Laemanctus serratus, also known commonly as the serrated casquehead iguana, is a species of lizard in the family Corytophanidae.

The species is native to southeastern Mexico and Central America.

L. serratus is found in the Mexican states of Campeche, Chiapas, Hidalgo, Oaxaca, Puebla, Querétaro, Quintana Roo, San Luis Potosí, Tamaulipas, Veracruz, and Yucatán, and also in the countries of Belize, Guatemala, and Honduras.

[2] The preferred natural habitat of L. serratus is forest[1] L. serratus has enlarged triangular scales along the posterior margin of the head casque, and a serrated middorsal crest.

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