Junggarsuchus sloani (Clark et al. 2004; Ruebenstahl et al. 2022; IVPP V14010) nests as the basalmost crocodilomorph, basal to Pseudhesperosuchus and likely just as bipedal. It was originally considered a sphenosuchian nesting between Dibothrosuchus and Protosuchus and basal to extant crocodilians.

Pseudhesperosuchus jachaleri (Bonaparte 1969; Norian, Late Triassic ~210my; PVL 3830; ~2 m in length), was derived from a sister to Lewisuchus and was at the base of basal crocodylomorph clade that included Trialestes, close to the base of the Dinosauria.

Much larger and distinct from Lewisuchus, the skull of Pseudhesperosuchus had a smaller antorbital fenestra, an arched lateral temporal fenestra, a deeper maxilla and a large mandibular fenestra. The 7 cervicals were attended by robust ribs. 

The scapula and coracoid were each rather slender and elongated. An straight interclavicle was present. The forelimbs were long and slender. The radiale and ulnare were elongated, a croc trait. Only three metacarpals and no digits are known. 

The ilium was relatively small, but probably longer than tall and not perforated. The femur remained longer than the tibia. The tarsus, if that astragalus is identified correctly, included a simple hinge ankle joint. Only two conjoined partial metatarsals are known. 

The archosaur family tree is here. The complete reptile tree can be seen here.

Bonaparte JF 1969. Dos nuevos "faunas" de reptiles triásicos de Argentina. Gondwana Stratigraphy. Paris: UNESCO. pp. 283–306.

Butler RJ. et al. 2014. New clade of enigmatic early archosaurs yields insights into early pseudosuchian phylogeny and the biogeography of the archosaur radiation. BMC Evol. Biol. 14, 128.

Clark JM et al. 2000. A new specimen of Hesperosuchus agilis from the Upper Triassic of New Mexico and the interrelationships of basal crocodylomorph archosaurs. Journal of Vertebrate Paleontology 20 (4): 683–704.
doi:10.1671/0272-4634(2000)020[0683:ANSOHA]2.0.CO;2.

Clark JM, Xu X, Forster CA and Wang Y 2004. A Middle Jurassic ‘sphenosuchian’ from China and the origin of the crocodilian skull. Nature 430:1021-1024.

Drymala SM and Zanno LE 2016. Osteology of Carnufex carolinensis (Archosauria: Psuedosuchia) from the Pekin Formation of North Carolina and Its Implications for Early Crocodylomorph Evolution. PLoS ONE 11(6): e0157528. doi:10.1371/journal.pone.0157528

Müller RT 2024. A new small-sized predatory pseudosuchian archosaur from the Middle-Late Triassic of Southern Brazil. Sci Rep 14, 12706; online

Nesbitt SJ 2011. The early evolution of archosaurs: relationship and the origin ofmajor clades. Bull. Amer. Mus. Nat. Hist. 352, 1–292.

Ruebenstahl AA et al. 2022. Anatomy and relationships of the early diverging
Crocodylomorphs Junggarsuchus sloani and Dibothrosuchus elaphros. The Anatomical Record DOI: 10.1002/ar.24949

Zanno LE, Drymala S, Nesbitt SJ and Schneider VP 2015. Early Crocodylomorph increases top tier predator diversity during rise of dinosaurs. Scientific Reports 5:9276 DOI: 10.1038/srep09276.

wiki/Pseudhesperosuchus
wiki/Junggarsuchus
wiki/Carnufex
wiki/Parvosuchus