A new toad from Mexico with a redefinition of the _cristatus_ group. [Please select]
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Systematic studies based at least in part on specimens from Michoacán have resulted in a redefinition of nine species and subspecies: _Bufo marmoreus_, _Bufo perplexus_, _Anolis nebulosus_, _Anolis nebuloides_, _Sceloporus bulleri_, _Sceloporus heterolepis_, _Sceloporus melanorhinus calligaster_, _Hypsiglena torquata torquata_, and _Hypsiglena torquata ochrorhyncha_. [Please select]
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The presence of certain characters supposedly diagnostic of the subspecies _gadowi_ (line on dorsum and thighs) in the population of _usta_ in southern Veracruz suggests that a redefinition of the ranges of these subspecies will be in order when sufficient material is available to delimit them accurately. [Please select]
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