Reassessment of Prejanopterus curvirostris, a Basal Pterodactyloid Pterosaur from the Early Cretaceous of Spain  

作　　者：Xabier PEREDA-SUBERBIOLA Fabien KNOLL José Ignacio RUIZ-OMEACA Julio COMPANY Fidel TORCIDA FERNNDEZ-BALDOR 

机构地区：[1]Universidad del País Vasco/Euskal Herriko Unibertsitatea,Facultad de Cienciay Tecnología,Dpto.Estratigrafíay Paleontología [2]Departamento de Paleobiología,Museo Nacional de Ciencias Naturales-CSIC [3]Museo del Jurásico de Asturias (MUJA) [4]Departamento de Geología,Universidad de Oviedo [5]Departamento de Ingeniería del Terreno,Universidad Politécnica de Valencia [6]Colectivo Arqueológico-Paleontológico de Salas (C.A.S.),Museo de Dinosaurios

出　　处：《Acta Geologica Sinica(English Edition)》2012年第6期1389-1401,共13页地质学报（英文版）

基　　金：provided by the projects CGL2010-16447/BTE,CGL2010-18851/BTE,CGL2009-12143/BTE of the Ministerio de Ciencia e Innovación (currently Ministerio de Economía y Comptetitividad,MINECO) of Spain;by the research group IT-320-10 of the Gobierno Vasco/EJ (XPS);by the Alexander von Humboldt Foundation through a sponsorship of renewed research stay in Germany (FK);by the protocol CN-04-226 of the Principado de Asturias/Universidad de Oviedo (JIR-O)

摘　　要：Prejanopterus curvirostra, from the Early Cretaceous of La Rioja province, was the first pterosaur genus and species described from Spain. The material comprises disarticulated cranial and postcranial remains from several individuals. The fossil-bearing bed is assigned to the lacustrine Leza Formation （eastern Cameros Basin, NW margin of the Iberian Range）. This unit is regarded as either Berriasian-Valanginian or Barremian-Aptian. Prejanopterus curvirostris （specific name emended） was originally diagnosed on the basis of several characters of which the most significant was a lateral curvature of the rostrum. Re-examination of the holotype （rostrum） and paratype （partial rostrum with teeth） indicates that there is no genuine sideways bend of the preserved premaxilla-maxilla segments, but a slight dorsal curvature. Prejanopterus is characterized by a unique combination of characters： an emended diagnosis is provided. In contrast with previous estimates, the wing span of Prejanopterus was probably not much （if ever） in excess of 2 m. A phylogenetic analysis suggests that Prejanopterus is a basal pterodactyloid positioned between Pterodactylus and Cycnorhamphus- Gallodactylus. Prejanopterus represents the first evidence of Pterodactylidae in the Early Cretaceous of the Iberian Peninsula.Prejanopterus curvirostra, from the Early Cretaceous of La Rioja province, was the first pterosaur genus and species described from Spain. The material comprises disarticulated cranial and postcranial remains from several individuals. The fossil-bearing bed is assigned to the lacustrine Leza Formation （eastern Cameros Basin, NW margin of the Iberian Range）. This unit is regarded as either Berriasian-Valanginian or Barremian-Aptian. Prejanopterus curvirostris （specific name emended） was originally diagnosed on the basis of several characters of which the most significant was a lateral curvature of the rostrum. Re-examination of the holotype （rostrum） and paratype （partial rostrum with teeth） indicates that there is no genuine sideways bend of the preserved premaxilla-maxilla segments, but a slight dorsal curvature. Prejanopterus is characterized by a unique combination of characters： an emended diagnosis is provided. In contrast with previous estimates, the wing span of Prejanopterus was probably not much （if ever） in excess of 2 m. A phylogenetic analysis suggests that Prejanopterus is a basal pterodactyloid positioned between Pterodactylus and Cycnorhamphus- Gallodactylus. Prejanopterus represents the first evidence of Pterodactylidae in the Early Cretaceous of the Iberian Peninsula.

关 键 词：PTEROSAURIA Prejanopterus Leza Formation Early Cretaceous La Rioja Spain 

分 类 号：Q915[天文地球—古生物学与地层学]