Wannchampsidae is an extinct family of neosuchian crocodyliforms known from the mid-Cretaceous of the United States. The family includes the genera Thikarisuchus (Blackleaf Formation, Montana), and Wannchampsus Twin Mountains Formation, Texas), as well as the unnamed 'Glen Rose form' (Antlers Formation, Texas, and Cloverly Formation, Montana).

Classification

In their phylogenetic analysis, Allen et al. (2025) recovered Thikarisuchus as a member of an unresolved clade also including Wannchampsus and an unnamed specimen nicknamed the 'Glen Rose form' (USNM 22039). The authors named this clade Wannchampsidae. This group is the sister taxon to Atoposauridae, which is in turn the sister to Paralligatoridae. These results are displayed in the cladogram below:

NeosuchiaOther †neosuchians †Hylaeochampsidae Crocodylia †Bernissartia †Paralligatoridae †Atoposauridae †Wannchampsidae †Thikarisuchus †Wannchampsus †'Glen Rose form' (USNM 22039)
Other †neosuchians
†Hylaeochampsidae Crocodylia †Bernissartia †Paralligatoridae †Atoposauridae †Wannchampsidae †Thikarisuchus †Wannchampsus †'Glen Rose form' (USNM 22039)
†Hylaeochampsidae
Crocodylia †Bernissartia †Paralligatoridae †Atoposauridae †Wannchampsidae †Thikarisuchus †Wannchampsus †'Glen Rose form' (USNM 22039)
Crocodylia
†Bernissartia †Paralligatoridae †Atoposauridae †Wannchampsidae †Thikarisuchus †Wannchampsus †'Glen Rose form' (USNM 22039)
†Bernissartia
†Paralligatoridae †Atoposauridae †Wannchampsidae †Thikarisuchus †Wannchampsus †'Glen Rose form' (USNM 22039)
†Paralligatoridae
†Atoposauridae †Wannchampsidae †Thikarisuchus †Wannchampsus †'Glen Rose form' (USNM 22039)
†Atoposauridae
†Wannchampsidae†Thikarisuchus †Wannchampsus †'Glen Rose form' (USNM 22039)
†Thikarisuchus
†Wannchampsus
†'Glen Rose form' (USNM 22039)