Rubén Darío Francisco Martínez

Rubén Darío Francisco Martínez
National University of Patagonia San Juan Bosco | UNPSJB · Departamento de Biología General

Doctor en Ciencias Biológicas

About

76
Publications
28,752
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1,457
Citations
Citations since 2017
10 Research Items
689 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Additional affiliations
July 1988 - April 2016
National University of Patagonia San Juan Bosco
Position
  • Principal Investigator

Publications

Publications (76)
Chapter
Full-text available
En la cuenca del Golfo San Jorge se encuentran unidades de origen continental reunidas en el Grupo Chubut (Barreamiano-Maastrichtiano) que son portadoras de un alto contenido fosilífero. Este registro paleontológico de vertebrados continentales cretácicos de la cuenca es una de los más diversos de América del Sur. Es relativamente escaso al momento...
Book
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Con el paso de los años nuestra percepción del tiempo sufre una curiosa deformación al acelerarse vertiginosamente año tras año, mes tras mes, día tras día, mientras que durante nuestra infancia los días se arrastraban interminables, tediosos, insoportables...Sin embargo siempre hay hechos que resaltan en nuestra adultez con vivos colores en el gri...
Article
Xenotarsosaurus bonapartei was the third abelisaurid theropod dinosaur to be named from Argentina. The holotype comprises two partial anterior dorsal vertebrae and a complete right hind limb from the Upper Cretaceous (lower Cenomanian–upper Turonian) Bajo Barreal Formation, central Patagonia, Argentina. The materials display morphological features...
Article
Full-text available
We describe two partial postcranial skeletons belonging to the enigmatic theropod dinosaur clade Megaraptoridae from the Upper Cretaceous (lower Cenomanian-upper Turonian) Bajo Barreal Formation of southern Chubut Province, central Patagonia, Argentina. The specimens are assigned to Megaraptoridae due to their possession of multiple anatomical feat...
Article
In this paper, we present an updated revision of fossil vertebrates from the Chubut Group, Golfo San Jorge Basin, while also describing some new remains. Extensive exposures of both Lower and Upper Cretaceous sedimentary sequences are present in central Patagonia. These outcrops have, over the past several decades, yielded a varied vertebrate fauna...
Article
Full-text available
Peirosaurid crocodyliforms were diverse and abundant in the Cretaceous of the Gondwanan landmasses, especially South America. Here, we describe Colhuehuapisuchus lunai, gen. et sp. nov., a new peirosaurid taxon from the Upper Cretaceous (Campanian-?lower Maastrichtian) Lago Colhué Huapi Formation of southern Chubut Province in central Patagonia, Ar...
Article
A new ornithopod dinosaur, the medium-sized Sektensaurus sanjuanboscoi gen. et sp nov. from the Coniacian–Maastricthian strata of the Lago Colhué Huapi Formation, Golfo San Jorge Basin, Patagonia, is here described. The specimen consists of disarticulated postcranial bones belonging to a single individual. It is diagnosed by an unique association o...
Article
Full-text available
Epachthosaurus sciuttoi is a basal titanosaur from the early Late Cretaceous of central Patagonia, Argentina. Here, we present the reconstruction of the pelvic and hindlimb musculature of this titanosaur, based on the soft tissue data of extant archosaurs. The majority of the pelvic, hindlimb and pes muscles are within a decisive and positive level...
Article
Full-text available
In dinosaurs and other archosaurs, the presence of foramina connected with internal chambers in axial and appendic-ular bones is regarded as a robust indicator of postcranial skeletal pneumaticity (PSP). Here we analyze PSP and its paleobiological implications in rebbachisaurid diplodocoid sauropod dinosaurs based primarily on the dorsal vertebrae...
Article
Full-text available
The Chubut Group, central Patagonia, Argentina, is characterized by a lacustrine and fluvial-lacustrine system with variable participation of volcanic ash. This group includes the Bajo Barreal Formation (Cenomanian-Turonian) and a recently nested new lithostratigraphic unit, the Lago Colhue Huapi Formation (Coniacian-Maastrichtian). The Lago Colhue...
Article
Full-text available
We describe Sarmientosaurus musacchioi gen. et sp. nov., a titanosaurian sauropod dinosaur from the Upper Cretaceous (Cenomanian-Turonian) Lower Member of the Bajo Barreal Formation of southern Chubut Province in central Patagonia, Argentina. The holotypic and only known specimen consists of an articulated, virtually complete skull and part of the...
Data
Animation of horizontal computed tomographic (CT) images of cranium of Sarmientosaurus musacchioi gen. et sp. nov. (MDT-PV 2). Positions of CT images indicated by orange line in digital visualization of cranium in right lateral view. Scale bar = 5 cm. (MOV)
Data
