Lanthanotus borneensis (Wiegmann 1829) is the earless monitor lizard, an extant helodermatid derived from a sister to Heloderma. Overall length ~20 cm. The position of the naris is similar to that of Varanus by convergence. The limbs of this burrowing lizards are reduced. The postorbital region was elongated as in Cylindrophis and the jugal is reduced.

Tepexisaurus tepexii (Reynoso 2000; Early Cretaceous; IGM-370) is a small lizard found in a Mexican quarry. Here it nests derived from the Heloderma + Lanthanotus and Prolacertoides.

Cifelli RL and Nydam RL. 1995. Primitive, helodermatid-like platynotan from the early cretaceous of Utah. Herpetologica. 51(3):286-29

Reynoso VH 2000. A new scincomorph lizard from the Early Cretaceous of Puebla, México Zoological Journal of the Linnean Society (2000), 130: 183–212.

Wiegmann AFA 1829. Über die Gesetzlichkeit in der geographischen Verbreitung der Saurier. Isis (Oken) 22 (3-4): 418–428.

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