Browsing by Autor "Alfredo E. Zurita"

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A new species of glyptodontine (Mammalia, Xenarthra, Glyptodontidae) from the Quaternary of the Eastern Cordillera, Bolivia: phylogeny and palaeobiogeography
(Taylor & Francis, 2020) Francisco Cuadrelli; Alfredo E. Zurita; Pablo Toriño; Ángel R. Miño‐Boilini; Daniel Perea; Carlos A. Luna; David D. Gillette; Omar Medina
Francisco Cuadrellia*, Alfredo E. Zuritaa, Pablo Toriñob, Ángel R. Miño-Boilinia, Daniel Pereab, Carlos A. Lunaa, David D. Gillettec & Omar Medinada Centro de Ecología Aplicada del Litoral (CONICET-UNNE), Ruta 5, km 2,5CC 128 (3400), Corrientes, Argentina; b Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay; c Museum of Northern Arizona, 3101, Fort Valley Road, 86001 Flagstaff, AZ, USA; d Facultad de Arquitectura y Ciencias del Hábitat, Universidad Mayor, Real y Pontificia de San Francisco Xavier de Chuquisaca. Calle Destacamento 317 ex REFISUR, Sucre, Bolivia
A peculiar specimen of Panochthus (Xenarthra, Glyptodontidae) from the Eastern Cordillera, Bolivia
(National Geology and Mining Service, 2023) Francisco Cuadrelli; Martín Zamorano; Daniel Barasoain; Federico Anaya; Alfredo E. Zurita
Panochthus Burmeister is one of the most diversified and widely distributed glyptodonts in the Pleistocene of South America, which includes areas located at high altitudes (>4,000 m a.s.l.). Within the genus, eight species (P. intermedius Lydekker, P. subintermedius Castellanos, P. tuberculatus (Owen), P. frenzelianus Ameghino, P. greslebini Castellanos, P. jaguaribensis Moreira, P. hipsilis Zurita, Zamorano, Scillato-Yané, Fidel, Iriondo and Gillette, and P. florensis Brambilla, López and Parent) are currently recognized. Here, we report a dorsal carapace (UATF-V n/n) from the Pleistocene of the surroundings of Potosí, Bolivia, that shows some morphological particularities when compared to the carapace of P. intermedius, P. frenzelianus, P. subintermedius and P. tuberculatus, including: a) its maximum dorso-ventral diameter is at the anterior half, meanwhile in other species is at mid-point (e.g., Propalaehoplophorus) or at posterior half (e.g., Glyptodon); b) the dorsal profile is different in comparison to other glyptodonts (e.g., Glyptodon, Glyptotherium, Neosclerocalyptus, Propalaehoplophorus); c) the ornamentation pattern of the osteoderms shows a central figure surrounded by small polygonal figures along the most exposed surface of the carapace (except for the mid-dorsal region that shows reticular ornamentation pattern), being different from that of the remaining species: of Panochthus, in which central figures are limited to the caudal/cephalic and most lateral regions of the carapace. In summary, the combination of characters suggests that it could belong to a new species or, alternatively, to P. floriensis or P. jaguaribensis in which the dorsal carapace is not yet known. The phylogenetic analysis confirms its basal position among Panochthus and highlights the importance of these high elevation areas of the Andes in South America in order to understand the complex evolutionary history of glyptodonts.
