A 2013 study found A. crassidens and A. eurygnathus to be nomina dubia, with A. platystomus possibly belonging to a separate, yet unnamed genus. A 2021 study found A. crassidens to be a valid genus within Anhangueridae, while A. platystomus was placed in the new genus Draigwenia. A. eurygnathus was found to possibly be a junior synonym of A. crassidens.
A 2013 study deemed A. crassidens and A. eurygnathus as uncertain names, proposing that A. platystomus might belong to an unnamed genus. In 2021, the study validated A. crassidens within Anhangueridae and placed A. platystomus in a new genus, while A. eurygnathus was considered possibly a junior synonym of A. crassidens.