Ignacio Díaz Martínez

Ignacio Díaz Martínez
Universidad Nacional de Río Negro | UNRN · Research Institute of Paleobiology and Geology

PhD

About

137
Publications
46,017
Reads
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931
Citations
Citations since 2016
85 Research Items
800 Citations
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
Introduction
My research mainly concerns the study of vertebrate footprints taking into account an ichnotaxonomical approach and the relationships between the footprints and the trackmaker. I also study theropod and ornithopod feet osteology and functional anatomy. Complete CV here https://drive.google.com/file/d/1DDtYu3QYL-rBteeSzKTvaxgMUIGS7L0U/view?usp=sharing
Additional affiliations
April 2017 - present
Universidad Nacional de Río Negro
Position
  • Professor (Associate)
April 2014 - present
Universidad Nacional de Río Negro
Position
  • PostDoc Position
April 2014 - present
Universidad Nacional de Río Negro
Position
  • Lecturer Taphonomy and Paleoecology

Publications

Publications (137)
Article
Full-text available
The Campanian Anacleto Formation holds an abundant and diverse ichnofossil and body-fossil vertebrate record. Despite the striking diversity of this record, pterosaur fossils had never been described from the unit. Here, we report four pterosaur manus tracks from fluvial red beds cropping out in the Área Natural Protegida Municipal Paso Córdoba (Rí...
Article
Full-text available
Hominin footprints were recently discovered at Matalascañas (Huelva; South of Iberian Peninsula). They were dated thanks to a previous study in deposits of the Asperillo cliff to 106 ± 19 ka, Upper Pleistocene, making Neandertals the most likely track-makers. In this paper, we report new Optically Stimulated Luminescence dating that places the homi...
Poster
Full-text available
The dating of sites occupied by hominins is a key element in order to understand their evolution. It provides information on the spatio-temporal distribution of taxa, which is essential to infer their appearance, migration and disappearance. The knowledge of the chronological context is particularly important when studying hominin footprints since...
Article
Albian dinosaur tracks from the Monte Grande Formation (Basque-Cantabrian Basin) are described. Sedimentary succession shows seven different facies associations (FA) with four track-bearing levels (levels 1-4) of a braid delta system. The FA4, a proximal crevasse subdelta, preserves in levels 2 and 3 theropod, possibly sauropod and undetermined din...
Article
Two new ornithopod natural casts are reported from the Praia do Areia do Mastro site, at Espichel Cape (near Sesimbra), western central mainland Portugal (western Iberia). In this Tracksite two geological formations occur: Areia do Mastro Formation and Papo-Seco Formation (lower Barremian). This locality (Praia do Areia do Mastro) occurs in a sedim...
Article
Full-text available
Les empreintes de pieds sont un vestige paléoanthropologique unique représentant de brefs moments de vie. Elles fournissent de nombreuses informations comme la taille et la composition des groupes qui les ont laissés mais sont rares dans le registre fossile par rapport au matériel ostéologique et archéologique. Cette rareté est notamment importante...
Article
Les empreintes de pieds sont un vestige paléoanthropologique unique représentant de brefs moments de vie. Elles fournissent de nombreuses informations comme la taille et la composition des groupes qui les ont laissés mais sont rares dans le registre fossile par rapport au matériel ostéologique et archéologique. Cette rareté est notamment importante...
Article
Full-text available
Theropod behaviour and biodynamics are intriguing questions that paleontology has been trying to resolve for a long time. The lack of extant groups with similar bipedalism has made it hard to answer some of the questions on the matter, yet theoretical biomechanical models have shed some light on the question of how fast theropods could run and what...
Conference Paper
Full-text available
At least 700 crocodylomorph trace fossils were discovered in 2021 at Ribeira do Chapim tracksite (Cabo Espichel, Sesimbra, SW Portugal) in one limestone bed on top of the Areia do Mastro Formation (lower Barremian), deposited in a carbonate shallow lagoon environment, under a tropical climate. The footprints have several sizes. The arrangement of s...
Presentation
Full-text available
