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Sauropsida (Clade: Anapsida (Order: Testudines (Family: Emydidae (Clemmys…

- - - - Clemmys marmorata
        
        fairly plain coloring
      - Chrysemys picta
        
        has colorful stripes
- - - - Family: Scincidae
        
        Eumeces skiltonianus
        
        Oblong head, no noticeable neck
      - Family: Teiidae
        
        Aspidoscelis tigris
        
        checkered pattern
        
        Aspidoscelis velox
        
        striped pattern
        
        Very long tails, pointy heads
      - Family: Iguanidae
        
        Crotaphytus bicinctores
        
        Dark ring around collar
        
        Rounded head shape...usually
        
        Gambelia wislizenii
        
        Pointed head
        
        Large spots
        
        Sceloporus garciosus
        
        blue chin
        
        smooth
        
        Sceloporus occidentalis
        
        blue chin
        
        rough
        
        Phrynosoma douglasii
        
        Short horns relative to head
        
        Uta stansburiana
        
        dark splotch on side near armpit
        
        Phrynosoma platyrhinos
        
        Long horns relative to head
      - Family: Anguidae
        
        Elgaria coerulea
        
        "unalligned stripes"
        
        Elgaria multicarinata
        
        "stripes"
        
        Bulky head, long body, geometric scales/patterns
    - - Family: Colubridae
        
        Hypsiglena torquata
        
        obvious dark saddles behind eyes
        
        Pituophis catenifer
        
        dark band across snout
        
        Coluber mormon
        
        very forward eyes that sit in a groove
        
        Lampropeltis getula
        
        1st stripe starts behind the head
        
        Contia tenuis
        
        hard-sharp pointy tail
        
        Lampropeltis zonata
        
        1st stripe starts at the back of the head
        
        Diadophis punctatus
        
        light ring on neck
        
        Thamnophis sirtalis
        
        large light blocks down the side
        
        dorsal stripe
        
        Thamnophis elegans
        
        dorsal stripe
        
        checkered pattern
        
        Thamnophis ordinoides
        
        dorsal stripe
        
        no obvious blocks down sides
        
        Sonora semiannulata
        
        dorsal bands don't reach belly
        
        Masticophis taeniatus
        
        forward eyes
        
        horizontal striping
        
        very long tail after cloaca
        
        Two pairs of chin shields
      - Family: Crotalidae
        
        Crotalus oreganus
        
        rattle on tail
        
        pits on snout
        
        One pair of chin shields
      - Family: Boidae
        
        Charina botta
        
        very blunt tail
        
        No chin shields