Data from: New heterodontosaurid remains from the Cañadón Asfalto Formation: cursoriality and the functional importance of the pes in small heterodontosaurids
Data files
Jun 22, 2016 version files 55.98 MB
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Supplamental_Data_11 Fig 6 caption.doc
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Supplamental_Data_15 References of Suppl Data.doc
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Supplamental_Data_2 Fig 1 caption.doc
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Supplamental_Data_3 Fig 2 caption.doc
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Supplamental_Data_4 Fig 3 caption.doc
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Supplamental_Data_5 Fig 4 caption.doc
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Supplamental_Data_6 Fig 5 caption.doc
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Supplemental_Data_1 Table 1 measurements MPEF-PV 3826.xls
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Supplemental_Data_10 Character list and data matrix.doc
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Supplemental_Data_11 Fig 6 phylogenetic results.tif
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Supplemental_Data_12 Table 5 data ternary.xls
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Supplemental_Data_13 Table 6 PCA results.xls
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Supplemental_Data_14 Table 7 data curvature unguals.xls
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Supplemental_Data_2 Fig 1 isolated vertebrae copy.tif
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Supplemental_Data_3 Fig 2 vertebrae in metatarsals copy.tif
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Supplemental_Data_4 Fig 3 phalanges in metatarsals copy.tif
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Supplemental_Data_5 Fig 4 isolated phalanges copy.tif
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Supplemental_Data_6 Fig 5 histologic section in color copy.tif
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Supplemental_Data_7 Table 2 Cluster analysis.xls
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Supplemental_Data_8 Table 3 distance matrix.xls
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Supplemental_Data_9 Table 4 ultrametric matrix.xls
Abstract
New ornithischian remains reported here (MPEF-PV 3826) include two complete metatarsi with associated phalanges and caudal vertebrae, from the late Toarcian levels of the Cañadón Asfalto Formation. We conclude that these fossil remains represent a bipedal heterodontosaurid but lack diagnostic characters to identify them at the species level, although they probably represent remains of Manidens condorensis, known from the same locality. Histological features suggest a subadult ontogenetic stage for the individual. A cluster analysis based on pedal measurements identifies similarities of this specimen with heterodontosaurid taxa and the inclusion of the new material in a phylogenetic analysis with expanded character sampling on pedal remains confirms the described specimen as a heterodontosaurid. Finally, uncommon features of the digits (length proportions among nonungual phalanges of digit III, and claw features) are also quantitatively compared to several ornithischians, theropods, and birds, suggesting that this may represent a bipedal cursorial heterodontosaurid with gracile and grasping feet and long digits. In particular, the elongated non-terminal pedal phalanges and morphology of digit III resemble features present in arboreal birds, a unique condition found so far among ornithischians.