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MONOPHYLY OF THE FALCONIFORMES BASED ON SYRINGEAL MORPHOLOGY (15045 words) |
 | III Cathartidae Accipitrinae I Pandioninae Falconidae Sagittariidae Stresemann and Amadon 1979 Cathartidae Accipitrinae Falconinae Pandionidae Strigidae Sagittariidae Cracraft 1981 Cathartidae Ciconiidae Accipitridae Pandionidae Sagittariidae Falconidae Sibley and Ahlquist 1990 Fig. |
| The curvature of the pelvic girdle is described by Ligon as having a slight angle above the antitrochanter in the Ciconi- idae and Cathartidae, and a 45 ø angle in the Accipitridae. |
| Similarly, the lo- cation of the anterior iliac crest is intermediate in the Cathartidae compared to the other two families, as is the crossing of the coracoidal sul- ci, the shape of the ilioischiatic fenestra, and the angle at which the bicipital crest joins the humeral shaft. |
| Falconiformes - Wikipedia, the free encyclopedia (381 words) |
| However, in Europe, it has become common to split the order into two: the falcons and caracaras remain in the order Falconiformes (about 60 species in 4 groups), while the remaining 220-odd species (including the Accipitridae—eagles, hawks, and many others) are placed in the separate order Accipitriformes. |
| The American Ornithologist's Union leaves Falconidae and Accipitridae in Falconiformes, but places the New World vultures (family Cathartidae) with the storks in Ciconiiformes following the influential Sibley-Ahlquist taxonomy, in which all the raptors are placed into Ciconiiformes, but the Cathartids are considered to be outside the lineage that includes other raptors. |
| The idea that Falconiformes should be divided into many orders, is because of the suggestion that the order may not share a single lineage that is exclusive of other birds, and the most controversial suggestion is that Cathartidae are not Falconiformes but are related to the storks, in the separate order, Ciconiiformes. |
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