Animation of sagittal computed tomographic (CT) images of cranium of Sarmientosaurus musacchioi gen. et sp. nov. (MDT-PV 2). Positions of CT images indicated by orange line in digital visualization of cranium in dorsal view. Scale bar = 5 cm. (MOV)
Data
Data matrix for second iteration of second (i.e., based on Zaher et al. [14]) phylogenetic analysis of Sarmientosaurus musacchioi gen. et sp. nov. (22 ingroup taxa, 246 characters). (NEX)
Data
Data matrix for first iteration of first (i.e., 337 character) phylogenetic analysis of Sarmientosaurus musacchioi gen. et sp. nov. (22 ingroup taxa, 337 characters). (NEX)
Data
Data matrix for second iteration of first (i.e., 337 character) phylogenetic analysis of Sarmientosaurus musacchioi gen. et sp. nov. (24 ingroup taxa, 337 characters). (NEX)
Data
Data matrix for first iteration of second (i.e., based on Zaher et al. [14]) phylogenetic analysis of Sarmientosaurus musacchioi gen. et sp. nov. (31 ingroup taxa, 246 characters). (NEX)
Data
Animation of axial computed tomographic (CT) images of cranium of Sarmientosaurus musacchioi gen. et sp. nov. (MDT-PV 2). Positions of CT images indicated by orange line in digital visualization of cranium in right lateral view. Scale bar = 5 cm. (MOV)
Data
Animation of axial computed tomographic (CT) images of right (top) and left (bottom) mandibular rami of Sarmientosaurus musacchioi gen. et sp. nov. (MDT-PV 2). Positions of CT images indicated by orange line in digital visualizations of right and left mandibular rami in medial and lateral views, respectively. Scale bar = 5 cm. (MOV)
Data
Animation of sagittal computed tomographic (CT) images of right (top) and left (bottom) mandibular rami of Sarmientosaurus musacchioi gen. et sp. nov. (MDT-PV 2). Positions of CT images indicated by orange line in digital visualizations of right and left mandibular rami in caudal view. Scale bar = 5 cm. (MOV)
Data
Characters used in first (i.e., 337 character) phylogenetic analysis of Sarmientosaurus musacchioi gen. et sp. nov. (DOC)
Data
Data matrix for third iteration of first (i.e., 337 character) phylogenetic analysis of Sarmientosaurus musacchioi gen. et sp. nov. (25 ingroup taxa, 295 characters). (NEX)
Data
Data matrix for third iteration of second (i.e., based on Zaher et al. [14]) phylogenetic analysis of Sarmientosaurus musacchioi gen. et sp. nov. (23 ingroup taxa, 246 characters). (NEX)
Data
Animation of horizontal computed tomographic (CT) images of right (top) and left (bottom) mandibular rami of Sarmientosaurus musacchioi gen. et sp. nov. (MDT-PV 2). Positions of CT images indicated by orange line in digital visualizations of right and left mandibular rami in medial and lateral views, respectively. Scale bar = 5 cm. (MOV)
Article
Full-text available
Supraspinous ossified rods have been reported in the sacra of some derived sauropod dinosaurs. Although different hypotheses have been proposed to explain the origin of this structure, histological evidence has never been provided to support or reject any of them. In order to establish its origin, we analyse and characterize the microstructure of t...
Data
Full-text available
Rests of Aeolosaurus colhuehuapensis, a titanosaur from the Colhué Huapi lake, in the southern Chubut Province, Argentina, were analyzed. The materials under study include twenty one caudal vertebrae and seven haemal arches. They were recovered articulated in overbank facies related to deposits of multi-channel fluvial systems of high sinuosity in...
Article
Full-text available
Titanosaurian sauropod dinosaurs were the most diverse and abundant large-bodied herbivores in the southern continents during the final 30 million years of the Mesozoic Era. Several titanosaur species are regarded as the most massive land-living animals yet discovered; nevertheless, nearly all of these giant titanosaurs are known only from very inc...
Article
Full-text available
Rests of Aeolosaurus colhuehuapensis, a titanosaur from the Colhue Huapi lake, in the southern Chubut Province, Argentina, were analyzed. The materials under study include twenty one caudal vertebrae and seven haemal arches. They were recovered articulated in overbank facies related to deposits of multi-channel fluvial systems of high sinuosity in...
Article
Full-text available
The Bajo Barreal Formation (Cenomanian, Late Cretaceous; central Patagonia, Argentina) preserves an important and rich fossil record. Among the dinosaurs described, a small ornithischian, Notohypsilophon comodorensis, was named in the 1990s. This small-bodied dinosaur, the most complete representative of the group discovered in that formation, was...
Article
Full-text available
Cretaceous outcrops in southern South America preserve a rich and evolutionarily important record of sauropod dinosaurs. Among Sauropoda, South American titanosaurs have garnered particular interest due to their abundance and taxonomic diversity. Nevertheless, the fossil record of rebbachisaurids has also improved significantly in recent years, and...
