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 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 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 Mexican beaded lizard (Heloderma horridum) is the most famous of the four species of venomous beaded lizards found principally in Mexico and southern Guatemala. They and their congener (member of the same genus) the Gila monster (Heloderma suspectum) are the only lizards known to have evolved an overt venom delivery system.

3 days ago · Gila monster, one of two species of North American venomous lizards in the genus Heloderma of the family Helodermatidae. The Gila monster was named for the Gila River basin and occurs in the southwestern U.S. and northern Mexico.

Anatomy and morphology of Heloderma - Photos and text: The inner and outer organs of Heloderma,skull with dentition, isolated and prepared organs, hatching problems - deformations

Mar 29, 2023 · A Gila monster, heloderma suspectum, out on an evening forage. These venomous reptiles are native to the deserts of the American Southwest and Northwestern Mexico.

Jul 30, 2015 · Molecular evidence suggests Heloderma went through a long period of stasis before the Mexican beaded lizard split off around 10 million years ago, and another long period of stasis followed before the three other beaded lizards …

The genus Heloderma has existed since at least the early Miocene (about 23 million years ago). Today only two species remain: the Gila monster (Heloderma suspectum) and the Mexican beaded lizard or escorpíon (H. horridum). The two species are readily distinguished from each other by the Mexican beaded lizard's proportionately longer tail (at ...

Helodermatidae consists of one genus and two species, Heloderma suspectum and H. suspectum, which are found in the southwestern United States and Mexico respectively. They live in relatively arid habitats with some rainfall and ground soft enough for digging.