Snout in lateral profile square, not rounded above, and in dorsal profile rounded with pointed tip resulting from vertical Rostral keel; canthus pronounced; loreal region barely concave; lips thick, rounded, and barely flaring; nostrils protuberant; internarial distance, 3.2 mm.
"A Review of the Middle American Tree Frogs of the Genus Ptychohyla"
William E. Duellman
It bears no resemblance to the depressed Rostral hump of Lyriocephalus, and the differences of the new species from the latter lizard may be easily seen from the annexed drawing and the notes given below.
"Sketches of the Natural History of Ceylon"
J. Emerson Tennent
The nasal plate triangular, interposed between the Rostral plate and the frontal ones, with the nostrils in its centre; loreal plates two, square; labial plates large; ears none, only a very indistinct sunk dot in their place.
"Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2)"
George Grey