Gracilisuchus stipanicicorum (Romer 1972) Ladinian, Middle Triassic, ~230 mya, 30 cm long, was derived from as sister to Trialestes and preceded Scleromochlus and Saltopus at the base of the crocodylomorpha and Herrerasaurus at the base of the Dinosauria. Gracilisuchus was originally considered an ornithosuchid by Romer (1972). Others considered it to nest between Parasuchus and Stagonolepis (Benton and Clark 1988), as the sister to Postosuchus (Juul 1994) or Postosuchus and Erpetosuchus (Benton and Walker 2002)
Distinct from Trialestes, the skull of Gracilisuchus had a larger orbit and a straighter maxilla ventral rim. The mandible had a narrower fenestra. The teeth were not so large. The ventral mandible was straighter. The pterygoids met at the midline.
Distinct from Turfanosuchus the cervicals were more robust and their ribs were more robust and strongly angled. The dorsal ribs had costal processes that proximally widened each one. The tail was shorter with deeper chevrons.
The scapula was smaller. The coracoid had an anterior embayment.
The ilium had a horizontal dorsal margin. The simple mesotarsal hinge ankle was present. The metatarsals were compact. Digit 5 was absent.