Geckos are small, mostly carnivorous lizards that have a wide distribution, found on every continent except Antarctica. Belonging to the infraorder Gekkota, geckos are found in warm climates throughout the world. They range from 1.6 to 60 centimetres.
Gekkonidae is the largest family of geckos, containing over 950 described species in 62 genera. The Gekkonidae contain many of the most widespread gecko species, including house geckos (Hemidactylus), the tokay gecko (Gekko), day geckos (Phelsuma), the mourning gecko (Lepidodactylus), and dtellas (Gehyra). Gekkonid geckos occur globally and are particularly diverse in tropical areas. Many species of these geckos exhibit an adhering ability to surfaces through Van der Waals forces utilizing intermolecular forces between molecules of their setae and molecules of the surface they are on.
Pygopodidae, commonly known as snake-lizards, or flap-footed lizards, are a family of legless lizards with reduced or absent limbs, and are a type of gecko. The 47 species are placed in two subfamilies and eight genera. They have unusually long, slender bodies, giving them a strong resemblance to snakes. Like snakes and most geckos, they have no eyelids, but unlike snakes, they have external ear holes and flat, unforked tongues. They are native to Australia and New Guinea.
Eurydactylodes is a small genus of geckos commonly referred to as chameleon geckos from the subfamily Diplodactylidae, endemic to New Caledonia and few adjacent islands. Within the Diplodactylidae, Eurydactylodes resides in the Carphodactylini tribe, and consists of four species. All species share similar morphology as well as lifestyle and habits. The first of the Eurydactylodes species to be classified, E. vieillardi, was discovered in 1869.
Underwoodisaurus is a small genus of Australian lizards in the family Carphodactylidae. Member species are commonly known as thick-tailed geckos, along with the species Uvidicolus sphyrurus.
Uvidicolus is a monotypic genus of lizard in the family Carphodactylidae. The genus contains the sole species Uvidicolus sphyrurus, also known commonly as the border thick-tailed gecko. The species is endemic to Australia.
Burton's legless lizard is a species of lizard in the family Pygopodidae. The species lacks forelegs and has only rudimentary hind legs. Pygopodid lizards are also referred to as "legless lizards", "flap-footed lizards" and "snake-lizards". This species is native to Australia and Papua New Guinea.
The Phyllodactylidae are a family of geckos (Gekkota) consisting of 163 species in 10 genera, distributed throughout the New World, North Africa, Europe and the Middle East. The family was first delineated based on a molecular phylogenetic analysis in 2008, and all members possess a unique single codon deletion in the phosducin (PDC) gene. The phyllodactylid genus Bogertia has been recently synonymized with Phyllopezus. The name of the family comes from the leaf shaped fingers.
The Diplodactylidae are a family in the suborder Gekkota (geckos), with over 150 species in 25 genera. These geckos occur in Australia, New Zealand, and New Caledonia. Diplodactylids are the most ecologically diverse and widespread family of geckos in both Australia and New Caledonia, and are the only family of geckos found in New Zealand. Three diplodactylid genera have recently been split into multiple new genera.
Hoburogekko is an extinct genus of stem-group gecko that includes a single species, Hoburogekko suchanovi, from the Early Cretaceous Dzunbain Formation of Mongolia. It is known from two fossil specimens, one preserving the front part of the skull and the other preserving part of the lower jaw. Hoburogekko is one of four known Mesozoic geckos or gecko-like lizards, the others being Cretaceogekko from the Early Cretaceous of Burma, AMNH FR21444, an undescribed specimen from a slightly older deposit in Mongolia, and Gobekko from the Late Cretaceous of Mongolia. Hoburogekko is the third oldest known gecko behind AMNH FR21444 and Cretaceogekko.
Gekkonomorpha is a clade of lizards that includes geckos and their closest relatives. Although it was first named in 1900, Gekkonomorpha was not widely used as a formal taxon until it was given a phylogenetic definition in the 1990s. Under this definition, Gekkonomorpha is a stem-based taxon containing the node-based taxon Gekkota, the group that includes the last common ancestor of all living geckos and its descendants. The extent of Gekkonomorpha beyond gekkotans differs between studies. For example, Lee (1998) defined Gekkonomorpha in such a way that it included not only Gekkota but the legless amphisbaenian and dibamid lizards as well. The phylogenetic analysis of Conrad (2008), which did not support a close relationship between geckos and legless lizards, used Gekkonomorpha in a much more restrictive sense so that it included only Gekkota and a few extinct lizards more closely related to Gekkota than to any other living group of lizards. Some of the most recent phylogenetic analyses suggest that the extinct lizards Gobekko and Parviraptor may be stem gekkotans, although other analyses find that Gobekko may instead be within Gekkota and Parviraptor outside Gekkonomorpha.
Lucasium byrnei, also known commonly as the gibber gecko, Byrne's gecko, and the pink-blotched gecko, is a species of small, nocturnal lizard in the family Diplodactylidae. The species is endemic to Australia.
Nephrurus sheai, also known commonly as the Kimberley rough knob-tailed gecko and the northern knob-tailed gecko, is a species of lizard in the family Carphodactylidae. The species is endemic to Australia.
Nephrurus wheeleri, also known commonly as the banded knob-tailed gecko, the southern banded knob-tailed gecko, and Wheeler's knob-tailed gecko, is a species of lizard in the family Carphodactylidae. The species, like all species of Nephrurus, is endemic to Australia.
Amalosia jacovae, also known commonly as the clouded gecko or the clouded velvet gecko, is a species of lizard in the family Diplodactylidae. The species is endemic to Australia.
Diplodactylus fulleri, sometimes called the Lake Disappointment ground gecko, is a species of gecko, a lizard in the family Diplodactylidae. The species is endemic to Australia.
The Mount Augustus spiny-tailed gecko, also known commonly as the Mount Augustus striped gecko and Wilson's spiny-tailed gecko, is a species of lizard in the family Diplodactylidae. The species is endemic to Australia.
Pygopodoidea is a gecko superfamily and the only taxon in the gekkotan subclade Pygopodomorpha. The clade includes three Australasian families: Diplodactylidae, Carphodactylidae, and Pygopodidae. Traditional gekkotan systematics had considered Diplodactylidae and Carphodactylidae as subfamilies of the family Gekkonidae, but recent molecular work have placed Pygopodidae within Gekkonidae making it paraphyletic. These analyses have shown support of Pygopodidae and Carphodactylidae being sister taxa, with Diplodactylidae occupying a basal position in Pygopodoidea.
The Zuytdorp worm-lizard, also known commonly as Smith's legless lizard, is a species of lizard in the family Pygopodidae. The species is endemic to Australia.
The olive legless lizard is a species of legless gecko from the Pygopodidae family. This species is commonly found throughout the Australian Capital Territory, New South Wales, Queensland, Victoria and southeastern South Australia, mostly inhabiting areas consisting of dry to temperate southern grasslands and grassy woodlands.
