Table 4.
List of amphibians and reptiles that could potentially occur in Sonora.
| Class Amphibia | |
| Order Anura | |
| Craugastoridae | |
| Craugastorvocalis (Taylor, 1940) | Likely to occur in tropical deciduous forest and montane woodlands in the Río Fuerte drainage of extreme southeastern Sonora. |
| Ranidae | |
| Ranablairi (Mecham, Littlejohn,Oldham, Brown, & Brown, 1973) | Likely to occur in Chihuahuan Desert or semi- desert grassland of northeastern Sonora, along the US-Mexico border east of Naco. |
| Scaphiopodidae | |
| Speabombifrons (Cope, 1863) | Likely to occur in Chihuahua desertscrub east and plains grassland of northeastern Sonora. |
| Class Reptilia | |
| Order Squamata | |
| Suborder Amphisbaenia | |
| Bipesbiporus (Cope, 1894) | This species has been observed in the San Carlos Bay, municipality of Guaymas (Ballinger pers. comm., May 2009), but no museum record or voucher exist to support its presence in Sonora. |
| Suborder Lacertilia | |
| Anguidae | |
| Barisialevicolis (Smith, 1942) | Likely to occur in woodlands of the Sierra Madre Occidental of eastern and northeastern Sonora |
| Phrynosomatidae | |
| Sceloporusbimaculosus Phelan & Brattstrom, 1955 | Expected in Chihuahuan desertscrub and semi- desert grassland valleys as well as the lower slopes of the mountains along the US – Mexico border from the Río San Pedro valley east to the Sierra San Luis, and potentially in Plains grassland in the southern Animas Valley (northeastern Sonora). |
| Scincidae | |
| Plestiodonmultilineatus (Tanner, 1957) | Likely to occur in woodland of the Sierra Madre Occidental of eastern and northeastern Sonora |
| Suborder Serpentes | |
| Boidae | |
| Lichanuraorcutti Stejneger, 1889 | Has been found within a few km of the Sonora border in the Tinajas Altas Mountains of Yuma County, Arizona |
| Colubridae | |
| Lampropeltisgentilis (Baird & Girard, 1853) | Occurs in southeastern Cochise County, Arizona |
| Tantillanigriceps Kennicott, 1860 | Likely occurs in northeastern Sonora in Chihuahuan desertscrub or semi-desert grassland from Agua Prieta east to the Sierra San Luis and possibly in Plains grassland in the southern Animas Valley. |
| Dipsadidae | |
| Hypsiglenajani Duges, 1865 | Likely to occur in tropical deciduous forest and scrubland of southeastern Sonora. |
| Hypsiglenatorquata (Günther, 1860) | Likely to occur in tropical deciduous forest and scrubland of southeastern Sonora. Mulcahy et al. (2014) suggested the snakes in this area might be an undescribed species of Hypsiglena. |
| Rhadinaealaureata (Günther, 1868) | Likely to occur in woodlands of the Sierra Madre Occidental of eastern and northeastern Sonora |
| Leptotyphlopidae | |
| Renadissecta (Cope, 1896) | Expected in Chihuahuan desertscrub, semi-desert grasslands, and into the lower slopes of adjacent mountains along the United States - Mexico border from the Río San Pedro Valley east to the Sierra San Luis, and also in Plains grassland in the southern Animas Valley. |
| Natricidae | |
| Thamnophiselegans (Baird & Girard, 1853) | This species might occur in the Sierras Huachinera and Bacadehuachi and possibly elsewhere in the eastern mountains of Sonora near the Chihuahua border. |
| Viperidae | |
| Sistrurustergeminus (Say, 1823) | Could potentially be found in grasslands along the US – Mexico border from the Río San Pedro Valley east to the Sierra San Luis. |
| Order Testudines | |
| Emydidae | |
| Trachemysscripta (Thunberg, 1792) | This aquatic turtle occurs sparingly as an introduced species in the Colorado River near Yuma, Arizona and in the San Pedro River Valley of Arizona. It could be present along wetted reaches of the Río Colorado in Sonora or in agricultural canals and ditches in that region, and in the Río San Pedro of Sonora near the border with Arizona. |