Narrow-beaked trogons from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK)

Abstract We describe multiple partial skeletons of a new trogon species from the early Eocene London Clay Walton-on-the-Naze (Essex, UK), which are among oldest fossils Trogoniformes. Eotrogon stenorhynchus , gen. et sp. nov. has much narrower and more gracile beak than extant trogons, denotes different ecological attributes fossil species. already had heterodactyl foot characterising even though trochlea for second toe is smaller in crown group Differences to trogons wing pectoral girdle elements suggest that E. was less adapted short-term hovering, may indicate foraging techniques. also report tarsometatarsus Miocene France likely belong Paratrogon gallicus previously only known humeri. P. earliest modern-type trogon, we show newly identified does not support proposed referral this African taxon Apaloderma . identify skeletal features sister relationship between all other Trogoniformes, but exact affinities remain poorly resolved. ( http://zoobank.org/urn:lsid:zoobank.org:pub:73B64B84-11C2-4D50-8540-099CF86B6CA1 ).