|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|A. M. Báez and B. Sanchiz 2007||Small anuran that shares only with pipoids the joint presence of an azygous frontoparietal and a parasphenoid lacking subotic alae, but differs from them in having 9 presacral vertebrae. It differs from Rhadinosteous and rhinophrynids in having the atlas formed by fusion of Vertebrae I and II, and metacarpals exceeding 75% the length of the radioulna. It differs from all known pipimorphs in the presence of a complete maxillary arch and can be further distinguished from crown pipids in the presence of a T−shaped squamosal, pedicellate teeth, a parahyoid bone, and a bicondylar articulation between sacrum and urostyle. It also differs from Thoraciliacus and Cordicephalus in its narrower braincase, a frontoparietal forming a flat dorsal table, and tiny scapular cleft and it can be distinguished from palaeobatrachids in having a T−shaped squamosal lacking processes on the ventral ramus, an articulation for the lower jaw at the midlevel of the otic capsules, a monovertebral sacrum, slightly expanded sacral diapophyses, and a coracoid lacking a conspicuous rostral process and having a slightly expanded sternal end.|