[Jim I. Mead]

Hi all,
I am new to your system. I am looking to better understand how to tell the various species with Coleonyx, specially those from Sonora, Mexico. If you have any thoughts, suggested readings, or whatever, I would appreciate it.
Thanks,
JIM

[Brachydactylus]

The following is the best source:
Grismer,L.L. (198
Phylogeny, Taxonomy, Classification, and Biogeography of Eublepharid Geckos
in: Estes,R. & Pregill,G. (eds.)
Phylogenetic Relationships of the Lizard Families
Stanford University Press
ISBN 0-8047-1435-5
pp. 369-469
Essentially, there are three lineages: C. fasciatus, C. v. variegatus and C. v. sonoriensis. The two subspecies of variegatus are very similar morphologically and likely not too different based on fossil or subfossil data. C. fasciatus might be, but I don't know the characters beyond pattern.