The lizard genus Cnemidophorus (family Teiidae) contains sexual as well as parthenogenetic species. The theoretical two-fold fitness advantage of asexuality does not translate into any obvious ...

A long, slender lizard moved among trees in a pinyon-juniper woodland on the Colorado Plateau, searching the accumulated debris beneath the trees for grubs, spiders, beetles or any other insects. It ...

Scientists better understand how and why hybridization leads to diverse evolutionary outcomes – such as increased genetic diversity in a species, versus creation of a species that’s wholly new – ...

A team led by biologists at The University of Texas at Arlington has published a study supporting the theory that species that reproduce asexually have more harmful genetic mutations than those ...

While many organisms featured in this column can observed statewide, others only occur in small pockets of appropriate habitat throughout the state. However, there is one species of whiptail that's ...