Incertae sedis
Kuhn (1936) described and named a third species of this genus, "Francosuchus angustifrons", on a basis of another skull from the same quarry, bed number 9. This species was recently reassigned to "Paleorhinus", because it shares unique synapomorphies with "P. bransoni" (the type species of "Paleorhinus"), and a species-level phylogenetic analysis of phytosaurs found the species to be sister taxa. Friedrich von Huene (1939) described and named a fourth species, "Francosuchus trauthi". It was synonymized with "Paleorhinus", but a re-description of the species by Butler (2013) found no evidence to support the synonymy, or even a phytosaurian identification. Although it is based solely on a rostrum fragment, ""F." trauthi" was found to possess a unique combination of characters that distinguish it from all other Triassic tetrapods. Thus it was reassigned to a new genus, "Dolerosaurus", referable to Tetrapoda "Incertae sedis".