That being said, exactly WHEN did the use of
Elaphe guttata change to
Pantherophis guttatus and what does that MEAN, exactly? Pardon my ignorance, but I DID notice something different when researching something about corns in Wikipedia, but unfortunately it flew over my head like a
comb-over on a
salesman in a
ceiling fan store!
http://reptile-database.reptarium.c...=guttatus&search_param=((taxon='Colubridae'))
North American rat snakes were moved out of
Elaphe around 2000-2002 to distinguish them from old world rat snakes. Even some of the old world rat snakes are no longer
Elaphe. Before 2000, only Trans-Pecos and Baja rat snakes were outside of the genus
Elaphe for NA rat snakes, having been moved to
Bogertophis in the late 80s. I think Dusty Rhoads talks about that split out in his book
The Complete Suboc.
Unfortunately, back when NA
Elaphe were designated to
Pantherophis, I believe only mtDNA (mitochondrial DNA) was used. There is controversy in using that as mtDNA is of maternal lineage. As such, one is overlooking the other half of genetic data within nDNA (nuclear DNA) which is from paternal lineage.
There is also a current common theme of sinking subspecies and "lumping" everything into species. I disagree with this as the whole premise of subspecies is to describe possible phenotypic (visually discernable) geographic variation within a population that
could give rise to speciation. That said, my grasping of evolution and taxonomy is not what I would like it to be, mostly due to the fact of bible-thumping public education that doesn't allow one to get any solid foundation of such topic until well into college where the topic basically becomes sink or swim with many biology majors seriously struggling with such a core topic - at least such the case when I was in school (over half my evolution class had C or worse, with a vast number of people I considered very smart failing the course along with me on my 1st try), but a weak argument given the numbers of individuals that understand said controversial topic pre, during, and post my time in high school and college. :fullauto:
oke:
Some also argue that much of the herpetological taxonomic work being done is being done just for the sake of it; to merely get published. Case in point, the same group that butchered the black rat snake group, also at one point had successfully published and had peer-accepted use to moving North American rat snakes into the gopher snake genus
Pituophis. There's quite a bit of work being done with North American kingsnakes and milk snakes (including Central American milk snakes...technically still North America), with recent publications having many scratching their heads, especially with regard to the "common kingsnake" or
geulta group.