This dataset contains the digitized treatments in Plazi based on the original journal article Läng, Émilie, Goussard, Florent (2007): Redescription of the wrist and manus of? Bothriospondylus madagascariensis: new data on carpus morphology in Sauropoda. Geodiversitas 29 (4): 549-560, DOI: 10.5281/zenodo.4651066
Redescription of the wrist and manus of? Bothriospondylus madagascariensis: new data on carpus morphology in Sauropoda
Émilie LÄNG Florent GOUSSARD
Muséum national d’Histoire naturelle, Département Histoire de la Terre, USM 0208-UMR 5143 CNRS “Paléobiodiversité et Paléoenvironnements”, case postale 38, 57 rue Cuvier, F-75231 Paris cedex 05 (France)
lang@mnhn.fr
goussard@mnhn.fr Läng É. & Goussard F. 2007. — Redescription of the wrist and manus of? Bothriospondylus madagascariensis: new data on carpus morphology in Sauropoda. Geodiversitas 29 (4): 549-560.
ABSTRACT
Except for some rare exceptions, the arrangement of the carpus remains poorly understood among sauropodomorphs, mainly because of a bad preservation in the fossil record. When preserved, it is difficult to identify the carpal elements, which are rarely found in articulation. Whereas the carpus of Prosauropoda is relatively well known by the remains of Massospondylus and Plateosaurus, the structure of the sauropod carpus is still unknown and subject to many interpretations so far. Here, we redescribe the manus and the wrist of? Bothriospondylus madagascariensis, a Bathonian (Middle Jurassic) sauropod from the Majunga Basin in Madagascar, previously described by Lavocat in 1955. The wrist consists of five carpal elements, an unusual disposal among sauropods, which typically preserves most of the time three or fewer carpal bones. Moreover, these five carpal elements are arranged in three carpal rows, another unexpected feature regarding to other sauropods. The comparison of the Malagasy carpus with that of an hypothetical basal archosaur leads us to propose a new hypothesis of homology for the carpus of? Bothriospondylus. Therefore, this specimen would consist in: a radiale, the fused distal carpal 1 with the intermedium and one or two centrales, and three distal elements (distal carpal 2, distal carpal 3, and distal carpal 4 or distal carpal 4 + ulnare).
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