| phylogeny, divergence times and species limits of spiny lizards (sceloporus magister species group) in western north american deserts and baja california. | the broad distribution of the sceloporus magister species group (squamata: phrynosomatidae) throughout western north america provides an appropriate model for testing biogeographical hypotheses explaining the timing and origins of diversity across mainland deserts and the baja california peninsula. we inferred concordant phylogenetic trees describing the higher-level relationships within the magister group using 1.6 kb of mitochondrial dna (mtdna) and 1.7 kb of nuclear dna data. these data provi ... | 2007 | 17944851 |