. The Bulletin of zoological nomenclature. Zoology. Clade stemming from \ ^^s^Y/^-^ least inclusive clade the most recent common \ J containing ancestor of Struthio camelus \ / Stnrthlo camelus and and Corvus corax \ / Corvus corax Aves {Struthio camelus + Corvus corax) Aves Crocodylus niloticus / \ Aves Clade consisting of \ I \ / The most inclusive Struthio camelus and \ / W / clade containing all organisms shanng a \ I / I Struthio camelus but more recent common ancestor \\ / / not Crocodylus niloticus with Struthio camelus than with Crocodylus niloticus Aves (Struthio camelus •+- Crocodylu
. The Bulletin of zoological nomenclature. Zoology. Clade stemming from \ ^^s^Y/^-^ least inclusive clade the most recent common \ J containing ancestor of Struthio camelus \ / Stnrthlo camelus and and Corvus corax \ / Corvus corax Aves {Struthio camelus + Corvus corax) Aves Crocodylus niloticus / \ Aves Clade consisting of \ I \ / The most inclusive Struthio camelus and \ / W / clade containing all organisms shanng a \ I / I Struthio camelus but more recent common ancestor \\ / / not Crocodylus niloticus with Struthio camelus than with Crocodylus niloticus Aves (Struthio camelus •+- Crocodylus niloticus) Aves s S. Aves character feafrjers^ \ V J S y feathers homologous g^o^^^in \ v-^ sassss*. Aves (feathers in Struthio camelus) d Figure 1. A phylogeny and the three definitions in which the PhyloCode suggests naming. The definitions to the left of each alternative include reference to ancestors, those on the right do not. Below each of the alternatives the shorthand code suggested by the PhyloCode is given, a. A phylogeny showing a lineage of taxa leading to birds and their modern sister-group, b. node based definition, c. Stem based definition, d. Apomorphy based Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original International Commission on Zoological Nomenclature. London : International Trust for Zoological Nomenclature
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