The appendicular skeleton of Rinconsaurus caudamirus (Sauropoda: Titanosauria) from the Upper Cretaceous of Patagonia, Argentina

MORENO, A.G.U.S.T.Í.N.P.É.R.E.Z.; Otero, Alejandro; CARBALLIDO, J.O.S.É.L.; Salgado, Leonardo; Calvo, Jorge O.

doi:10.1016/j.cretres.2022.105389

Cited by 7 publications

(10 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…MCF-PVPH 916 and MCF-PVPH 917 presented here come from the Sierra del Portezuelo, and are composed of caudal vertebrae without clear articular association from at least two different specimens. In other independent phylogenetic analyses [32,36,67], materials from the Portezuelo Formation (e.g., Malarguesaurus and material from the Los Bastos locality), have been shown to be phylogenetically unstable due to the incompleteness of the specimens. The phylogenetic analysis presented here shows that the new materials from Sierra del Portezuelo (MCF-PVPH 916 and MCF-PVPH 917) are related to Malarguesaurus within a monophyletic clade sister to Somphospondily.…”

Section: Discussionmentioning

confidence: 99%

“…5). However, recent analyzes show that the position of Malarguesaurus is unstable (e.g., [32,67,70]). Similar to MCF-PVPH 917, the anterior caudal vertebra of Malarguesaurus have the following features (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Also this clade lacks a reliable character combination that distinguishes this group from other titanosauriform groups, since the synapomorphic characters of this could be attributed to serial anatomical variations within the caudal vertebral series. This lack of support is attributed to the presence of highly unstable taxa, such as Malarguesaurus, which are recovered in different positions in other studies [3,32,67]. This instability is mainly due to the paucity of anatomical information of the taxa that make up this clade.…”

Section: Phylogenetic Analysismentioning

confidence: 93%

“…In order to investigate the phylogenetic relationships of MCF-PVPH 916 and 917, an equally weighted parsimony analysis was carried out. We added the new material to the [32] dataset which was then analyzed in TNT v1.5 [33]. We conducted the analysis with the "New Technology Search", using the command "xmult = hits50".…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Unraveling sauropod diversity in the Portezuelo Formation of Patagonia through a comprehensive analysis of new and existing material

Gomez,

Pérez-Moreno,

Meso

et al. 2024

Preprint

View full text Add to dashboard Cite

The Portezuelo Formation preserves an outstanding record of the upper Turonian - lower Coniacian of Gondwana. Despite the discovery of a significant amount of sauropod fossil material from the Formation, only two species have been formally described to date: Malarguesaurus florenciae and Futalognkosaurus dukei. Here we present new sauropod material mostly composed of non-articulated caudal vertebrae that belong to at least two different titanosauriforms on the basis of following features: anterior caudal vertebrae with procoelous-opistoplatyan articulations, transverse processes that reach the posterior articular face of the centrum and neural spines with a lateromedial width of ~ 50% of its anteroposterior length; anterior and middle caudal vertebra with the neural arch restricted to the anterior half of the centrum; middle caudal centrum with circular cross-section. Phylogenetic analysis recovers the new material in close relation to Malarguesaurus within a monophyletic clade sister to Somphospondily. This clade shares large pedicel height with a vertical anterior border on the middle caudal vertebrae, a vertical orientation of the neural spines on the distalmost middle caudal vertebrae and proximalmost posterior caudal vertebrae, and subequal relative lengths of the proximal ulnar condylar processes. The specimens presented here are distinct not only from Malarguesaurus and Futalognkosaurus, but also from other indeterminate titanosaur remains from the same formation. Whilst we err on the side of caution in not naming new taxa here, the two specimens significantly expand what we know about sauropods in the Turonian-Coniacian ecosystems of Patagonia, which will continue to do so as more material is discovered.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Phylogenetic Analysismentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Unraveling sauropod diversity in the Portezuelo Formation of Patagonia through a comprehensive analysis of new and existing material

Gomez,

Pérez-Moreno,

Meso

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…In order to investigate the phylogenetic relationships of MCF-PVPH 916 and 917, an equally weighted parsimony analysis was carried out. We added the new material to the [ 37 ] dataset which was then analyzed in TNT v1.5 [ 38 ]. We conducted the analysis with the “New Technology Search”, using the command “xmult = hits50”.…”

Section: Methodsmentioning

confidence: 99%

Unraveling sauropod diversity in the Portezuelo Formation of Patagonia through a comprehensive analysis of new and existing material

Gomez,

Pérez-Moreno,

Meso

et al. 2024

BMC Ecol Evo

View full text Add to dashboard Cite

The Portezuelo Formation preserves an outstanding record of the upper Turonian – lower Coniacian. Despite the discovery of a significant quantity of sauropod fossil material from the formation, only two species have been formally described to date: Malarguesaurus florenciae and Futalognkosaurus dukei. Here we present new sauropod material mostly composed of non-articulated caudal vertebrae (MCF-PVPH 916 and 917) that belong to two titanosauriforms on the basis of the following features: anterior caudal vertebrae with procoelous-opisthoplatyan articulations, transverse processes that reach the posterior articular face of the centrum and neural spines with a transverse width of around 50% of their anteroposterior length; anterior and middle caudal vertebrae with the neural arch restricted to the anterior half of the centrum; middle caudal centra with circular cross-section. Phylogenetic analysis recovers the new material in close relation to Malarguesaurus within a monophyletic clade at the base of Somphospondyli. This clade shares large pedicel height with a vertical anterior border on the middle caudal vertebrae, a vertical orientation of the neural spines on the distalmost middle caudal vertebrae and proximalmost posterior caudal vertebrae, and subequal relative lengths of the proximal ulnar condylar processes. The specimens presented here are distinct not only from Futalognkosaurus, but also from other indeterminate titanosaurian remains from the same formation. However, there are no significant differences between the specimen MCF-PVPH 917 and Malarguesaurus, but there are differences between the posterior caudal vertebrae of MCF-PVPH 916 and Malarguesaurus, so they could be considered different species. Whilst we err on the side of caution in not naming new taxa here, the two specimens significantly expand what we know about sauropods in the Turonian–Coniacian ecosystems of Patagonia, which will continue to do so as more material is discovered.

show abstract

Paleobiology of Rinconsaurus caudamirus and Muyelensaurus pecheni (Sauropoda, Titanosauria) from the Neuquén Group, Upper Cretaceous of Argentina: inferences from long bone histology

González,

Cerda,

Moreno

et al. 2024

Cretaceous Research

View full text Add to dashboard Cite

The appendicular skeleton of Rinconsaurus caudamirus (Sauropoda: Titanosauria) from the Upper Cretaceous of Patagonia, Argentina

Cited by 7 publications

References 99 publications

Unraveling sauropod diversity in the Portezuelo Formation of Patagonia through a comprehensive analysis of new and existing material

Unraveling sauropod diversity in the Portezuelo Formation of Patagonia through a comprehensive analysis of new and existing material

Unraveling sauropod diversity in the Portezuelo Formation of Patagonia through a comprehensive analysis of new and existing material

Paleobiology of Rinconsaurus caudamirus and Muyelensaurus pecheni (Sauropoda, Titanosauria) from the Neuquén Group, Upper Cretaceous of Argentina: inferences from long bone histology

Contact Info

Product

Resources

About