Vytshegdosuchus

Vytshegdosuchus is an extinct genus of paracrocodylomorph archosaur known from the Early Triassic (latest Olenekian stage) Yarenskian Gorizont of the Komi Republic of the European section of Russia. It contains a single species, Vytshegdosuchus zheshartensis. Vytshegdosuchus was named by Andreii Sennikov in 1988.

Vytshegdosuchus is known from the holotype PIN 3361/134, a right ilium, and possibly from the paratype PIN 3361/127, a partial femur. These specimens were collected from the a fossil assemblage called the Parotosuchus fauna of the Upper Yarenskian Gorizont, in the Zheshart locality along the Vychegda River in Aikino district of the Komi Republic. A pterygoid and postcranial material from the Gam locality, a cervical vertebra (PIN 3369/139) from another locality and postcrania from the Mezhog locality were also assigned to Vytshegdosuchus by Sennikov (1999). Nesbitt (2009) argued that the specimens referred to Vytshegdosuchus cannot unambiguously be assigned to that taxon, as these localities are well separated, and the bones were found isolated. Vytshegdosuchus occurs with the erythrosuchian Garjainia and the possibe proterosuchian Gamosaurus and demonstrates there was clear temporal overlap with paracrocodylomorph archosaurs and at least erythrosuchians as predicted earlier by phylogenetic analyses. A similar faunal assemblage is present in the Heshanggou Formation of China, which dates to the late Early and possibly early Middle Triassic, as evidenced by the cooccurrence of the basal erythrosuchian Fugusuchus and the poposauroid Xilousuchus.