Cordylidae is a family of small- to medium-sized lizards that occur in southern and eastern

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

. They are commonly known as girdled lizards, spinytail lizards, or girdle-tail lizards. Cordylidae is closely related to the family

Gerrhosauridae The Gerrhosauridae are a family of lizards native to Africa and Madagascar. Habitat Also known as plated lizards, species in the family Gerrhosauridae live in a range of habitats, from rocky crevices to sand dunes. Description Their form is var ...

, occurring in Africa and Madagascar. These two scientific families of lizards, known as Cordyliformes or Cordyloidea, are sometimes combined into a larger concept of Cordylidae. Recent molecular analyses confirm the clade made up of Cordylidae and Gerrhosauridae (Cordyloidea) and place it in a larger clade including Xantusiidae ( Cordylomorpha Vidal & Hedges, 2009).Nicolas Vidal; S. Blair Hedge
The molecular evolutionary tree of lizards, snakes, and amphisbaenians
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Description and behavior

Girdled lizards are diurnal and

insectivorous A robber fly eating a hoverfly An insectivore is a carnivorous animal or plant that eats insects. An alternative term is entomophage, which can also refer to the human practice of eating insects. The first vertebrate insectivores were ...

. They are terrestrial, mostly inhabiting crevices in rocky terrain, although at least one species digs burrows and another lives under exfoliating bark on trees. They have flattened heads and bodies, and are distinguished by a heavy armour of

osteoderm Osteoderms are bony deposits forming scales, plates, or other structures based in the dermis. Osteoderms are found in many groups of extant and extinct reptiles and amphibians, including lizards, crocodilians, frogs, temnospondyls (extinct amp ...

s and large, rectangular, scales, arranged in regular rows around the body and tail. Many species have rings of spines on the tail, that aid in wedging the animal into sheltering crevices, and also in dissuading predators. Most species have four limbs, but those in the genus '' Chamaesaura'' are almost entirely limbless, with only tiny spikes in place of the hind limbs. The family includes both egg-laying and ovoviviparous species.

Genera

References

External links

Cordylidae
{{Taxonbar, from=Q840980 Lizard families Taxa named by Leopold Fitzinger