Nuevos datos sobre la anatomía de Paludidraco multidentatus en el XXII Annual Meeting de la EAVP

Miembros del Grupo de Biología Evolutiva de la UNED han presentado durante la 22a edición de la EAVP la comunicación titulada “New anatomical information about the Spanish Upper Triassic simosaurid Paludidraco multidentatus (Sauropterygia) based on an unpublished relatively complete postcranial skeleton”. En esta comunicación se ha presentado un nuevo ejemplar relativamente completo y parcialmente articulado del enigmático taxón sauropterigio español P. multidentatus. En este trabajo, se hace una presentación y comparación anatómica preliminar de los elementos preservados en este nuevo ejemplar con aquéllos presentes y ya descritos en detalle del holotipo de dicho taxón. Así, se hace hincapié en los elementos que aportarán información novedosa sobre la anatomía de este reptil marino hasta ahora únicamente descrito en base al ejemplar de referencia (holotipo). A continuación, os dejamos el resumen perteneciente a este trabajo:

Paludidraco multidentatus (Simosauridae, Sauropterygia) was defined based on a relatively complete and articulated skeleton (the holotype), including cranial and postcranial elements, and on a second skull (the paratype), from the Julian (early Carnian, Late Triassic) of El Atance fossil site (Guadalajara, central Spain). No additional individual attributable to this taxon has subsequently described. Despite the relatively good preservation of the holotype, the lack of some elements in this specimen (i.e., the middle-to-distal caudal region, zeugopodial and autopodial elements), or the partial preservation of others (i.e., coracoids, ilia, pubes, gastralia, or the proximal caudal region) have not allowed to know the complete anatomy of its postcranial skeleton. In this context, an unpublished specimen attributable to P. multidentatus, from its type locality, is presented here. The new specimen consists in a relatively complete and partially articulated postcranial skeleton, that is more robust and about 20% larger than the holotype. It preserves elements corresponding to the cervical, dorsal, sacral and proximal caudal regions; both pectoral and pelvic girdles; forelimb and hindlimb remains (including zeugopodial bones); and a well-preserved set of articulated gastral elements. As in the holotype, the new individual preserves most of its articulated dorsal region, lacking most cervical and caudal bones, although the caudal region is identified as more complete than that in the holotype. In this work, we provide a preliminary anatomical description of the skeletal elements of the new individual of P. multidentatus, with special emphasis on those that provide anatomical characters hitherto not documented for this taxon (i.e., zeugopodial elements), and on those previously poorly known (i.e., proximal regions of both pectoral and pelvic girdle elements, caudal vertebrae and ribs, gastralia, ilia), as well as on those recognized as intraspecifically variable when it is compared with the holotype.

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Más información:

• Referencia: Cabezuelo-Hernández, A., de Miguel Chaves, C., Ortega, F., Pérez-García, A. 2025. New anatomical information about the Spanish Upper Triassic simosaurid Paludidraco multidentatus (Sauropterygia) based on an unpublished relatively complete postcranial skeleton. Book of Abstracts of the XXII Annual Meeting of the European Association of Vertebrate Palaeontologists, 30 June–5 July 2025, Kraków, Poland. Palaeovertebrata, 71.