Bernardo Javier González Riga
bgonriga@yahoo.com.ar
González Riga
Datos Generales

Bernardo Javier González Riga - ARGENTINA
IANIGLA - CONICET - Paleontología de Vertebrados

54-261 5244216 Extensión: 4216
E-mail: bgonriga@yahoo.com.ar
Formación
Título de Grado
Geólogo
Título de Postgrado
Doctor en Ciencias Geológicas (orientación especial: paleontología de dinosaurios)
Áreas de Actuación

I am a geologist and a vertebrate paleontologist interested in studying dinosaur evolution and paleoenvironments. My Ph.D. dissertation and my current research focus on titanosaurs, the most diverse lineage of long-necked sauropod dinosaurs. Titanosaurs are the largest land-living animals of all time, and their study is very interesting from the palebiological point of view. Likewise, I am researching theropod dinosaurs associated to sauropods.

My papers comprise several aspects of these huge vertebrates: phylogenetic systematic, taphonomy, osteohistology, and ichnology.

I discovered or participate in the description of several new titanosaur species: Mendozasaurus neguyelap, Rinconsaurus caudamirus, Futalognkosaurus dukei, Muyelensaurus pecheni, Malarguesaurus florenciae and Ligabuesaurus leanzai.

With regards to taphonomy, I am interested in understanding the history of quarry sauropods and their relation with ancient environments. Other important aspects of my research are the study of bone histology to explore and reconstruct growth patterns, and the analysis of sauropod tracks.

To these ends, I also conduct field research in Mendoza, La Pampa and Patagonia (Argentina). I am a Researcher of CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina) and a Professor of the Universidad Nacional de Cuyo (Mendoza Province). I teach "Geological Sciences" and courses of "Science Methodology".

IMPORTANT:

- For more information, you can see this web: http://amazing-sauropods.blogspot.com/

- If you need copies of scientific articles, send me an e-mail: bgonriga@yahoo.com.ar

 

 

Proyectos
Proyectos Realizados
  

    


    


    


    

Producción Bibliográfica

Articulos Publicados

Si usted desea copia de mis articulos científicos, puede solicitarlas por correo electrónico: bgonriga@yahoo.com.ar

 

