Cyrilavis colburnorum (Feduccia and Martin 1976, Ksepka, Clarke and Grande 2011; early Eocene, 50 mya) was originally and later considered a small, stem parrot, but here nests as a basal crown neognathid between the most basal crown bird, Megapodius and the collie birds, predatory birds and trumpeters (Psophia).

Type specimen: FMNH PA 754, a skeleton (Figs. 1, 2). Referred specimen: (FMNH PA 722, a complete skull and cervicals (Fig. 3).

Palaeoglaux artophoron (Peters 1992; Middle Eocene) was originally considered an odd sort of owl, but here nests with the basal neonath, Cyrilavis (above), which provides a suitable model for a skull. Note the tail feathers at lower right. These two taxa have identical scores in the LRT.

Feduccia A and Martin LD 1976. The Eocene zygodactyl birds of North America (Aves: Piciformes). Smithsonian Contributions to Paleontology, 27:101–110.

Peters DS 1992. A new species of owl (Aves: Strigiformes) from the Middle Eocene Messel oil shales. In Papers in Avian Paleontology Honoring Pierce Brodkorb. edited by Kenneth Campbell, Jr. NO. 36 Science Series. Natural History Museum of Los Angeles County, Science series No 36: 161-169.

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