Rhinophrynidae as well as all its descendants. It is broadly equivalent to Xenoanura. The synapomorphies that define Pipoidea are the absence of mentomeckelian...

Xenoanura Acosmanura...

Xenoanura Acosmanura...

Pipidae. The clade formed by these two genera is sometimes referred to as Xenoanura or superfamily Pipoidea. Extant genera: Rhinophrynus or Mexican burrowing...

data on the osteology and development of Avitabatrachus uliana (Anura, Xenoanura), a pipimorph from the Candeleros Formation, mid Cretaceous of northwestern...