The earless monitor, Lanthanotus borneensis Steindachner, 1878, from Sarawak on the island of Borneo. This extremely rare species grows to about 45 cm/18 inches in total length, but has been the subject of many studies far in excess of its physically diminutive stature. Photo from exhibit at the American Museum of Natural History by Dr. Robert Sprackland.

Lanthanotus means "with hidden ears" in Greek, in reference to the absence of external ear openings. Lanthanotus is the only known living platynotan without ear openings.