Langobardisaurus pandolfii (Renesto 1994a) Norian, Late Triassic ~ 210mya, ~15 cm in length was derived from Macrocnemus and was a sister to Tanytrachelos and Tanystropheus.
Distinct from Macrocnemus, the skull of Langobardisaurus was shorter and dominated by a huge orbit. The upper temporal bar bisected the orbit and the posterior cranium was depressed. The procumbent premaxillary teeth were transformed into a narrow rake-like configuration. The posterior teeth were broader and multi-cusped, as in the smaller Tanystropheus.
The cervical series was longer and more gracile, but still composed of eight vertebrae. Eleven caudals bore transverse processes. The tail tip is unknown, but rapid dimunition suggests a short caudal series.
The scapula and coracoid were relatively smaller. The scapula was strap-like. The manus was relatively smaller with shorter digits.
The ilium was elongated both anteriorly and posteriorly. The ischium was narrow proximally. The pedal digits were shorter. Digits II-IV were the same length. Pedal 5.1 was greatly elongated and extended nearly to the distal end of metacarpal IV. Pedal 5.4 extended as far as p3.4.
With a cropping muzzle, grinding, slicing teeth, a high coronoid and the ability to rise on their hind legs and reach high places with their long necks, it appears possible that the langobardisaurs were the only plant-eating macrocnemids. Occasional biepdal locomotion appears possible (Renesto, Dalla Vecchia & Peters 2002).