The beaded lizard or Mexican beaded lizard (Heloderma horridum) is found in Mexico and the southern United States. Along with the Gila monster (Heloderma suspectum), it was once thought to be one of only two lizards known to be venomous until recent research showed that some Iguanas and Monitor lizards also produce venom. Their venom is similar to that of some snakes (e.g., the western diamondback rattler). There are a number of subspecies, including H. h. exasperatum, H. h. alvarezi, and H. h. horridum. Adult Mexican beaded lizards range from 13 to 18 inches (33 to 46 cm) in length. Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Subregnum Parazoa Porifera (sponges) Subregnum Agnotozoa Placozoa (trichoplax) Orthonectida (orthonectids) Rhombozoa (dicyemids) Subregnum Eumetazoa Radiata (unranked) (radial symmetry) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anemones) Bilateria (unranked) (bilateral symmetry) Acoelomorpha (basal) Orthonectida (parasitic to flatworms, echinoderms, etc. ... Typical Classes Subphylum Urochordata - Tunicatas Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Orders See text. ... Suborders Amphisbaenia - Worm lizards Sauria- Lizards Serpentes - Snakes Squamata (scaled reptiles) is the largest recent order of reptiles, including lizards and snakes. ... Classification Genus Heloderma Heloderma horridum: Mexican beaded lizard Heloderma suspectum: Gila monster Categories: Lizards | Helodermas ... Classification Genus Heloderma Heloderma horridum: Mexican beaded lizard Heloderma suspectum: Gila monster Categories: Lizards | Helodermas ... In biology, binomial nomenclature is the formal method of naming species. ... Arend Friedrich August Wiegmann (1802 - German zoologist. ... Binomial name Heloderma suspectum Cope, 1869 The Gila monster (Heloderma suspectum) is a species of lizard that was once thought to be one of only two species of venomous lizards. ... Families Many, see text. ... It has been suggested that Snake poison be merged into this article or section. ... Genera Amblyrhynchus Brachylophus Conolophus Ctenosaura Cyclura Dipsosaurus Iguana Sauromalus Frost et al. ... Species Many, see text. ... Species 27 species; see list of rattlesnake species and subspecies. ... In zoology, as in other branches of biology, subspecies is the rank immediately subordinate to a species. ...
References
Berkow, Robert, Ed. (1992). The Merck Manual, 16th Ed.. Merck Research Laboratories. ISBN 0911910-16-6.
Until very recently, it was thought that only two lizard species were venomous: the Mexican beadedlizard and the closely-related Gila monster, both of which live in northern Mexico and the southwest United States.
The chief impact of lizards on humans is positive; they are significant predators of pest species; numerous species are prominent in the pet trade; some are eaten as food (for example, iguanas in Central America); and lizard symbology plays important, though rarely predominant roles in some cultures (e.g.
Lizards in the Scincomorpha family, which include skinks (such as the blue-tailed skink), often have shiny, iridescent scales that appear moist.
Lizards form the suborder Sauria, and there are over 3,000 lizard species distributed throughout the world (except for the polar regions), with the greatest number found in warm climates.
Lizards typically have four legs with five toes on each foot, although a few, such as the worm lizard and the so-called glass snake, are limbless, retaining only internal vestiges of legs.
The gila monster and the related beadedlizard of the North American deserts are the only known poisonous lizards; despite folklore, the bite of the gecko is not poisonous.
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