|SPINY-TAILED IGUANA Ctenosaura sp.|
DESCRIPTION: A large (up to 310 mm or 12.25 " from snout to vent), gray to brown lizard with black crossbars on the body and a long spiny tail. The posterior portion of the tail is usually banded. Coloration of individuals can change rapidly from pale gray to dark gray. Juveniles are bright green. A row of enlarged scales forms a ridge that runs from the neck, down the center of the back, and onto the tail.
REMARKS: The lizards that exist at the Arizona-Sonora Desert Museum are a genetic cross between Ctenosaura conspicuosa (San Esteban Island Spiny-tailed Iguana) and C. hemilopha macrolopha (Sonoran Spiny-tailed Iguana).
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