[2] Similar membranes are also found in several other extinct reptiles such as kuehneosaurids and Mecistotrachelos, as well as living gliding lizards, although each group evolved these structures independently.

The phalanges of the hands and feet are elongate contrasting strongly with those of most other primitive diapsids, but are similar to those of modern arboreal lizards.

[4][3] Unique to weigeltisaurids, the group possesses between 25 and 30 pairs of long, hollow rod-like bones, which project from the lower abdomen dubbed "patagials".

Preserved fossils show that the bony rods had a high degree of flexibility, similar to the ribs of living gliding lizards.

[3] In living gliding lizards, it has been found that the forelimbs grab hold of the membrane during takeoff, allowing them to adjust their trajectory mid-flight.

[10] It has been controversially proposed that they are closely related to the drepanosaurs, a group of arboreal diapsids native to northern Pangaea during the Late Triassic.