1. A juvenile Tuarangisaurus keyesi Wiffen and Moisley 1986 (Plesiosauria, Elasmosauridae) from the Upper Cretaceous of New Zealand, with remarks on its skull ontogeny
- Author
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Marianna Terezow, Jose Patricio O'gorman, Joseph A.W. McKee, William L. Moisley, and Rodrigo A. Otero
- Subjects
010506 paleontology ,Tuarangisaurus ,Ontogeny ,Postcrania ,Zoology ,Biology ,010502 geochemistry & geophysics ,01 natural sciences ,Paleontología ,Ciencias de la Tierra y relacionadas con el Medio Ambiente ,medicine ,Juvenile ,JUVENILE ,0105 earth and related environmental sciences ,WEDDELLIAN PROVINCE ,Holotype ,Paleontology ,ONTOGENY ,Anatomy ,biology.organism_classification ,LATE CRETACEOUS ,Plesiosauria ,Skull ,Elasmosauridae ,medicine.anatomical_structure ,AUSTRAL ELASMOSAURIDS ,CIENCIAS NATURALES Y EXACTAS - Abstract
This paper presents the detailed description of a remarkable skull and partial postcranial skeleton of a very juvenile elasmosaurid referred to Tuarangisaurus keyesi (CD 427), from the upper Campanian-lower Maastrichtian levels of the Tahora Formation, New Zealand. The following points are discussed: i) the conspecific status of CD 427 with T. keyesi, ii) clarification of several cranial sutures in the adult holotype of T. keyesi by comparison with the clearly open sutures in the juvenile specimen; iii) morphologic changes undergone by the skull during the ontogeny of T. keyesi; iv) a first look at the postcranial skeleton of T. keyesi. The studied specimen holds a great significance because it represents one of the rarely-available juvenile elasmosaurid skulls known worldwide. As a result, we provide the first insights regarding the skull ontogeny of an austral elasmosaurid plesiosaurian. Fil: Otero, Rodrigo A.. Universidad de Chile; Chile Fil: O'gorman, Jose Patricio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Moisley, William L.. No especifíca; Fil: Terezow, Marianna. Institute of Geological and Nuclear Sciencies; Nueva Zelanda Fil: McKee, Joseph A. W.. Terrace End Post Centre Plus; Nueva Zelanda
- Published
- 2018