ARTICLES AMEGHINIANA - 2016 - Volume 53 (1): 14 – 25 ISSN 0002-7014 A NEW PEIROSAURID (CROCODYLIFORMES, MESOEUCROCODYLIA) FROM THE UPPER CRETACEOUS OF PATAGONIA, ARGENTINA FRANCISCO BARRIOS 1, ARIANA PAULINA-CARABAJAL 1,2 AND PAULA BONA 2,3 1Museo Municipal Carmen Funes, Av. Córdoba 55, Q8318EBA Plaza Huincul, Neuquén, Argentina.
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[email protected] 2CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Rivadavia 1917, C1033AAJ Ciudad Autónoma de Buenos Aires, Argentina. 3División Paleontología Vertebrados, Museo de La Plata, Universidad Nacional de La Plata. Paseo del Bosque s/n, B1900FWA La Plata, Argentina.
[email protected] Abstract . Peirosaurids are a group of Cretaceous continental crocodyliforms from Gondwana. Two species are known from the Neuquén Group in Argentina: Lomasuchus palpebrosus (Portezuelo Formation, late Turonian–early Coniacian) and Gasparinisuchus peirosauroides (Bajo de la Carpa and Anacleto formations, Santonian and early Campanian, respectively). Here, we describe the first peirosaurid from the Cerro Lisandro Formation, Bayomesasuchus hernandezi gen. et sp. nov. The material corresponds to a fragmentary skull and mandible. Although frag - mentary, this is the most complete crocodyliform specimen recorded for the Cerro Lisandro Formation. In a phylogenetic analysis Bayome - sasuchus is depicted in a polytomy together with South American peirosaurids and the African form Hamadasuchus rebouli . Key words. Bayomesasuchus . Peirosauridae. Cerro Lisandro Formation. Cretaceous . Resumen. UN NUEVO PEIROSÁURIDO (CROCODYLIFORMES, MESOEUCROCODYLIA) DEL CRETÁCICO SUPERIOR DE PATAGONIA, ARGEN - TINA. Los peirosáuridos constituyen un grupo de crocodiliformes continentales del Cretácico de Gondwana. Para el Grupo Neuquén, Argentina, se conocen dos especies: Lomasuchus palpebrosus (Formación Portezuelo, Turoniano tardío–Coniaciano temprano) y Gasparinisuchus peiro - sau roides (Formaciones Bajo de la Carpa y Anacleto, Santoniano y Campaniano temprano, respectivamente).