Species in the genus Laemanctus are commonly referred to as conehead lizards or casquehead iguanas.

The plane of the top of the head slopes forward, and the occipital region is raised and extends beyond the occiput.

The body is laterally compressed, and is covered with imbricate keeled scales.

The limbs are very long, and the infradigital lamellae have a median tubercle-like keel.

[2] The genus Laemanctus consists of four species which are recognized as being valid.