†subfamily Polymorphinae Simpson 1945 (placental)
Mammalia - Panameriungulata - Macraucheniidae
Parent taxon: Macraucheniidae according to R. Cifelli 1983
Sister taxa: Amilnedwardsia, Cramaucheniinae, Ernestohaeckelia, Llullataruca, Macrauchenidia, Macraucheniinae, Macrauchenopsis, Notodiaphorus, Pseudomacrauchenia, Rutimeyeria, Victorlemoineia
Subtaxa: none
Ecology: scansorial herbivore
Distribution: there are no occurrences of Polymorphinae in the database