Mexican beaded lizard generic name "Heloderma" means "studded skin", from the Ancient Greek words "hêlos" (ἧλος)—the head of a nail or stud—and "dérma" (δέρμα), meaning skin. Its specific name, "horrĭdum", is the Latin word meaning rough or rude. The four subspecies of beaded lizard, elevated to full species in 2013, are: Adult beaded lizards range from in length. They are substantially larger than the Gila monster, which only reaches lengths of . The snout-to-vent length of a beaded lizard averages . The average body mass of an adult beaded lizard is , about 45% heavier than the average mass of a gila monster,
Abbott's crested lizard Abbott's crested lizard Abbott's crested lizard ("Gonocephalus abbotti") is a species of lizard in the Agamidae family. It is endemic to Thailand. Both the specific name, "abbotti", and the common name are in honor of American naturalist William Louis Abbott. It is also known as Abbot's anglehead lizard. Abbott's crested lizard is about in total length (including tail). The most distinctive anatomical features are the triangular bony crest on the face and the upturned nose. The colors of the dragon range from tan to green with light and dark dots on the body. The most common color is an olive