At its upper edge are some broken air cells which are closed in by the ethmoid and lacrimal bones.
12.
The lacrimal bone formed the lower front margin of the orbit, and its surface had rows of node-like ornamentation.
13.
At it is a single lacrimal canal, which opens near the suture between the frontal and lacrimal bones, like in lipotyphlans.
14.
It is constricted in the middle by bony projections of the lacrimal bone in the front and the postorbital bone at the rear.
15.
The rear branch of the praemaxilla touches the lacrimal bone and features a prominent opening at this point, on the rear underside.
16.
The supraorbital ridge has well-developed anterior and posterior lobes and the lacrimal bone projects prominently from the anterior wall of the orbit.
17.
Medially it is thin, and, becoming separated from the medial palpebral ligament, attaches to the lacrimal bone at its posterior crest.
18.
Present on the margin of the orbit, the palatine takes the place of the lacrimal bone, which usually touches the orbit in temnospondyls.
19.
As of 1990, up to 16 subspecies are recognised, which are divided into four regional groupings based on skull height and lacrimal bone length.
20.
Low, laterally raised bony ridges were present on the dorsolateral margin of the nasal and lacrimal bones in the skull, directly above the antorbital fenestra.
