期刊
CRETACEOUS RESEARCH
卷 30, 期 1, 页码 135-148出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cretres.2008.06.006
关键词
Sauropoda; Mendoza; Argentina; Neuquen basin; Upper Cretaceous
资金
- Instituto Argentino de Nivologia, Glaciologia y Ciencias Ambientales (IANIGLA)
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANCYT) [PICT 2005-33984]
- Universidad Nacional de Cuyo [2007-2009]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) [PIP 5222]
Malarguesaurus florenciae gen. et sp. nov. is a new and robust somphospondylian titanosauriform (Dinosauria, Sauropoda) from the Neuquen basin, Mendoza Province, Argentina. The specimen comes from Upper Cretaceous strata assigned to the Portezuelo Formation (upper Turonian-lower Coniacian). It includes proximal, middle and distal caudal vertebrae, chevrons, dorsal ribs, and appendicular bones. Malarguesaurus is characterized by the following association of characters: (1) proximal caudal neural spines vertically directed, with a concave caudal border, and a caudodorsal corner forming a right angle; (2) procoelous-opisthoplatyan proximal and middle caudal vertebrae associated with procoelous distal caudal centra; and (3) distal caudal neural spines having a concave and depressed dorsal border. A preliminar cladistic analysis placed (Ligabuesaurus + (Malarguesaurus + Phuwiangosaurus)) as a sister taxon of Titanosauria. Unique among the titanosauriforms, Malarguesaurus has procoelous distal caudal centra associated with procoelous-opisthoplatyan proximal caudals. This discovery is a new evidence of the morphologic diversity of the South American sauropods. (C) 2008 Elsevier Ltd. All rights reserved.
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