Publicaciones

Artículos
  • Título: Taphonomic analyses of titanosaur sauropods from the Neuquén Basin (Argentina) and their implications in systematic studies
    Autor/es: González Riga, Bernardo Javier; Calvo, Jorge; Previtera, Elena;
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  • Título: Hallazgo de vertebrados fósiles en la Formación Loncoche, Cretácico Superior de la Provincia de Mendoza, Argentina
    Autor/es: González Riga, Bernardo Javier;
    Año: 1999
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  • Título: Primer registro de Dinosauria (Ornithischia, Hadrosauridae) para la provincia de La Pampa (Argentina) y sus implicancias paleobiogeográficas
    Autor/es: González Riga, Bernardo Javier; Casadío, Silvio;
    Año: 2000
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  • Título: Rinconsaurus caudamirus gen. et sp. nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina
    Autor/es: Calvo, Jorge; González Riga, Bernardo Javier;
    Año: 2003
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  • Título: A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza Province, Argentina
    Autor/es: González Riga, Bernardo Javier;
    Año: 2003
    Resumen: (Mendozasaurus neguyelap gen. et sp. nov.)
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  • Título: Nuevos restos fósiles de Mendozasaurus neguyelap (Sauropoda: Titanosauridae) del Cretácico Tardío de Mendoza, Argentina
    Autor/es: González Riga, Bernardo Javier;
    Año: 2005
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  • Título: Ligabuesaurus leanzai nov. gen. et sp., a new titanosaur from the Aptian of Patagonia, Argentina
    Autor/es: Bonaparte, José Fernando; González Riga, Bernardo Javier; Apesteguía, Sebastián;
    Año: 2006
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  • Título: Hallazgo de mamíferos en la Formación Mariño (Mioceno Medio) en Divisadero Largo (Mendoza, Argentina).
    Autor/es: Cerdeño, María Esperanza; González Riga, Bernardo Javier; Bordonaro, Osvaldo;
    Año: 2006
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  • Título: Preservation of large titanosaur sauropods in overbank fluvial facies: a case study in the Cretaceous of Argentina
    Autor/es: González Riga, Bernardo Javier; Astini, Ricardo A.;
    Año: 2007
    Resumen: Patagonia exhibits a particularly abundant record of Cretaceous dinosaurs with worldwide relevance. Although paleontological studies are relatively numerous, few include taphonomic information about these faunas. This contribution provides the first detailed sedimentological and taphonomical analyses of a dinosaur bone quarry from northern Neuquén Basin. At Arroyo Seco (Mendoza Province, Argentina), a large parautochthonous/autochthonous accumulation of articulated and disarticulated bones that represent several sauropod individuals has been discovered. The fossil remains, assigned to Mendozasaurus neguyelap González Riga, correspond to a large (18–27 m long) sauropod titanosaur collected in the strata of the Río Neuquén Subgroup (late Turoronian–late Coniacian). A taphonomic viewpoint recognizes a two-fold division into biostratinomic and fossil-diagenetic processes. Biostratinomic processes include (1) subaerial biodegradation of sauropod carcasses on well-drained floodplains, (2) partial or total skeletal disarticulation, (3) reorientation of bones by sporadic overbank flows, and (4) subaerial weathering. Fossil-diagenetic processes include (1) plastic deformation of bones, (2) initial permineralization with hematite, (3) fracturing and brittle deformation due to lithostatic pressure; (4) secondary permineralization with calcite in vascular canals and fractures, and (5) post-fossilization bone weathering. This type of bone concentration, also present in Rincón de los Sauces (northern Patagonia), suggests that overbank facies tended to accumulate large titanosaur bones. This taphonomic mode, referred to as " overbank bone assemblages," outlines the potential of crevasse splay facies as important sources of paleontological data in Cretaceous meandering fluvial systems.
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  • Título: A new Cretaceous terrestrial ecosystem from Gondwana with the description of a new sauropod dinosaur.
    Autor/es: Calvo, Jorge; Porfiri, Juan; González Riga, Bernardo Javier; Kellner, Alexander;
    Año: 2007
    Resumen: (Furalongkosaurus deukei. gen. et. sp. nov.)
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  • Título: a new titanosaur sauropod from the Late Cretaceous of Neuquén, Patagonia, Argentina
    Autor/es: Calvo, Jorge; González Riga, Bernardo Javier; Porfiri, Juan;
    Año: 2007
    Resumen: (Muyelensaurus pecheni gen et sp. nov.)
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  • Título: Malarguesaurus florenciae gen. et sp. nov., a new titanosauriform (Dinosauria, Sauropoda) from the Late Cretaceous of Mendoza, Neuquén Basin, Argentina
    Autor/es: González Riga, Bernardo Javier; Previtera, Elena; Pirrone, Cecilia Anabel;
    Año: 2009
