My buddy Justin posted a link to a paper on Facebook yesterday:  “The desert tortoise trichotomy: Mexico hosts a third, new sister-species of tortoise in the Gopherus morafkai – G. agassizii group”. I’ve been waiting for this; it’s been known for some time that Gopherus populations in southern Sonora and northern Sinaloa are genetically distinct.  The tortoises that roam the thornscrub and tropical deciduous forest have finally been described as Gopherus evgoodei, and reading the paper brought back memories of my own encounters with this new species, on my first trip to Mexico with some friends back in 2011. We spent a number of days herping in southern Sonora, and on one of them we visited a bio-preserve in the…