Sororavis
''Sororavis'' is an extinct genus of bird from the Early Eocene London Clay of Walton-on-the-Naze, United Kingdom. It contains a single named species, ''Sororavis solitarius''. It is a member of the Morsoravidae. Discovery and naming The holotype of ''Sororavis'', NMS.Z.2021.40.75, was discovered in 1986 by the late Michael Daniels, a fossil collector who also collected other specimens of Early Eocene zygodactyl birds and numerous other birds. The fossil was collected from the Walton Member of the London Clay, of lower Ypresian age (between 54.6 and 55 million years old), near the town of Walton-on-the-Naze. It consists of the tip of an upper beak, fragments of the mandible, the coracoids, parts of the furcula and sternum, portions of the humerus, humeri and an ulna, portions of the tibiotarsus, tibiotarsi and tarsometatarsus, tarsometatarsi, and several phalanges. Mayr & Kitchener (2023) named the new genus and species ''Sororavis solitarius'' based on these remains, also ere ...
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