Roach Identification help

[jmiller]

Hello,
I received these in the mail today and I do not believe they are what I ordered. I think I know what they are and are not. I do not want to say as that might sway someones thinking. I would just like some confirmation. Any help from experienced roach keepers would be greatly appreciated.

The adults are about 1 3/4 inches long. If you need any additional info please let me know what that might be to help identify these. Thanks for your help.

Here are a few images of some adults and nymphs:

 

[Redapache]

They look like discoids to me B.discoidalis

 

[Matt K]

If those are from the same "batch" that you ordered, I would be inclined to say you have hybrids. They exhibit outward qualities of more than one species of Blaberid.

Here are a few for you to compare to:

What I dont have handy just now is a photo of Blaberus fusca in the same light situation to compare to, but your photos look kinda like a discoid/fusca hybrid, though a little small for that- maybe a discoid/atropos hybrid. Size can be influenced by colony density too though, so if they came from a very crowded colony they will be small-ish for thier type- particularly the males. The latter adult pic has a trapezoidal pronotum blotch which is most common in Blaberus atropos.

Hope that helps....

 

[recluse]

I would be inclined to listen to Matt. As far as I know he is spot on with roaches in my experience.

Hans

If those are from the same "batch" that you ordered, I would be inclined to say you have hybrids. They exhibit outward qualities of more than one species of Blaberid.

Here are a few for you to compare to:

What I dont have handy just now is a photo of Blaberus fusca in the same light situation to compare to, but your photos look kinda like a discoid/fusca hybrid, though a little small for that- maybe a discoid/atropos hybrid. Size can be influenced by colony density too though, so if they came from a very crowded colony they will be small-ish for thier type- particularly the males. The latter adult pic has a trapezoidal pronotum blotch which is most common in Blaberus atropos.

Hope that helps....