Podilymbini is a potential

tribe The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide use of the term in English is in the discipline of anthropology. The definition is contested, in part due to conflict ...

of waterbirds belonging to the family Podicipedidae containing the genera '' Podilymbus'' and '' Tachybaptus''. In comparison to Podicipedini, podilymbins are characterized by the lack of nuptial plumes and the chicks have rufous down in one or more patches on the crown. They are able to stand upright and move around land more so. The mating displays among these birds are simpler. There is uncertainty for the tribe, however, due to different morphological studies suggesting different interpretations of the tribe. Bochenski (1994) using comparative osteology studies found Podilymbini to also include the genera '' Poliocephalus'' and '' Rollandia''. In his paper he found ''Podilymbus'' to be basal most of tribe while ''Tachybaptus'' is paraphyletic to ''Rollandia''. Fjeldså (2004) using a more comprehensive ecomorphological dataset found support of just ''Podilymbus'' and ''Tachybaptus'' as traditionally stated by Storer (1963). Ksepka et al. (2013) also conducted a morphological analysis and found ''Podilymbus'' to be the sister genus ''Rollandia''. Both genera were found to be closer to '' Aechmophorus'' and '' Podiceps'', while ''Poliocephalus'' and '' Thiornis'' to be closer to ''Tachybaptus''.

References

Podicipediformes Bird tribes {{Podicipediformes-stub