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,
Mexican mole lizard Mexican mole lizard The Mexican mole lizard (Bipes biporus), commonly known as the five-toed worm lizard, or simply as "Bipes", is a species of amphisbaenian, which is endemic to the Baja California Peninsula. It is one of four species of amphisbaenians that have legs. It should not be confused with the axolotl, a salamander ("Ambystoma mexicanum"), which is usually called "ajolote" in Spanish. It is commonly found in Baja California. They are pink, worm-like lizards, snout-to-vent length and in width, that live for one to two years. Their skin is closely segmented to give a corrugated appearance, and like earthworms,