    Resumen: Malarguesaurus florenciae gen. et sp. nov. is a new and robust somphospondylian titanosauriform (Dinosauria, Sauropoda) from the Neuquén Basin, Mendoza Province, Argentina. The specimen comes from Upper Cretaceous strata assigned to the Portezuelo Formation (late Turonian-early Coniacian). It includes proximal, middle and distal caudal vertebrae, chevrons, dorsal ribs, and appendicular bones. Malarguesaurus is characterized by the following association of characters: (1) proximal caudal neural spines vertically directed, with a concave caudal border, and a caudodorsal corner forming a right angle; (2) procoelous-opisthoplatyan proximal and middle caudal vertebrae associated with procoelous distal caudal centra; and (3) distal caudal neural spines having a concave and depressed dorsal border. A preliminar cladistic analysis placed (Ligabuesaurus + (Malarguesaurus + Phuwiangosaurus)) as a sister taxon of Titanosauria. Unique among the titanosauriforms, Malarguesaurus has procoelous distal caudal centra associated with procoelous-opisthoplatyan proximal caudals. This discovery is a new evidence of the morphologic diversity of the South American sauropods.
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  • Título: A NEW WIDE-GAUGE SAUROPOD TRACK SITE FROM THE LATE CRETACEOUS OF MENDOZA, NEUQUÉN BASIN, ARGENTINA
    Autor/es: González Riga, Bernardo Javier; Calvo, Jorge;
    Año: 2009
    Resumen: Agua del Choique is a new Late Cretaceous sauropod track site from Mendoza Province, Neuquén Basin, Argentina. It is situated in the Loncoche Formation, late Campanian – early Maastrichthian in age, and is one of the youngest sauropod tracks site recorded in the world. Agua del Choique represents a lake setting and river-dominated delta deposits, and comprises at least 160 well-preserved tracks, located on a calcareous sandstone bed. A new ichnotaxon, Titanopodus mendozensis ichnogen. et ichnosp. nov., is erected for the footprints of this track site. T. mendozensis exhibits the following association of features: (1) wide-gauge trackway (manus and pes trackway ratios of 18-22 and 26-31 per cent, respectively), (2) pronounced heteropody (manus-pes area ratio of 1:3), (3) outer limits of trackway defined, in some cases, by the manus tracks, and (4) manus impression with an asymmetrical crescent contour and acuminate external border. T. mendozensis is an excellent case study of the wide-gauge style of locomotion produced by Late Cretaceous derived titanosaurs that have no impression of manual phalanges. These features, and the fossil record from the Loncoche Formation, suggest that the trackmakers were, probably, middle size saltasaurine or aeolosaurine titanosaurs (14-16 m long). Key words: Titanopodus mendozensis, Late Cretaceous, Neuquén Basin, Argentina
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  • Título: Speeds and stance of titanosaur sauropods: analysis of Titanopodus tracks from the Late Cretaceous of Mendoza, ArgentinaaeuoruospoofdMs:eanndaolzyas,isAorfgTenittainnoapodus tracks
    Autor/es: González Riga, Bernardo Javier;
    Año: 2011
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Capítulos
  • Título: Dinosaurs and environments from the Cretaceous of Mendoza Province, Argentina
    Autor/es: González Riga, Bernardo Javier;
    Libro: IANIGLA, 30 años de investigación básica y aplicada en ciencias ambientales
    Año del Libro: 2002
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  • Título: Paleobiology of South American titanosaurs
    Autor/es: González Riga, Bernardo Javier;
    Libro: Paleontologia y Dinosaurios desde America Latina
    Año del Libro: 2011
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  • Título: Vertebrados continentales mesozoicos
    Autor/es: Calvo, Jorge; Porfiri, Juan; Pol, Diego; González Riga, Bernardo J.; de la Fuente, Marcelo; Rougier, Guillermo;
    Libro: Relatorio de la Provincia del Neuquén
    Año del Libro: 2011
    Resumen: RESUMEN La Cuenca Neuquina está compuesta por una potente secuencia sedimentaria depositada en ambientes marinos y continentales que abarca el Mesozoico y Cenozoico. La misma se encuentra desarrollada mayormente en la provincia de Neuquén y ha brindado en los últimos años una enorme cantidad de hallazgos paleontológicos. Muchos de ellos son de gran importancia mundial y han producido importantes avances en el conocimiento científico, tanto por sus relaciones filogenéticas como por su importancia paleobiogeográfica. En este trabajo solo se describe el registro paleontológico de especies válidas de vertebrados continentales mesozoicos de la provincia del Neuquén. Palabras clave: Vertebrados, Continental, Mesozoico, Reptilia, Mamíferos, Neuquén ABSTRACT Mesozoic continental vertebrates.- The Neuquén Basin is composed by a thick Mesozoic and Cenozoic sedimentary sequence belonging to marine and continental environments. It is mainly developed on the Neuquén state and it has given, in the last few years, a numerous paleontological record. Many of these findings are of great world significance, and they have produced important improvements in the scientific knowledgement, both by its phylogenetic relationships and by its paleobiogeographic importance. In this paper, we just briefly describe the paleontological record of valid species from the continental Mesozoic vertebrates from the Neuquén province. Key words: Vertebrates, Continental, Mesozoic, Reptilia, Mammals, Neuquén
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