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A Molecular Phylogeny of Agamid Lizards
Vol. 1991, No. 3 (Aug. 1, 1991), pp. 616-622
Stable URL: http://www.jstor.org/stable/1446389
Page Count: 7
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A phylogenetic tree, based on albumin immunological distances, is presented for the Agamidae, with emphasis on the western genera. The Chamaeleonidae appear as the sister group of the Agamidae, which are monophyletic. Uromastyx and Leiolepis represent early sidebranches. The remaining agamids separated into a western and one or more eastern clades during the lower Tertiary. Within the western clade, Trapelus and Agama s.s. are monophyletic, but Stellio is diphyletic. The Palaearctic Stellio s.s. is the sister group of Phrynocephalus, whereas the Ethiopian Stellio atricollis group seems to be more closely related to Pseudotrapelus. Judging from branch lengths in the best fitting Wagner tree, a uniform average evolutionary rate of albumin can be attributed to most lineages, except Acanthosaura, Calotes, and Gonocephalus, which show a marked increase in their albumin evolution, and Uromastyx, which has a comparatively slowly evolving albumin.