Eoalulavis hoyasi

Eoalulavis (from the Ancient Greek: Éōs, "dawn"; alula, "bastard wing"; avis, "bird") is a monotypic genus of enantiornithine bird that lived during the Barremian, in the Lower Cretaceous around 125 million years ago. The only known species is Eoalulavis hoyasi.

Its remains came from the Konservat-Lagerstätte of Las Hoyas, Cuenca, Spain. The holotype (LH13500), housed in the collection of Museo de las Ciencias de Castilla-La Mancha (), consists on both slab and counterslab preserving mainly the thoracic region, part of the neck and both almost complete forelimbs of an adult specimen. It also preserves remains of the body, primary, secondary feathers and a bastard wing which have been covered by layers of limonite as a result of the fossilization process. The preservation is consistent with the taphonomic processes associated with obruption, stagnation and the action of microbial mats in the locality that have yielded a wide variety of examples of soft-tissue preservation (e.g., connective tissues in fishes and theropods or insect wings). Most of the osteological features of the holotype became apparent only after its acid preparation and transference to a resin cast.