†subfamily Polymorphinae Simpson 1945 (eutherian)
Mammalia - Eutheria - Macraucheniidae
PaleoDB taxon number: 336245
Parent taxon: Macraucheniidae according to R. Cifelli 1983
Sister taxa: Amilnedwardsia, Cramaucheniinae, Cullinia, Ernestohaeckelia, Llullataruca, Macrauchenia, Macraucheniinae, Macraucheniopsis, Macrauchenopsis, Notodiaphorus, Pseudomacrauchenia, Rutimeyeria, Victorlemoineia, Xenorhinotherium
Subtaxa: none
Ecology: scansorial insectivore