A Key to Amphibians and Reptiles of the Continental United States and CanadaWhile it can serve to identify specimens in the field, it is intended primarily as a teaching tool for classifying preserved specimens whose geographic origins are known. The dichotomous keys are supplemented by 257 line illustrations depicting the distinguishing morphological characteristics of salamanders, frogs and toads, turtles, alligators and crocodilians, amphisbaenians (wormlike lizards), lizards, and snakes. |
Common terms and phrases
adpressed limbs amphibians authorities have suggested blotches body CAAR carapace chin shields Collins costal folds costal grooves cranial crests crossbands dark spots digits distinct Dorsal pattern Dorsal scale rows dorsal spots Dorsal view dorsolateral stripes Dorsolateral view dorsum Drawn EDH 94 Figure genus ground color head hindlimb indistinct internasal scales keeled Key to Genera Key to Species labial scales present Lateral view light lines light spots light stripe lizards loreal marginal median Mexico midbody middorsal stripe mottled neck Paratoid glands parietal scales pattern variable photograph by Suzanne Phrynosomatidae pl 38 CAAR pl 43 CAAR plastron posterior postorbital preocular scale preserved specimen preserved specimen KU Rostral scale salamander scale rows number scales Fig scales in contact scales shaded scute showing the presence snout southern subocular scales supralabial scales supraocular scales tail taxon taxon consists Texas tips tympanum upper labial scales usually venter ventral scales Ventral view