Based on the skull's large
orbits (eye holes) and weak sutures, the specimen was likely a juvenile. Most of the skull bones were externally textured by radiating pits and furrows, with both sparse large pits and numerous tiny pits as in basal
lanthanosuchoids. The only smoothly textured bones of the skull roof were the
maxilla,
squamosal, and
quadratojugal. The maxilla was long and narrow, possessing conical teeth which only differed from each other in a slight shortening trend towards the rear of the maxilla. The maxillary tooth count was 32 or 33, more than any other parareptile apart from
Lanthanosuchus. Although the
lacrimal was not complete, the internal texture of the overlapping maxilla indicates that it extended to the
nares (nostril holes), a trait also observed in
millerettids,
pareiasaurs, and
bolosaurids. The slit-like opening of
Microleter is proportionally similar to that of
Nyctiphruretus, although differs in the participation of the postorbital in its border. However, other parareptiles with postorbital participation (
Australothyris and
lanthanosuchids) have their opening fully surrounded by bone, while that of
Microleter is open from below. The rear of the skull is not very long, with a broad
parietal, small
supratemporal, solitary
postparietal, and tall, boxy squamosal and quadratojugal which are excavated along their rear edge. Most of the
palate is obscured by overlapping bones. The
palatine is very broad, while the transverse flange of the
pterygoid is oriented forwards. What can be seen of the braincase indicates that
Microleter had tubular paroccipital processes, rather than fan-shaped ones present in other parareptiles. The elongated
dentary is ornamented with small pits, but its teeth are obscured and cannot be properly counted. The
surangular possesses a folded ridge on its outer surface, and encompasses the front half of a hole at the rear of the jaw. The rear half of the hole is edged by the
articular bone.
Microleter is one of the few parareptiles to have preserved part of the
scleral ring, which was formed by tall, concave plates. A few
cervical vertebrae are the only fossilized postcranial elements, but they are poorly preserved. == Classification ==