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,
The Lizard Culdrose is a major contributor to the economy of The Lizard area. The Lizard peninsula is in the St Ives parliamentary constituency (which comprises the whole of the former district of Penwith and the southern part of the former district of Kerrier). However, the parishes northeast of the Helford River are in Camborne and Redruth parliamentary constituency To the north, The Lizard peninsula is bordered by the civil parishes of Breage, Porthleven, Sithney, Helston, Wendron, Gweek and — across the Helford River — by Constantine, Kerrier and Mawnan. The parishes on the peninsula proper are (west to east): The Lizard's