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. 2000 Nov 28;97(26):14438–14443. doi: 10.1073/pnas.250413397

Figure 1.

Figure 1

Summary geographic distributions of 12 vertebrate species or species-groups evaluated in this study; data for G–L are summarized from the literature (4–9). (A) Peromyscus eremicus group, including P. eremicus (horizontal bars), P. eva (dark shading southern peninsula), P. fraterculus (diagonal bars), and P. merriami (dark shading western continental). P. eremicus was considered a single widespread species before recent phylogeographic analysis (10) that proposed western populations be designated as separate species, P. fraterculus. (B) Bailey's pocket mouse group, including Chaetodipus baileyi (dark shading) and C. rudinoris (light shading). C. baileyi was considered a single species before recent phylogeographic analysis (11) that proposed populations west of Colorado River be designated as a separate species, C. rudinoris. (C) Little desert pocket mouse, C. arenarius. (D) Merriam's, Dipodomys merriami, San José Island, D. insularis (i), and Margarita Island, D. margaritae (m) kangaroo rats. (E) Antelope ground squirrels, including Ammospermophilus leucurus (light shading), A. harrisii (dark shading), A. interpres (horizontal bars), and A. insularis (i). (F) Red-spotted toads, Bufo punctatus. (G) Desert woodrats, Neotoma lepida species-group, including N. devia (outlined) and N. lepida, with dashed line separating probable ranges of eastern and western phylogroups (4). (H) Le Conte's thrasher, Toxostoma lecontei group, considered a single species before phylogeographic analysis (5) that proposed southern peninsular populations be designated as a separate species, T. arenicola (dark shading). (I) Gopher snakes, Pituophis melanoleucus complex. (J) Side-blotched lizards, Uta stansburiana group. (K) Tree lizards, Urosaurus nigricaudus group (shaded). (L) Three species of rock lizards (9): Petrosaurus mearnsi (northernmost solid outline), P. repens (dashed outline), and P. thalassinus (southernmost solid outline). (M) Warm deserts of North America as depicted by Shreve (12): Sonoran, including peninsular (green), Mojave (yellow), Chihuahuan (red).