The four-toed amapasaurus (Amapasaurus tetradactylus) is a lizard that was discovered in 1970 by Osvaldo Rodrigues da Cunha. It is the only species in the genus Amapasaurus.
Most lizards, including most geckos, have five toes. Discovering seven toes on the right forelimb of this Otago/Southland gecko (an adult male) may suggest a developmental abnormality. These extra toes are shorter than a typical first toe, but all have claws, as expected.
Reptiles usually have five digits. Many phalanges have been lost from the bird's wing; the remainder are often elongated for support in flight. The number of digits in mammals varies greatly. In those with five digits (e.g., primates, raccoons), the thumb has two phalanges; all other digits have three.
Description: 3 - 5.5 in (7.5 - 14.5 cm). Ground skinks are small, slender lizards with long tails and short legs. They range from golden brown to almost black in coloration but are most often coppery brown with a darker stripe running along each side of the body. The belly is white or yellowish.
Garden Skink
They may be shy and quick to hide when you approach, but garden skinks are some of the most common and well known buddies in Australian backyards. Male skinks are highly territorial and aggressively attack other males during spring.
The Monaro grassland earless dragon (Tympanocryptis osbornei or 'Osborne's hidden ear dragon') is one of Australia's rarest reptiles. It is small, weighing between six and nine grams, and has a very short lifespan. It lays only three to six eggs once a year, just under the ground where the sun can warm them.
Perenties (Varanus giganteus), the largest known lizards in Australia and the fourth-largest in the world, generally grows to 5–7 ft (1.5–2 m), but can be somewhat larger. A 12 ft (3.6 m) perentie skin allegedly observed by naturalists was thought to have been artificially stretched.
Eastern Water Skinks have a long tail and their back is greenish-greyish brown with small black spots. They also have a white stripe that runs from their eye down the side of their body. Most are around 28 cm long. Eastern Water Skinks live in forests, woodlands and parks and urban gardens in eastern Australia.
Unlike other lizards, skinks have shorter legs and elongated bodies. They appear snake- like and are often described as a snake with legs. Yet, their external ear openings, moveable eyelids and four legs set them apart from snakes.
The common garden skink (Lampropholis guichenoti) is a small species of lizard in the family Scincidae. The species is endemic to Australia. Additional common names for L. guichenoti include grass skink, Guichenot's grass skink, pale-flecked garden sunskink, and penny lizard.
Canines, cats, and birds all have four toes. Canine and cat tracks look very similar, but bird tracks have a very distinct pattern.
But despite all the aye-aye's bizarre features, their hands are perhaps their strangest attribute. The four fingers are primary thumb are long and spindly. “It kind of looks like a cat walking on spiders,” Hartstone-Rose says.
Tetradactyly. Tetradactyly (from Greek τετρα tetra "four") is the condition of having four digits on a limb, as in many amphibians, birds, and theropod dinosaurs.
If you have a chance for a closer look you could count the number of toes on the front pair of legs - newts have four toes, lizards have five.
Tiliqua scincoides is a large lizard species with smooth scales and five equal-length toes. The individual pictured above has cream-orange bands and—as is typical of this subspecies (T. s. intermedia)—lacks a dark streak behind its eye.
Most skinks have well-developed legs and feet with five toes, but some species are legless slitherers, which can be distinguished from snakes by their shiny, uniform scales, their ear-holes, and the structure of their eyelids. Skinks are quick, active animals, and most species are difficult to catch.
There are over 320 species of skinks in Australia. They can range in size from the small common Garden Skink at just 9cm to the large Blue-Tongued Lizard that can get over 40cm long. Most suburban backyards are home to a variety of skinks, but many look similar at a glance.
Many species have long, tapered tails that they can release and break off if they are grabbed by a predator and that they can subsequently grow back. Despite this fact, skinks in captivity should not be picked up or restrained in any way by the tail.
Common garden skinks are found in Adelaide, Melbourne, Perth, Sydney, and Brisbane, but also are common across most of Southern Australia, Tasmania and some of New South Wales. They live in forests, moist woodlands, mountain heaths and are often seen in suburban gardens.
The Eastern Blue‑tongue is the largest Australian skink and can grow to 60cm in length and weigh a kilogram.
Mangrove Monitor
This lizard can grow to be four feet long and is a black or brown color with patterns of light spots. With time, the mangrove monitor can become quite tame.
Garden Skink – the full story
The Garden Skink (Lampropholis guichenoti)) is found in suburban backyards across Australia. They may be shy and quick to hide when you approach, but garden skinks are some of the most common and well known buddies in Australian backyards.
The Komodo dragon is the largest living lizard in the world. These wild dragons typically weigh about 154 pounds (70 kilograms), but the largest verified specimen reached a length of 10.3 feet (3.13 meters) and weighed 366 pounds (166 kilograms).