Eogrus
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Eogruidae is a family of large, flightless birds that inhabited Asia from the Eocene to Pliocene epochs. It has been suggested that the family is paraphyletic, with Ergilornithidae more closely related to modern ostriches than to Eogrus or Sonogrus.
Eogruids were formerly considered to be Gruiformes within the crane-limpkin-trumpeter line, Gruoidea, the exception being Olson 1985 which declared them to be stem-ostriches. A study in 2021 based on newly described remains found that eogruids and the related Ergilornithidae are indeed members of Struthoniformes.
Eogruids are rather similar to Geranoididae, a clade of similar flightless gruiforms from North America and Europe, and both groups have occasionally been classified as sister taxa. Recently geranoidids have been recovered as basal to the rest of Gruoidea, however, while eogruids are sister-taxa to cranes
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Eogruidae is a family of large, flightless birds that inhabited Asia from the Eocene to Pliocene epochs. It has been suggested that the family is paraphyletic, with Ergilornithidae more closely related to modern ostriches than to Eogrus or Sonogrus.
Eogruids were formerly considered to be Gruiformes within the crane-limpkin-trumpeter line, Gruoidea, the exception being Olson 1985 which declared them to be stem-ostriches. A study in 2021 based on newly described remains found that eogruids and the related Ergilornithidae are indeed members of Struthoniformes.
Eogruids are rather similar to Geranoididae, a clade of similar flightless gruiforms from North America and Europe, and both groups have occasionally been classified as sister taxa. Recently geranoidids have been recovered as basal to the rest of Gruoidea, however, while eogruids are sister-taxa to cranes