Poll and Norell (2004) recovered Sichuanosuchus as sister to Shantungosuchus and Zosuchus based on the presence of a ventrally deflected posterior region of the mandibular rami.[1] Buscalioni (2017) recovered Sichuanosuchus as sister to Shantungosuchus, Zosuchus, and Shartegosuchidae,[2] and Dollman et al. (2018) went further by erecting Shartegosuchoidea for the clade formed by Shartegosuchidae, Sichuanosuchus, Zosuchus, and Shantungosuchus.[3]
References
^Pol, D. & Norell, M. A., (2004). "A new crocodyliform from Zos Canyon, Mongolia". American Museum Novitates 3445: 1-36.
^Kathleen N. Dollman; James M. Clark; Mark A. Norell; Xu Xing; Jonah N. Choiniere (2018). "Convergent evolution of a eusuchian-type secondary palate within Shartegosuchidae". American Museum Novitates. 3901: 1–23. doi:10.1206/3901.1.