Novaeratitae | |
---|---|
Portrait of a southern cassowary ( Casuarius casuarius) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Infraclass: | Palaeognathae |
Clade: |
Novaeratitae Yuri et al., 2013 |
Orders | |
Novaeratitae is a proposed clade that was originally defined to contain the recent common ancestors of the orders Casuariiformes ( emus and cassowaries) and Apterygiformes ( kiwis). [1] [2] Recently it has been determined that the elephant birds of the extinct order Aepyornithiformes were the closest relatives of the kiwis, and therefore are part of this group. [3] The implication is that ratites had lost flight independently in each group, as the elephant birds are the only novaeratites found outside Oceania. [3] This clade has been contested by other studies, which find the relationships between the four main clades of non-ostrich palaeognaths (moa+tinamou, kiwi+elephant bird, rheas, and emus+cassowaries) to be an unresolved polytomy, with only slightly more genetic support for Novaeritiae over alternative proposals. [4]
Novaeratitae | |
---|---|
Portrait of a southern cassowary ( Casuarius casuarius) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Infraclass: | Palaeognathae |
Clade: |
Novaeratitae Yuri et al., 2013 |
Orders | |
Novaeratitae is a proposed clade that was originally defined to contain the recent common ancestors of the orders Casuariiformes ( emus and cassowaries) and Apterygiformes ( kiwis). [1] [2] Recently it has been determined that the elephant birds of the extinct order Aepyornithiformes were the closest relatives of the kiwis, and therefore are part of this group. [3] The implication is that ratites had lost flight independently in each group, as the elephant birds are the only novaeratites found outside Oceania. [3] This clade has been contested by other studies, which find the relationships between the four main clades of non-ostrich palaeognaths (moa+tinamou, kiwi+elephant bird, rheas, and emus+cassowaries) to be an unresolved polytomy, with only slightly more genetic support for Novaeritiae over alternative proposals. [4]