Geobulletin alpha

Source info:

Author:	Godzillin
Date:	2025-03-28 10:16:00
Blog:	Dinosaurios (el cuaderno de Godzillín)
URL:	http://godzillin.blogspot.com/2025/03/el-esqueleto-apendicular-de-neochelys.html

Summary:

Durante la quinta edición del Palaeontological Virtual Congress que ha tenido lugar durante este mes de marzo, se presentó la comunicación titulada: "The appendicular skeleton of Neochelys (Pleurodira; Podocnemididae): insights from the spanish species Neochelys zamorensis", por parte de María Gutíerrez-Gálvez, Francisco Ortega, Santiago Martín de Jesús y Adán Pérez García. En este trabajo se ha analizado el esqueleto apendicular del género de tortugas pleurodiras Neochelys, que pertenece a la familia Podocnemididae. Pese a tener reconocidas ocho especies dentro de este género, sólo la especie Neochelys franzeni tiene publicado parte de su esqueleto apendicular. Se ha comparado el esqueleto apendicular de esta tortuga con el esqueleto apendicular de las tortugas ibéricas Neochelys salmanticensis y Neochelys zamorensis, con especial énfasis en esta última dado que el esqueleto apendicular de Neochelys salmanticensis ha sido presentado anteriormente en otros congresos. Con todo ello, se ha realizado una caracterización preliminar del esqueleto apendicular de Neochelys zamorensis y se ha reconocido la variabilidad interespecífica que se observa dentro del género Neochelys. El resumen de la comunicación es el siguiente: Neochelys is a genus of turtles belonging to Podocnemididae (Pleurodira). Currently, Podocnemididae is exclusively represented in South America and Madagascar. However, it was relatively abundant in freshwater ecosystems of the Eocene of Europe, with Neochelys being the most diverse genus. Despite Neochelys comprising almost ten species, its appendicular skeleton is poorly known, with almost no appendicular elements having been documented. Thus, the only species for which some appendicular remains have been partially figured and described is the German Lutetian Neochelys franzeni. Two representatives of Neochelys are known in the Spanish Duero Basin. The younger is the Bartonian Neochelys salmanticensis, being the larger representative described for the genus. The other is the Lutetian Neochelys zamorensis. Although both forms were poorly known until recently, their shells have been characterized with great precision in recent studies. The most abundant is Neochelys zamorensis represented by hundreds of specimens. In addition to numerous partial shells and isolated plates, other anatomical elements are well represented. Among them, the hitherto unpublished appendicular remains stand out. Articulated and isolated bones are recognized (including both girdles, humeri, femora, and elements of both the zeugopodium and the autopodium), corresponding to individuals at different ontogenetic stages. The detailed study of these bones is presented here, along with the comparison to the appendicular elements of other members of Pleurodira and to those of other podocnemidids. Not only the appendicular skeleton of Neochelys can be characterized relative to those of other pleurodires, but interspecific variability can also be recognized for this anatomical region. ----- Más información: Referencia: Gutiérrez-Gálvez, M., Ortega, F., Martín de Jesús, S., Pérez-García, A. 2025. The apendicular skeleton of Neochelys (Pleurodira; Podocnemididae): insights from the Spanish species Neochelys zamorensis. In Vlachos et al. (Eds.), Book of Abstracts of the 5th Palaeontological Virtual Congress, 349.

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Keywords:

Cenozoico