[1] Shuvosaurids were an unusual family of reptiles belonging to the group Poposauroidea; although their closest modern relatives are crocodilians, they were bipedal and lightly armored, with dinosaur-like hip and skull structures.

[2] The holotype specimen of Sillosuchus, PVSJ 85, is a partial skeleton discovered in sediments of the Ischigualasto Formation, Cancha de Bochas Member in the Ischigualasto-Villa Unión Basin in northwestern Argentina.

[1][2] Possible additional remains were first described by Dr. William Sill in 1974, though he referred them to Saurosuchus, a giant quadrupedal predator distantly related to Sillosuchus.

[3] One specimen, PVL 2472, includes fragments of the tibia, ankle, and a large isolated cervical (neck vertebra), 20 cm (7.9 in) long.

Nesbitt (2011) briefly reconsidered these large fragments, and found that they showed several distinctive features akin to the Sillosuchus holotype, mostly differing in their much larger size.