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May 2013 - present
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Publications (45)
A new titanosaur sauropod genus including an almost complete skull and axial elements to the hips, reflecting a convergent bauplan with the older rebbachisaurids sauropods.
Resumen: PRIMER REGISTRO DEL NIDO DE ABEJA FÓSIL ELIPSOIDEICHNUS ME-YERI DE ARGENTINA (COLÓN, PROVINCIA DE ENTRE RÍOS). Se presenta el primer registro de la traza fósil Elipsoideichnus meyeri Roselli, 1987, de afloramientos de la cantera Prefectura Naval Argentina, Parque Nacional El Palmar, Colón (provincia de Entre Ríos), Argentina. E. meyeri con...
Since the arrival of clinical imaging in paleontology, paleoneurology became a flourishing scope for investigations, especially in dinosaurs. Sauropods have been one of the most studied groups, and Dicraeosauridae was not an exception. Cranial remains and/or endocasts are preserved for several Jurassic and Cretaceous dicraeosaurids (Amargasaurus, D...
Giant carnivorous dinosaurs such as Tyrannosaurus rex and abelisaurids are characterized by highly reduced forelimbs that stand in contrast to their huge dimensions, massive skulls, and obligate bipedalism.¹,² Another group that follows this pattern, yet is still poorly known, is the Carcharodontosauridae: dominant predators that inhabited most con...
Flagellicaudatan diplodocoids include the two families Dicraeosauridae and Diplodocidae. Although different in sizes and relative proportions (e.g. neural arches height, neck length, tail length), they share several features, both cranial and postcranial, that recover them as a monophyletic group in updated phylogenies. The record of the group in S...
With 17 species formally identified throughout the world, Rebbachisauridae is, at present, the best-represented group of South American diplodocoids, and it has a temporal record ranging from the Barremian up to the Turonian. Defined as all diplodocoids more closely related to Rebbachisaurus garasbae than to Diplodocus carnegii, these sauropods are...
Titanosaurian sauropods were the most diverse and successful group of large-bodied terrestrial herbivores. Two aspects regarding their evolutionary history stand out, namely their great morphological diversity and their extensive record from various continental masses. In South America, and particularly in Argentina, the group has the richest recor...
Diplodocid neuroanatomy is known from four Late Jurassic forms from North America and Africa. Recently, a partial braincase of a diplodocid sauropod (MMCh-Pv- 232), tentatively assigned to Leinkupal laticauda Gallina et al., 2014, preserving a complete basicranium, right laterosphenoid, prootic, parietal, otooccipital and right half of the supraocc...
An isolated vertebra from the Late Cretaceous of Uzbekistan (Asia), previously interpreted as a titanosaur anterior caudal, was recently assigned as the holotype and unique specimen of a new rebbachisaurid taxon, Dzharatitanis kingi. This record would drastically impact both biogeographical and chronological aspects of the group. As some of the cha...
The titanosaur sauropod record of Patagonia, mainly recovered from Upper Cretaceous strata, is probably the richest worldwide. Here
we present a new sauropod dinosaur, Ninjatitan zapatai gen. et sp. nov., from the Lower Cretaceous Bajada Colorada Formation (Berriasian–
Valanginian) of north Patagonia (Neuquén Province, Argentina), from which postcr...
An isolated vertebra from the Late Cretaceous of Uzbekistan (Asia), previously interpreted as a titanosaur anterior caudal, was recently assigned as the holotype and unique specimen of a new rebbachisaurid taxon, Dzharatitanis kingi. This record would drastically impact both biogeographical and chronological aspects of the group. As some of the cha...
Yamanasaurus lojaensis gen. et sp. nov. is a new titanosaur (Saurischia, Sauropoda) from the Upper Cretaceous of the Alamor-Lancones Basin, southern Ecuador. The fossil remains were found in rocks of the Río Playas Formation, which is regarded as Campanian–Maastrichtian in age. Remains include a partial sacrum, a partial mid-caudal vertebra, and se...
Dicraeosaurids are a group of sauropod dinosaurs characterized by a distinctive vertebral column with paired, long, neural spines, present in an extreme fashion in the South American form Amargasaurus cazaui. This distinctive morphology has been interpreted as a support structure for a thermoregulatory sail, a padded crest for display, a dorsal hum...
Bones in the fossil record sometimes exhibit unusual structures that can be attributed to pathologies, taphonomic alterations, or morphological variation. The goal of this work is to describe three bone abnormalities present in the type specimen of Bonitasaura salgadoi from the Cretaceous of north Patagonia, Argentina. The studied material correspo...
Here, we describe new theropod materials (several isolated teeth, an axis, two caudal centra and a proximal left tibia) from the type locality of the Bajada Colorada Formation (Lower Cretaceous, Berriasian–Valanginian). Although fragmentary, the recovered material shows a diverse association of meat-eating dinosaurs for this poorly understood perio...
The original material assigned to Laplatasaurus araukanicus Huene come from five different localities in northern Patagonia (Argentina) where the Upper Cretaceous (Campanian) lies exposed. This material includes several postcranial bones from multiple specimens and showing different conditions of preservation, often lacking anatomical overlap. The...
