangelista, based on animals reared in captivity, mainly strains from the Cafarnarium:
Diploptera punctata ==> Diploptera cf. minor
Uncertain, but it's obviously not Dipl