Gasparini, Z. Bardet, N. Martin, J. E. Fernandez, M. 2003 The elasmosaurid plesiosaur <em>Aristonectes</em> Cabrera from the latest Cretaceous of South America and Antarctica Journal of Vertebrate Paleontology 23 104-115 P_dolichodeirus Tricleidus Cryptoclidus Occitanosaurus Microcleidus Muraenosaurus Callawayasaurus Libonectes Hydrotherosaurus Aristonectes Osteology Maximum Parsimony Based on reanalysis of the original matrix. Gasparini_etal_2003a