Knobscaled lizard

Xenosaurus grandis

TAXONOMY

Xenosaurus grandis Gray, 1856, Mexico, near Cordova [= Veracruz]. Five subspecies are recognized: X. g. agrenon, X. g. ar-boreus, X. g. grandis, X. g. rackhami, and X. g. sanmartinensis.

OTHER COMMON NAMES None known.

PHYSICAL CHARACTERISTICS

In general form X. grandis is similar to other xenosaurids, although it differs in some aspects of scalation and dorsal coloration. Xenosaurus grandis also has strikingly red eyes.

DISTRIBUTION

Xenosaurus grandis has the largest geographic range of any xenosaurid, ranging from west-central Veracruz, Mexico, to Guatemala. However, it is possible that X. grandis is actually composed of several, as yet undescribed, species.

HABITAT

Tropical forest.

BEHAVIOR

Xenosaurus grandis is one of the more solitary species of xenosaurids, with the vast majority of individuals living alone in their crevices.

FEEDING ECOLOGY AND DIET

Xenosaurus grandis eats a wide range of arthropods.

I Xenosaurus grandis I Xenosaurus newmanorum

REPRODUCTIVE BIOLOGY

The reproduction of X. grandis has been studied in two populations, one in Veracruz, Mexico (X. grandis grandis), and one in Oaxaca, Mexico (X. grandis agrenon). The Veracruz population has the largest litters in the family (mean = 5.1), whereas the Oaxaca population has a litter size similar to the rest of the family (mean = 3.2).

CONSERVATION STATUS

Unknown, but likely susceptible to habitat changes.

SIGNIFICANCE TO HUMANS None known. ♦

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