Comparative dental arrangements in elasmosaurid plesiosaurians.

<p>Crania and mandibles of (A) <i>Libonectes atlasense</i>, Staatliches Museum für Naturkunde Karlsruhe (SMNK) PAL 3978, Germany; (B) <i>Thalassomedon hanningtoni</i>, University of Nebraska State Museum (UNSM) 50132, U.S.A.; (C) <i>Styxosaurus snowii</i>, Kansas University Museum of Natural History (KUVP) 1301, U.S.A.; (D) <i>Libonectes morgani</i>, Southern Methodist University Schuler Museum of Paleontology (SMUSMP) 691, U.S.A., in palatal view with (E) enlargement of the premaxillary rostrum; (F) <i>Aristonectes parvidens</i>, Museo La Plata (MLP) 40-XI-14-6, Argentina in lateral view with (G) enlargement of the maxillary and dentary alveoli. Scales = 50 mm in (A, C, D); 20 mm in (E, G); 100 mm in (B, F). Abbreviations: dta, dentary alveoli; dlf, dental lamina foramina; pma, premaxillary alveoli; mxa, maxillary alveoli; mxf, enlarged maxillary ‘fangs’.