;"S. canastra (n = 6)";"S. tricristatus (n = 1)";"S. dumerilii (n = 15)";"S. quinarius (n = 11)";"S. squarrosus (n = 12)" "SVL in adult males";"70–77 mm";"58 mm";"84–104 mm";"65–75 mm";"76–88 mm" "Body shape";"Slightly depressed";"Slightly compressed";Depressed;Depressed;"Strongly depressed" "Tail shape";"Nearly cylindrical to slightly compressed";"Compressed near base, cylindrical distally";"Depressed near base, cylindrical distally";"Depressed near base, cylindrical distally";"Depressed, blunt and thick toward end" "Tail length/SVL";1.4–1.8;1.7;1.2–1.4;1.0–1.1;0.8–0.9 "Head shape ventrally";"Elongated, neck distinct";"Broad, neck distinct";"Elongated, neck poorly distinct";"Elongated, neck poorly distinct";"Elongated, neck poorly distinct" Interparietal;Large;Large;Small;Large;Large "Supraciliaries in dorsal view";"2 (rarely 3)";2;"4 (rarely 3)";4;4 "Preauricular scale";"Enlarged, projecting, smooth";"Not enlarged, projecting, keeled";"Not enlarged, not projecting";"Not enlarged, only slitghtly projecting";"Not enlarged, only slitghtly projecting" "Mental scales";Subequal;Subequal;"Anterior ones distinctly smaller";"Anterior ones distinctly smaller";"Anterior ones distinctly smaller" "Vertebral crest";"Prominent, serrate, to proximal part of tail";"Prominent, serrate, tail?";"Low, not on tail";"Low (sliglhtly serrated ant.), to base of tail";"Low, to base of tail" "Dorsolateral crest";"Prominent, serrate, to base of tail";"Prominent, serrate";"Low, not on tail";"Low or serrate, to base of tail; stronger on neck";"Prominent, serrate, to base of tail; stronger on neck" "Lateral crests";"Visible, but less conspicuous in 2 out of 6 specimens";"Uncertain, but apparently absent";"Low, may be rather inconspicuous";"Serrate, stronger on neck";"Serrate, very strong on neck" "Mid-lateral crest*";Absent;Absent;"Present, variable in extension";Absent;Absent Dorsals;"High keels, mucronate";"High keels, mucronate";"Low keels, not or hardly mucronate";"Low keels, not or hardly mucronate";"Low keels, not or hardly mucronate" "Dorsals at midbody";8–9;7–8;11–14;13–15;13–15 "Scales at midbody";39–41;33;41–50;47–56;47–53 "Color pattern";"Back and flanks densely covered by bands/blotches";"Back and flanks densely covered by bands/blotches";"Back with sparse blotches or uniform";"Uniform or some sparse blotches on back";"Back with sparse blotches or uniform"