An exceptional Pleistocene specimen of Panochthus Burmeister (Xenarthra, Glyptodontoidea) from Bolivia: Its contribution to the understanding of the Early-Middle Pleistocene Panochthini
(Elsevier BV, 2011) Alfredo E. Zurita; Martín Zamorano; Gustavo Juan Scillato-Yané; Laureano R. González Ruiz; Santiago Rodríguez-Bualó; Boris Rivas Durán; Ricardo Céspedes Paz
Knowledge of the Early-Middle Pleistocene (Ensenadan Age/Stage ; ca. 1.8–0.4 Ma) South American Glyptodontidae (Cingulata) is still poor compared with the Late Pleistocene-Early Holocene taxa (Lujanian Age/Stage). This is especially true for the Glyptodontidae Panochthini, in which it is possible to recognize two Ensenadan species from the Pampean region of Argentina, Panochthus intermedius and P. subintermedius, known only by their type material. Prior to this contribution, the knowledge of P. intermedius, a taxon with biostratigraphic importance for being considered as a guide taxon of the Ensenadan Age/Stage of South America, was limited to a dorsal carapace. The finding of an exceptional almost complete specimen from the Early-Middle Pleistocene of Bolivia has allowed us to greatly improve the morphological characterization of this species, and discuss some taxonomic aspects related to the other Ensenadan Panochthini. This specimen represents the most completely known Panochthini and one of the most complete Glyptodontidae from the Early-Middle Pleistocene of South America. La connaissance de Glyptodontidae (Cingulata) de l’étage/âge Ensenadéen (1,8–0,4 Ma) d’Amérique du Sud est encore pauvre, en comparaison des taxons de la période fini – Pléistocène – début de l’Holocène (étage/âge Lujanéen). Cela est particulièrement vrai pour les Glyptodontidae Panochtini, chez lesquels il est possible de reconnaître deux espèces de l’Ensenadéen provenant de la Pampa argentine, Panochthus intermedius et P. subintermedius connues, seulement par leur matériel type. Avant le travail ici présenté, la connaissance de P. intermedius, taxon d’importance biostratigraphique suffisante pour être considéré comme un taxon guide de l’étage/âge Ensenadéen d’Amérique du Sud, était limité à une carapace dorsale. La découverte d’un spécimen exceptionnel, presque complet du Pléistocène inférieur-moyen de Bolivie nous a permis d’améliorer grandement la caractérisation morphologique de cette espèce et de discuter de certains aspects taxonomiques en relation avec d’autres Panochthini ensenadéens. Ce spécimen représente le Panochthini le plus complet connu et l’un des Glyptodontidae le plus complet du Pléistocène inférieur-moyen d’Amérique du Sud.
First record and description of an exceptional unborn specimen of Cingulata Glyptodontidae: Glyptodon Owen (Xenarthra)
(Elsevier BV, 2009) Alfredo E. Zurita; Ángel R. Miño‐Boilini; Esteban Soibelzon; Gustavo Juan Scillato-Yané; Germán Mariano Gasparini; Freddy Paredes-Ríos
In this article, we report the first finding and description of an unborn specimen of Cingulata Glyptodontidae. This specimen was found inside a well-preserved dorsal carapace assignable to Glyptodon cf. G. elongatus, partially articulated and located in the pelvic portion. It was exhumed from the Pleistocene sediments of Monte Cercado city, Tarija Valley (Bolivia), and it consists of, mainly, a partial skull, a mandible with some molariforms (m4-m8), the distal half of both scapulae, the diaphysis of both femora and other undetermined remains. From an anatomical viewpoint, the presence in this specimen of some characters, especially in the skull, that are very similar to those present in fully developed individuals (i.e. subtriangular outline of the narial aperture) is remarkable; however, the ascending ramus of the mandible describes an angle close to 90° with respect to the horizontal ramus. The only previous mention of an unborn Glyptodontidae comes also from Tarija Valley, but that material is lost. Dans cet article, nous rapportons les premières découvertes et descriptions d’un specimen non-né de Cingulata Glyptodontidae. Ce spécimen a été trouvé dans une carapace dorsale bien préservée attribuable à Glyptodon cf. G. elongatus, partiellement articulé et localisé dans la région pelvienne. Il a été exhumé de sédiments pléistocènes de la ville de Monte Cercado, Vallée de Tarija (Bolivie) et consiste principalement en un crâne partiel, une mandibule avec quelques molariformes (m4-m8), la moitié distale des deux scapulas, la dyaphyse des deux fémurs et d’autres restes indéterminés. D’un point de vue anatomique, la présence, dans ce spécimen, et particulièrement dans le crâne, de caractères très semblables à ceux que l’on observe dans des individus complètement développés (i.e. le contour subtriangulaire de l’ouverture nariale) est remarquable ; cependant, la branche ascendante de la mandibule décrit un angle proche de 90̊ par rapport à la branche horizontale. L’unique autre mention d’un Glyptodontidae non-né provient également de la vallée de Tarija, mais ce matériel a été perdu.
New localities with Pleistocene mammals from the Department of Chuquisaca (Bolivia)
(Elsevier BV, 2025) Alfredo E. Zurita; Carlos A. Luna; Francisco Cuadrelli; Daniel Barasoain; Raúl O. Gómez; Omar Medina; Ángel R. Miño‐Boilini
Preliminar correlation of the Pleistocene sequences of the Tarija valley (Bolivia) with the Pampean chronological standard
(Elsevier BV, 2009) Eduardo P. Tonni; Esteban Soibelzon; Alberto Luis Cione; Alfredo A. Carlini; Gustavo Juan Scillato Yané; Alfredo E. Zurita; Freddy Paredes Ríos