Assessing concurrent patterns of environmental niche and morphological evolution among species of horned lizards (Phrynosoma)

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Horned lizards (Phrynosoma) incapacitate dangerous ant prey with mucus.

Horned lizards (Iguanidae, Phrynosomatinae, Phrynosoma) are morphologically specialized reptiles characterized by squat, tank-like bodies, short limbs, blunt snouts, spines and cranial horns, among other traits. They are unusual among lizards in the degree to which they specialize on a diet of ants, but exceptional in the number of pugnacious, highly venomous, stinging ants they consume, especi...

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Reproductive Mode and Female Reproductive Cycles of Two Endemic Mexican Horned Lizards (Phrynosoma taurus and Phrynosoma braconnieri)

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Quantifying ecological, morphological, and genetic variation to delimit species in the coast horned lizard species complex (Phrynosoma).

Lineage separation and divergence form a temporally extended process whereby populations may diverge genetically, morphologically, or ecologically, and these contingent properties of species provide the operational criteria necessary for species delimitation. We inferred the historical process of lineage formation in the coast horned lizard (Phrynosoma coronatum) species complex by evaluating a...

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Prey snapping and visual distance estimation in Texas horned lizards, Phrynosoma cornutum.

Captive Texas horned lizards were high-speed videotaped while feeding on ants in order to study the role of vision in facilitating tongue-protrusion capture of prey. Analysis of tongue movements revealed that prey snapping in these lizards is not a typical fixed-action pattern. By contrast, it is variable in performance and duration. Lizards adjusted head and tongue direction during the strike,...

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ژورنال

عنوان ژورنال: Journal of Evolutionary Biology

سال: 2009

ISSN: 1010-061X,1420-9101

DOI: 10.1111/j.1420-9101.2009.01779.x