Bonitasaura salgadoi, from the Bajo de la Carpa Formation (Santonian), Río Negro, Argentina, is a well-preserved titanosaur. Previously described cranial material of Bonitasaura demonstrated the presence of square jaws in titanosaurs, but the nearly complete postcranium of the holotype specimen remains mostly undescribed. We present an osteological...
Diplodocids are by far the most emblematic sauropod dinosaurs. They are part of Diplodocoidea, a vast clade whose other members are well-known from Jurassic and Cretaceous strata in Africa, Europe, North and South America. However, Diplodocids were never certainly recognized from the Cretaceous or in any other southern land mass besides Africa. Her...
The titanosaur sauropod Bonatitan reigi is redescribed. The material collected, originally interpreted as pertaining to two different individuals, is reorganised in five individuals, and the original type specimen is separated into three different individuals. One of the braincases is designated as a new type specimen. Some materials are described...
BONE HISTOLOGY OF THE TITANOSAUR BONITASAURA SALGADOI (DINOSAURIA: SAUROPODA) FROM THE UPPER CRETACEOUS OF PATAGONIA. The bone histology analysis of the titanosaur Bonitasaura salgadoi, from Río Negro Province, Argentina, was analysed in detail. It represents the first complete histological characterization of a South American sauropod based on a s...
Sauropod haemal arches are caudal bony structures that have been traditionally incorporated into two different types observed in different anatomical views: Y-shaped (anterior view) and forked (lateral view). This research proposes a classification combining information observed in anterior and lateral views. Four types of ‘Y-shaped’ and six types...
Here we report a superbly preserved and profusely represented five-ichnotaxa dinosaur track assemblage near Icla village, 100 km southeast of Sucre, Bolivia. As preserved in reddish Jurassic-Cretaceous boundary aeolian sandstones, this rich and uncommon assemblage is, additionally, the oldest dinosaur tracksite for Bolivia. Four trackmakers were id...
Sauropod axial anatomy is particularly important in understanding morphological features and phylogenetic analyses. Spatial arrangement of zygapophyses and rib articulations, as well as their complex laminar development, help to recognize the relative position of isolated vertebral elements. The presence of anterior, mid and posterior elements alon...
Rebbachisauridae are poorly known 'bizarre' sauropods with two nearly complete skeletons collected: Limaysaurus tessonei and Nigersaurus taqueti. Whereas the latter taxon allowed the understanding of their cranial novelties, other species show some peculiarities in the postcranium. L. tessonei, Rebbachisaurus garasbae and a new form (MMCH-Pv-49) fr...
The musculoskeletal hindlimb anatomy of the alligatorid Caiman latirostris Daudin is presented. The description includes origin and insertion sites as well as anatomical function of the pelvic and proximal hindlimb musculature. The hindlimb anatomy of C. latirostris described here is rather conservative when compared to that of other extant crocodi...
Rebbachisauridae are poorly known 'bizarre' sauropods with two nearly complete skeletons collected: Limaysaurus tessonei and Nigersaurus taqueti. Whereas the latter taxon allowed the understanding of their cranial novelties, other species show some peculiarities in the postcranium. L. tessonei, Rebbachisaurus garasbae and a new form (MMCH-Pv-49) fr...
S. 2011. Cranial anatomy and phylogenetic position of the titanosaurian sauropod Bonita− saura salgadoi. Acta Palaeontologica Polonica 56 (1): 45–60. Knowledge of titanosaurian cranial anatomy has improved substantially in the last decade because several skulls have come to light or were restudied. The discovery of Bonitasaura salgadoi, a partial t...
«La Bonit'«La Bonita» is a fossiliferous locality close to the town of Cerro Policía, Río Negro Province, Argentina. At the quarry are exposed siliceous rocks belonging to the Bajo de la Carpa and Anacleto formations (Santonian-Campanian), separated by an unconformity from the Rentería Formation (Upper Pliocene-Pleistocene). The Bajo de la Carpa Fo...
A great amount of the sauropod record is based on caudal vertebrae. Morphological analyses of tail bones until recently were essentially focused on centrum shape, with other anatomical features being poorly studied. A detailed description of anterior caudal transverse processes (ACTP) is presented here in order to improve the scarce knowledge of th...
A new mid-sized sauropod from 'La Buitrera', Huincul Formation (Turonian-Coniacian), Río Negro Province, Cathartesaura anaerobica gen. et sp. nov. is described. It is known from an incomplete, but associated skeleton that includes diagnostic postcranial elements such as a posterior cervical, an anterior caudal, and a mid caudal vertebra, a left sca...
During the Late Cretaceous, sauropods experienced a decrease in their high-level diversity. Titanosaurs, however, experienced an increase. By Santonian to Campanian times, Patagonian titanosaur diversity included the last amphyplathian-tailed taxa as well as the highest diversity of procoelous forms, including the first saltasaurines, probably orig...
The rebbachisaurid sauropods were poorly known in South America by 2002, and this is the first description of one of the first four taxa.
