7.1.22

Variabilidad intraespecífica en los titanosaurios de Lo Hueco en el 65th Annual Meeting of the Palaeontological Association


En los últimos días de 2021, algunos investigadores del Grupo de Biología Evolutiva de la UNED estuvimos en la sexagésimo quinto encuentro anual de la Palaeontological Association (PALASS 2021), un encuentro internacional online que ha tenido lugar en Manchester (Reino Unido). En esta edición de la PALASS, presentamos una comunicación en formato poster titulada "Intraspecific variation on tail morphology in a new titanosaur (Dinosauria, Sauropoda) from Lo Hueco (Late Cretaceous, Spain)". Esta comunicación esta centrada en el análisis de la posible variabilidad intraespecífica presente en las series de vertebras caudales de un nuevo conjunto de ejemplares referibles a una única forma de titanosaurio procedente de los sedimentos campano-maastrichtienses del yacimiento de Lo Hueco (Formación Villlalba de la Sierra) en Cuenca (Castilla-La Mancha, España). 

Lo Hueco is a multi-taxa bonebed from the upper Campanian–lower Maastrichtian of Spain, which includes several partial titanosaurian skeletons, mostly articulated or with low dispersion. This remarkable sample is key to understanding the phylogeny of IberoArmorican titanosaurs. Lohuecotitan pandafilandi was the first established taxon at the Lo Hueco site; however, the presence of two to three additional lithostrotian forms is being considered. The intraspecific variation in the taxa represented by more than one individual is being analysed through the detailed description of several morphological characters. HUE-EC-02 and HUE-EC-03 seem to belong to the same taxon, and the comparison of their tail morphology identifies variable features: morphology of the condyle; prezygapophyseal processes; orientation of the anterior articular face; and development of the vertebral laminae and fossae (e.g. prsl, pocdf). The orientation of the neural spine and prezygapophyseal processes, the anteroposterior length of the posterior condyle and the morphology of the ventral hollow is less variable. Higher degree of variability is observed in the anterior section of the tail. The suture between the neural arch and centrum is still visible in HUE-EC-02, suggesting that the present variation could be related to ontogeny.

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Más información:
  • Mocho, P., Páramo, A., Escaso, F., Marcos-Fernández, F., Vidal, D., Ortega, F. 2021. Intraspecific variation on tail morphology in a new titanosaur (Dinosauria, Sauropoda) from Lo Hueco (Late Cretaceous, Spain), pp. 81. In: The Palaeontological Association (ed.), 65th Annual Meeting, 18th–20th December 2021, Hosted online by The University of Manchester, Programme Abstracts AGM papers.

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