Project 2212: Federico J. Degrange, Claudia P. Tambussi, Matías L. Taglioretti, Alejandro Dondas, Fernando Scaglia. 2015. A New Mesembriornithinae (Aves, Phorusrhacidae) Provides New Insights Into the Phylogeny and Sensory Capabilities of Terror Birds. Journal of Vertebrate Paleontology. 32 (2):e912656.
Specimen: † Llallawavis scagliai (unvouchered)
View: body reconstruction

Abstract

Terror birds constitute the most outstanding group of the South American Cenozoic avifauna. Considered as apex predators, their hunting skills have recently been examined, but their diversity is still unresolved. Here we report a new terror bird from the late Pliocene of Argentina, represented by the most complete articulated skeleton of one yet found. Our phylogenetic analysis places this taxon among derived phorusrhacids (Mesembriornithinae). One of the most striking cranial features of the new species is the suppression of intracranial kinesis due to the presence of an independent ossified bone that increases the structural link between the lacrimal and jugal bars, and the absence of both palatal hinges. The new species possesses ossified tracheal rings and a tracheobronchial syrinx, as well as sclerotic ossicles to adjust the shape of the cornea during its diurnal vision, and reveals a mean hearing sensitivity (∼2300 Hz) below the average for living species. The discovery of this new species provides new insights for studying the anatomy and phylogeny of phorusrhacids and a better understanding of this group's diversification.


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Article DOI: http://dx.doi.org/10.1080/02724634.2014.912656

Project DOI: 10.7934/P2212, http://dx.doi.org/10.7934/P2212
This project contains
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  • 3 Documents
  • 1 Taxon
  • 1 Specimen
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MorphoBank Project 2212

    Authors' Institutions

    • Museo Municipal de Ciencias Naturales Lorenzo Scaglia

    • Universidad Nacional del Mar de la Plata

    • Universidad Nacional de Cordoba (UNC)

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)



    Members

    member name taxa specimens media
    MorphoBank Curator
    Project Administrator
    Last logged in 07/14/15
    000
    Maureen Admin
    Full membership
    Last logged in 01/24/20
    111
    Federico Degrange
    Full membership
    Last logged in Never
    000


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    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project212
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    Document downloads11Degrange et al. JVP - Llallawavis scagliai SI2 matrix (6 downloads); Degrange et al. PDF (3 downloads); Nexus file (2 downloads);
    Media downloads1M381639 (1 download);