Shansisuchus shansisuchus (Young 1964) Middle Triassic ~220 mya, was derived from a sister to Fugusuchus and Garjainia and was a sister to Erythrosuchus in the Erythrosuchidae.

Distinct from Garjainia, the skull of Shansisuchus had a lower, angled rostrum with a smaller naris and a larger secondary opening appeared between the naris and antorbital fenestra. The orbit was larger. The anterior dentary was raised.

The cervicals were much smaller and the chevrons apparently much shorter.

Pedal digit V was much reduced, but metatarsal V was wide.

A new specimen, SXMG V 00002, shares more traits with Garjainia.

See Proterosuchus for a local family tree. A more complete tree is here.

Luperosuchus fractus (Romer 1971; Middle Triassic; skull 54cm; length 4.1m est.) is a sister to Shansisuchus, based on the fragmentary skull material that was previously restored by Romer and considered a rauisuchian. Here it nests with other erythrosuchids.

Desojo JB and Arcucci AB 2009. New material of Luperosuchus fractus (Archosauria: Crurotarsi) from the Middle Triassic of Argentina: the earliest known South American ‘Rauisuchian’. Journal of Vertebrate Paleontology 29(4): 1311-1315.

Nesbitt S and Desojo JB 2017. The osteology and phylogenetic position
of Luperosuchus fractus (Archosauria: Loricata) from the latest Middle Triassic or earliest Late Triassic of Argentina. Ameghiniana 54: 261–282.

Romer AS 1971. The Chañares (Argentina) Triassic reptile fauna. VIII. A fragmentary skull of a large thecodont, Luperosuchus fractus. Breviora 373:1-8.

Young C-C 1964. The pseudosuchians in China: Palaeontologia Sincia, v. 151, new series C., n. 19, p. 1-205.

wiki/Shansisuchus
wiki/Luperosuchus