Naming
Four subspecies of ''S. serrifer'' are recognized, including the nominate race, but the subspecies are known to intergrade in areas where their geographic ranges overlap, so differentiating them can be difficult.⤷ ''S. s. cyanogenys'' Cope, 1885
⤷ ''S. s. plioporus'' H.M. Smith, 1939 - West Gulf spiny lizard
⤷ ''S. s. prezygus'' H.M. Smith, 1942
⤷ ''S. s. serrifer'' Cope, 1866 - Yucatán spiny lizard
References:
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