| Trogonophids Temporal range: | |
|---|---|
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| Trogonophis wiegmanni | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Clade: | Amphisbaenia |
| Family: | Trogonophidae Gray, 1865 |
| Genera | |
Four, see text. | |
Trogonophidae (Palearctic worm lizards or desert ringed lizards) is a small family of amphisbaenians, containing six species in four genera.
Trogonophids are found in North Africa, the Horn of Africa, the Arabian Peninsula, and western Iran. [1]
Trogonophids are limbless, carnivorous, lizard-like reptiles highly modified for burrowing. They construct their tunnels with an oscillating motion that forces soil into the walls. Unlike other amphisbaenians, their teeth are fused to their jaws, rather than lying in a groove. [1]
The following four genera are recognized as being valid. [2]
The following fossil taxa are also known: [3] [4]
Terastiodontosaurus from the Early or Middle Eocene of Tunisia is the largest known worm lizard to have ever existed, with an estimated total length of nearly 90 centimetres (35 in). [5] Todrasaurus from the Late Paleocene of Morocco is the earliest known species. [4]
Amphisbaenia is a group of typically legless lizards, comprising over 200 extant species. Amphisbaenians are characterized by their long bodies, the reduction or loss of the limbs, and rudimentary eyes. As many species have a pink body and scales arranged in rings, they have a superficial resemblance to earthworms. While the genus Bipes retains forelimbs, all other genera are limbless. Phylogenetic studies suggest that they are nested within Lacertoidea, closely related to the lizard family Lacertidae. Amphisbaenians are widely distributed, occurring in North America, Europe, Africa, South America, Western Asia and the Caribbean. Most species are less than 6 inches (15 cm) long.
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.
Dibamidae or blind skinks is a family of lizards characterized by their elongated cylindrical body and an apparent lack of limbs. Female dibamids are entirely limbless and the males retain small flap-like hind limbs, which they use to grip their partner during mating. They have a rigidly fused skull, lack pterygoid teeth and external ears. Their eyes are greatly reduced, and covered with a scale.
The Lacertidae are the family of the wall lizards, true lizards, or sometimes simply lacertas, which are native to Afro-Eurasia. It is a diverse family with at about 360 species in 39 genera. They represent the dominant group of reptiles found in Europe.
Gymnophthalmidae is a family of lizards with at least 250 species, sometimes known commonly as spectacled lizards or microteiids. They are called "spectacled" because of their transparent lower eyelids, which allow them to still see with closed eyes. As in most lizards, except geckos, these eyelids are movable. The Alopoglossidae have been recently moved from this family.
The Amphisbaenidae are a family of amphisbaenians, a group of limbless vertebrates.
Legless lizard may refer to any of several groups of lizards that have independently lost limbs or reduced them to the point of being of no use in locomotion. It is the common name for the family Pygopodidae. These lizards are often distinguishable from snakes on the basis of one or more of the following characteristics: possessing eyelids, possessing external ear openings, lack of broad belly scales, notched rather than forked tongue, having two more-or-less-equal lungs, and/or having a very long tail. Every stage of reduction of the shoulder girdle —including complete loss— occurs among limbless squamates, but the pelvic girdle is never completely lost regardless of the degree of limb reduction or loss. At least the ilium is retained in limbless lizards and most basal snakes.
Rhineura floridana, known commonly as the Florida worm lizard, graveyard snake, or thunderworm, is a species of amphisbaenian in the family Rhineuridae. The species is the only extant member of the genus Rhineura, and is found primarily in Florida but has been recorded in Lanier County, Georgia. There are no subspecies that are recognized as being valid.
Rhineuridae is a family of amphisbaenians that includes one living genus and species, Rhineura floridana, as well as many extinct species belonging to both Rhineura and several extinct genera. The living R. floridana is found only in Georgia and Florida, but extinct species ranged across North America, some occurring as far west as Oregon. The family has a fossil record stretching back 60 million years to the Paleocene and was most diverse in the continental interior during the Eocene and Oligocene.
Bedriaga's fringe-fingered lizard is a species of lizard in the family Lacertidae. The species is endemic to Algeria.
The Iberian worm lizard, Mediterranean worm lizard, or European worm lizard is a species of reptile in the family Blanidae of the clade Amphisbaenia. The Iberian worm lizard is locally known as cobra-cega (Portuguese), culebrilla ciega (Spanish), and colobreta cega (Catalan), all meaning "blind snake". Recent studies into the mitochondrial and nuclear genomic data of 47 isolated B. cinereus populations show rather large sequence divergence between two apparent clades, leading some researchers to call for a division of the Iberian worm lizard into two species. While little is known of B. cinereus in comparison with some other reptile species, new insight is growing about this primitive, ancestral reptile.
Blanus, also known as worm lizards, are a genus of amphisbaenians found in the Mediterranean region of Europe and North Africa. Like other amphisbaenians, Blanus species are specialized for a subterranean existence, with long, slender bodies, reduced limbs, and rudimentary eyes. Their skulls are powerfully constructed, allowing them to push through soil to create a burrow. Their jaws are well-developed, with large, recurved teeth and a pair of canine-like teeth in the upper jaw.
The checkerboard worm lizard is a species of amphisbaenian in the family Trogonophidae. The species is monotypic within the genus Trogonophis, and is endemic to North Africa. Its natural habitats are temperate forests, Mediterranean-type shrubby vegetation, temperate grassland, sandy shores, arable land, and pastureland. It is threatened by habitat loss.
The short worm lizard is a species of reptile in the Trogonophidae family. It is monotypic within the genus Pachycalamus. It is found on the island of Socotra.
Zarudny's worm lizard is a species of amphisbaenian reptile in the family Trogonophidae. The species is monotypic within the genus Diplometopon. The species is native to the Middle East.
Amphisbaena ridleyi, known by the common names Ridley's worm lizard or the Noronha worm lizard, is a species of amphisbaenian in the family Amphisbaenidae. The species is endemic to the island of Fernando de Noronha off the coast of Brazil. It is one of two indigenous reptiles on the island.
Ancylocranium is a genus of amphisbaenians, commonly known as sharp-snouted worm lizards, in the family Amphisbaenidae. Three species are placed in this genus, which is endemic to eastern Africa and the Horn of Africa.
Dalophia is a genus of amphisbaenians in the family Amphisbaenidae, commonly known as worm lizards. Seven species are placed in this genus, all of them endemic to Africa.
King's worm lizard is a species of amphisbaenian in the family Amphisbaenidae. The species is endemic to South America.
Monopeltis capensis, also known commonly as the Cape spade-snouted worm lizard, the Cape wedge-snouted worm lizard, the Cape worm lizard, and the South African shield-snouted amphisbaenian, is a species of amphisbaenian in the family Amphisbaenidae. The species is native to southern Africa.
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