Fossil birds from the Late Cretaceous Los Alamitos Formation,Río Negro Province,Argentina |
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| Authors: | Federico L Agnolin Agustín G Martinelli |
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| Institution: | 1. Instituto Superior de Correlación Geológica (INSUGEO), Universidad Nacional de Tucumán — CONICET, Miguel Lillo 205, 4000 Tucumán, Argentina;2. Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro — CONICET, Av. Roca 1242, General Roca 8332, Río Negro, Argentina;3. Universidad Nacional de Salta — CONICET, Complejo Universitario Castañares, 4400 Salta, Argentina;4. Instituto del Cenozoico INCE, Universidad Nacional de Salta, Complejo Universitario Castañares, 4400 Salta, Argentina |
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| Abstract: | In this note we report new avian remains from the Late Cretaceous Los Alamitos Formation (Campanian-Maastrichtian) at the Los Alamitos locality, Río Negro Province, Argentina. Isolated remains referable to indeterminate Aves, ?Patagopterygiformes, indeterminate Ornithurae, cf. Hesperornithes and cf. Neornithes are described and discussed. The new genus and species Alamitornis minutus is erected to include a minute-sized and gracile bird, probably related to the non-volant ratite-like bird Patagopteryx. If correctly identified, the record of Hesperornithes may be the first for this group in the Southern Hemisphere. The Los Alamitos paleoavifauna represents one of the most diverse fossil bird assemblage from the Mesozoic of Gondwana known to date. |
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