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Heloderma is a genus of toxicoferan lizards that contains five species, all of which are venomous. [1] It is the only extant genus of the family Helodermatidae.
The Mexican beaded lizard (Heloderma horridum) or beaded lizard is a species of lizard in the family Helodermatidae, one of the two species of venomous beaded lizards found principally in Mexico and southern Guatemala.
The Helodermatidae or beaded lizards are a small family of lizards endemic to North America today, mainly found in the Isthmus of Tehuantepec in Oaxaca, the central lowlands of Chiapas, on the border of Guatemala, and in the Nentón River Valley, [1] though they were formerly more widespread in the ancient past.
The Gila monster (Heloderma suspectum, / ˈ h iː l ə / HEE-lə) is a species of venomous lizard native to the Southwestern United States and the northwestern Mexican state of Sonora. It is a heavy, slow-moving reptile, up to 56 centimetres (22 in) long, and it is the only venomous lizard native to the United States.
The Rio Fuerte beaded lizard (Heloderma exasperatum) is a venomous species of beaded lizard in the family Helodermatidae. It is found in the tropical forests and shrublands of western Mexico, specifically around the Rio Fuerte and Rio Mayo basins. It is often found in or near abandoned mammal burrows and sources of water. [4] [5]
Heloderma charlesbogerti — Reiserer , Schuett & Beck , 2013 The Guatemalan beaded lizard ( Heloderma charlesbogerti ), also called commonly the Motagua Valley beaded lizard , is a highly endangered species of beaded lizard , a venomous lizard in the family Helodermatidae .
Heloderma alvarezi, the Chiapan beaded lizard or black beaded lizard, is a species of lizard of the Helodermatidae family. [2] It is found in Mexico and Guatemala.
Heloderma texana is an extinct species of heloderm lizard known from Miocene sediments in Big Bend National Park. [2] It is the oldest fossil record of the genus Heloderma in North America. [ 3 ]