Article
Interordinal relationships of birds and other reptiles based on whole mitochondrial genomes.
Systematic biology - 1 Mar 1999
Mindell D P, Sorenson M D, Dimcheff D E, Hasegawa M, Ast J C, Yuri T
Abstract excerpt
Several different groups of birds have been proposed as being the oldest or earliest diverging extant lineage within the avian phylogenetic tree, particularly ratites (Struthioniformes), waterfowl (Anseriformes), and shorebirds (Charadriiformes). Difficulty in resolving this issue stems from several factors, including the relatively rapid radiation of primary (ordinal) bird lineages and the lack of characters...
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