Durante el pasado XXIV EJIP celebrado en Bogarra (Albacete), se presentó el trabajo titulado "Morphological disparity of the pectoral girdle in Podocnemididae (Testudines, Pleurodira)", por María Gutiérrez Gálvez y Adan Pérez García. En este trabajo se ha analizado la cintura pectoral (escápula y coracoides) de numerosos representantes de Podocnemididae, incluyendo taxones extintos y taxones pertenecientes a la biodiversidad actual. La muestra se ha obtenido de la bibliografía, además de ejemplares que se encuentran actualmente bajo estudio. Se observa una mayor disparidad en la morfología de estos elementos del esqueleto apendicular en aquellos representantes extintos frente a los actuales. Esto puede deberse a una mayor diversidad de hábitats y tamaños en la biodiversidad extinta. El resumen de la comunicación es el siguiente:
The podocnemidids turtles are relatively diverse, forming part of current biodiversity, but being well-represented in the fossil record since the Late Cretaceous. Although they are currently restricted to South America and Africa, this lineage had a larger distribution area during warm periods in the past, inhabiting Europe at the Eocene. The shell and/or the skull of the extant and extinct representatives have been well documented, but information on the postcranial skeleton is very limited or completely unknown.. In this sense, lack of knowledge about the appendicular skeleton is very common for many turtle lineages, especially for those of Pleurodira. Scarce appendicular elements have been figured for a few extinct and extant podocnemidid species, most of them being poorly characterized. Nevertheless, knowledge about the appendicular skeleton is fundamental to understanding the different ecological adaptations and lifestyles of each species. This work is focused on the study of the morphologies of pectoral girdles of several representatives of this lineage, including the scapula and the coracoid, in order to understand the different adaptations of each species to its habitat. We consider extinct species, both all those for which some detail about this anatomical region has been previously published and others Mesozoic and Palaeozoic for which it remained unpublished, but also one species of each of the three genera that are part of the current biodiversity. The extant podocnemidids shows a low disparity in its appendicular skeleton relative to the extinct species here considered. This is justified both by considering the adaptations to a greater diversity of aquatic environments in the past —including forms somewhat less linked to the aquatic environment than the extant ones, but also others that inhabited transitional and even marine environments—, and by the modifications for the remarkable increase in size experienced by several extinct representatives.
Más información:
- Referencia: Gutiérrez-Gálvez, M., Pérez-García, A. (2026) Morphological disparity of the pectoral girdle in Podocnemididae (Testudines, Pleurodira). Libro de resúmenes del XXIV Encuentro de Jóvenes Investigadores en Paleontología (EJIP), Bogarra, Albacete.
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