Youngosuchus sinensis (Kalandadze and Sennikov 1985; originally Vjushkova sinensis Young 1973; Early Triassic ~240 mya; the lectotype (a skull roof, PIN 951/59) and isolated skull and postcranial bones (PIN 951/1–40, 46, 54–64, 69, 70, 78–105; IVPP V3239) nests at the base of the Rauisuchidae. Youngosuchus is ancestral toDecuriasuchus and the clade that includes Arizonasaurus and Ticinosuchus. It was derived from Euparkeria and Ornithosuchus.

Compared to Euparkeria, the skull of Youngosuchus the naris was elongated and dorsal in position. The antorbital fenestra was triangular with the apex posterior. The orbit was smaller. The postorbital was more gracile but the squamosal was deeper and more robust. The retroarticular process was less distinct.

The cervicals are more robust and taller. There is an S-curve produced in the series. The dorsal neural spines are taller. No osteoderms are present along the spine.

Asperoris mnyama (Nesbitt et al., 2013, NHMUK PV R36615) is a sister to Vjushkovia. Nesbitt et al's 2013 phylogenetic analysis resulted in a strict consensus tree with Asperoris in a polytomy or unresolved phylogenetic relationship with Erythrosuchus, Vancleavea, the proterosuchid clade, and the clade including Euparkeria, phytosaurs, and Archosauria. Vjushkovia was not included and Vancleavea is a thalattosaur.

Nesbitt SJ, Butler RJ and Gower DJ 2013. A New Archosauriform (Reptilia: Diapsida) from the Manda Beds (Middle Triassic) of Southwestern Tanzania. PLoS ONE 8(9): e72753. http://www.plosone.org/

Young CC 1973. On the occurrence of Vjushkovia in Sinkiang. Memoirs of the Institute of Vertebrate Paleontology and Paleoanthropology. 10: 38–52.

wiki/Asperoris
wiki/Youngosuchus