I went looking for Marmorkrebs, and found this evaluation of its status:
Unavailable names
Procambarus fallax forma virginalis Martin, Dorn, Kawai, van der Heiden &
Scholtz, 2010: 114.
This interests me for a few reasons. I suspect that this checklist calls Procambarus fallax forma virginalis “unavailable” because the authors (Martin et al. 2010) admitted that the name was a kludge that didn’t follow traditional zoological nomenclature. Martin and colleagues wrote:
If additional data should clarify some of the problematic issues (e.g. confirmation of a single origin and/or the detection of regional populations of the Marmorkrebs in the wild) it should be easy to establish a new species using ‘virginalis’ as epithet.
In 2015, Vogt and colleagues suggested just that: to change the species name of Marmorkrebs to Procambarus virginalis, based on both the genetics and differences like average size.
But so far, the Marmorkrebs community hasn’t bought the arguments for a new species name. I don’t believe I have seen one paper that used “Procambarus virginalis” as the main scientific name. A few have mentioned both names. (In some cases, I was a reviewer on the paper and suggested it would be a good idea).
I’m curious as to what it would take for the Marmorkrebs research community to change the scientific name. And how long it will take to percolate through the scientific literature.
Reference
Crandall KA, De Grave S. An updated classification of the freshwater crayfishes (Decapoda: Astacidea) of the world, with a complete species list. Journal of Crustacean Biology: in press. http://dx.doi.org/10.1093/jcbiol/rux070
Martin P, Dorn NJ, Kawai T, van der Heiden C, Scholtz G. 2010. The enigmatic Marmorkrebs (marbled crayfish) is the parthenogenetic form of Procambarus fallax (Hagen, 1870). Contributions to Zoology 79: 107-118. http://dpc.uba.uva.nl/ctz/vol79/nr03/art03
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