One of the animals hatched here in the my lab about 7 months ago now has eggs of her own. I can now officially say that there is a breeding colony of Marmorkrebs for research in North America.
For those who think the title of this post is a bit cryptic, this is a reference to standard notation of generations in genetics. The parental generation is considered "P"; their offspring is designated "F1", which is short for "first filial" generation, and the offspring of the F1 generation are named "F2".
In my case, the original animals I received would be the P generation. They gave me eggs of the F1 generation in late October, and this will be the start of the F2 generation.