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,
Transvaal grass lizard on slopes and ridges. This lizard is ovoviviparous, meaning mothers carry eggs inside their bodies until they are ready to hatch. Neither the Southern African Red Data nor the International Red Data list the Transvaal grass lizard. However, the Swaziland Red Data puts the lizard at Near Threatened levels. The scientific name of this lizard, Chamaesaura aenea, is due to the lizard's copper color. Aenea is a Latin word meaning "bronze" or "copper." Transvaal grass lizard The Transvaal grass lizard, also known as the Coppery grass lizard and Transvaal snake lizard, is a species of lizard in the genus Chamaesaura.