Description of the skull of the genus Syluiornis Poplin, 1980 (Aves, Galliformes, Sylviornithidae new family), a giant extinct bird from the Holocene of New Caledonia.

catalaEl crani de Sylviornismostra una articulacio craniarostral completament mobil, amb dos condils articulars situats sobre el rostrum, el qual s'insereix al crani en dues superficies articulars allargades. La presencia de dos procesos rostropterigoideus sobre el basisfenoide del rostrum i la forma dels palatins permet confirmar que aquest genere pertany als Galliformes, pero les caracteristiques altament derivades del crani justifiquen el seu emplacament a una nova familia, extingida, Sylviornithidae. El crani de Syluiornis esta extremadament eixamplat i dorsoventralment aplanat, mentre que el rostrum es massis, lateralment comprimit, dorsoventralment aixecat i mostra unes cristae tomiales molt fondes. El rostrum exhibeix un ornament ossi gran. La mandibula mostra una simfisi molt allargada, les branques laterals tambe presenten unes cristae tomiales fondes, i la part posterior de la mandibula es molt gruixada. Es discuteix el possible origen i l'alimentacio de Syluiornis. EnglishThe skull of Syluiornis shows a completely mobile craniorostral articulation, with two articular condyles situated on the rostrum, which insert into two elongated articular surfaces on the cranium. The presence of two rostropterygoid processes on the basisphenoid rostrum and the shape of the palatines make it possible to confirm that this genus belongs to the Galliformes, but the highly derived characteristics of the skull justify its placement in a new, extinct family Sylviornithidae. The cranium of Syluiornis is extremely widened and dorsoventrally flattened, while the rostrum is massive, laterally compressed, dorsoventrally raised and displays very sharp cristae tomiales. The rostrum bears a large bony ornament. The mandible shows a very elongated symphysis, the lateral branches also show sharp cristae tomiales, and the posterior part of the mandible is very thick. The possible diet of Syluiornis is discussed.

• Publication year

  2005

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  Unknown venue

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• Fields of study

  Biology

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  Open on Semantic Scholar

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  Semantic Scholar

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