Article
Full-text available
TAPHONOMY OF THE THEROPOD DINOSAUR ANIKSOSAURUS DARWINI, BAJO BARREAL FORMATION, LATE CRETACEOUS OF PATAGONIA (ARGENTINA). Aniksosaurus darwini is a coelurosaurian theropod from the Bajo Barreal Formation (Upper Cretaceous), south of Chubut Province, Patagonia, Argentina. The fossils include postcranial remains of 5 individuals and they were preser...
Article
Full-text available
We describe Katepensaurus goicoecheai, gen. et sp. nov., a diplodocoid sauropod dinosaur from the Bajo Barreal Formation (Upper Cretaceous: Cenomanian–Turonian) of south-central Chubut Province, central Patagonia, Argentina. The holotypic specimen is a closely associated partial axial skeleton that includes cervical, dorsal, and caudal vertebrae. T...
Article
Full-text available
Central Patagonia, Argentina, preserves an abundant and rich fossil record. Among vertebrate fossils from the Upper Cretaceous Bajo Barreal Formation of Patagonia, five individuals of the small, non-avian theropod dinosaur Aniksosaurus darwini were recovered. Group behavior is an important aspect of dinosaur paleoecology, but it is not well-documen...
Article
Full-text available
Aniksosaurus darwini is a coelurosaurian theropod from the Bajo Barreal Formation (Upper Cretaceous), south of Chubut province, Patagonia, Argentina. The fossils include postcranial remains of 5 individuals and they were preserved in a mantle overbank deposit associated to a fluvial system of low sinuosity. A detailed analysis on the biostratinomic...
Article
Full-text available
An associated partial postcranial skeleton is described as the third definitive ornithopod dinosaur record from the Upper Cretaceous Bajo Barreal Formation of central Patagonia, Argentina. Specifically, the specimen was recovered from the uppermost Cretaceous (Campanian—?Maastrichtian) Upper Member of the Bajo Barreal exposed on an ephemeral island...
Article
In order to analyze products and procedures that Comodoro Rivadavia population uses against head lice in school children, results from 4951 surveys obtained in 2006 and 2007 are presented. It is advantageous that 95% of the parents check frequently over the children scalps. About 56,4% uses appropriate preventive products or procedures, while the o...
Article
Full-text available
Theropod teeth from the Bajo Barreal Formation (Upper Cretaceous: Cenomanian–Turonian) at the “estancia Ocho Hermanos”, Chubut Province are described. Most of them show features of Abelisauroidea, a clade already represented in the Bajo Barreal Formation by Xenotarsosaurus bonapartei and other isolated remains including a left maxilla. Dromaeosauri...
Article
Full-text available
A new sauropod, Aeolosaurus colhuehuapensis sp. nov., based on an articulated caudal series recovered from an emergent island in Lago Colhué Huapi, Chubut Province is described. This series is characterized by neural arches located very anteriorly above the centrum and inclined forward; well-developed prezygapophyses projecting forward and upward,...
Conference Paper
Full-text available
RESUMO – É descrito aqui Aeolosaurus colhuehuapensis sp. nov. com base em uma série caudal articulada proveniente de uma ilha localizada no lago Colhué Huapi, Província de Chubut. Esta série é caracterizada por possuir arcos neurais localizados muito anteriormente em relação ao corpo vertebral e inclinados para frente; pré-zigapófises bem desenvolv...
Article
Full-text available
The theropod dinosaur Aniksosaurus darwini gen. et sp. nov. has been recovered from the Upper Cretaceous, Bajo Barreal Formation, of Central Patagonia. Aniksosaurus darwini gen. et sp. nov. was a small tetanurine, approximately 2 meters long. Aniksosaurus exhibits several unique traits (e.g., cranial cervical ver- tebrae with dorsoventrally deep ne...
Article
Full-text available
Here we report the discovery of abelisaurid remains from the Bajo Barreal Formation (Cenomanian-Coniacian) from the northern region of Santa Cruz Province, Patagonia, Argentina. The specimen represents the southernmost record of Abelisauridae in South America. It consists of six associated vertebrae, including cervical 10, dorsal 1, an isolated dor...
Article
Full-text available
We describe an articulated specimen of the titanosaurian sauropod Epachthosaurus sciuttoi from the early Late Cretaceous Bajo Barreal Formation of Chubut Province, central Patagonia, Argentina. The skeleton was found in tuffaceous sandstone, with its hindlimbs flexed and its forelimbs widely extended. It is slightly deformed on its left side. The s...
Article
Full-text available
A nearly complete, well-preserved maxilla of an abelisaurid theropod from the early Late Cretaceous (middle Cenomanian-Turonian) Lower Member of the Bajo Barreal Formation of Chubut, Argentina represents the first definitive member of the abelisaurid clade from pre-Senonian (Coniacian–Maastrichtian) deposits. The new maxilla shares derived characte...