This new tracksite, at Ribeira do Chapim, is located about 1 km north of Cabo Espichel and it is a stream with seasonal water (during winter) that flows into Boca do Chapim site. The footprints are in an area enlarged by the erosion of the stream. The tracksite is composed by two different areas (bounded in red) both with footprints and swimming tr...
Poster
Full-text available
Hominin footprints represent a unique vestige giving access to brief moments of life, an unusual time scale in archaeology or palaeoanthropology. They provide information not only on the locomotor behaviour of individuals (locomotor anatomy including soft tissue, motion capture) but also on the size and composition of the groups that made them, par...
Article
Full-text available
Sauropod remains are abundant on the Iberian Peninsula across the Jurassic-Cretaceous transition. Where the osteological record shows a high diversity of this kind of dinosaur, the ichnological findings are mainly limited to sauropod tracks characterized by kidney-shaped manus (with or without pollex impressions) and pes impressions with three claw...
Preprint
Full-text available
Theropod behaviour and biodynamics are intriguing questions that paleontology has been trying to resolve for a long time. The lack of extant groups with similar bipedalism has made it hard to answer some of the questions on the matter, yet theoretical biomechanical models have shed some light on the question of how fast theropods could run and what...
Article
The discovery of theropod shed teeth associated with sauropod remains is relatively common in Cretaceous deposits of Patagonia. However, only a handful of studies have thoroughly explored the phylogenetic affinities of the theropod dental material. Here, we describe and identify twelve theropod shed teeth associated with a partially complete skelet...
Article
The Los Menucos Complex (North Patagonian Massif, Río Negro province, Argentina) has been long regarded as Late Triassic in age. A Dicynodontipus-dominated record is historically known from this complex and particularly from the Puesto Tscherig locality. Here we report the Puesto Vera site, where a new track-bearing horizon was discovered within a...
Article
Full-text available
Stromatolites are biogenic sedimentary structures formed by the interplay of biological (microbial composition) and environmental factors (local hydrodynamic conditions, clastic input and/or water chemistry). Well-preserved, three-dimensional (3D) fossil stromatolites are key to assessing the environmental factors controlling their growth and resul...
Article
The Yacoraite Formation is a worldwide known unit due to the diversity and abundance of vertebrate ichnological record. The complex tectono-sedimentary evolution related to the Andean Cycle generated high dip angles of bedding and, consequently, large tracksites are not easily accessible, making hard the ichnological analysis. Here, we describe a n...
Article
Full-text available
Here, we report the recent discovery of 87 Neandertal footprints on the Southwest of the Iberian Peninsula (Doñana shoreline, Spain) located on an upper Pleistocene aeolian littoral setting (about 106 ± 19 kyr). Morphometric comparisons, high resolution digital photogrammetric 3D models and detailed sedimentary analysis have been provided to charac...
Article
The paleopathological record provides relevant information about paleobiology and paleoecology of fossil organisms. Based on the information obtained from paleopathologies, it is possible to infer how these injuries affected inter- and intraspecific relationships among organisms, and their interaction with the environment. For instance, fractures a...
Article
Several dinosaur tridactyl tracks showing inter- and intra-trackways morphological variations from the Cenomanian Candeleros Formation of the Neuquén Basin, Argentina, have been documented. Footprints occur on three different stratigraphic levels and are impressed on medium-grained sandstone of fluvial origin. Level 1 includes deep tridactyl tracks...
Article
Humankind began with extra-planetary expeditions in the 1960s. To date, more than fifty manned and unmanned lunar missions have taken place. Maybe, the most iconic image of these campaigns is the bootprint left and photographed by the astronaut Edwin Aldrin. Nevertheless, there is also other evidence of human activities on the Moon, such as rover t...
Conference Paper
Full-text available
A track-bearing slab (MNHN. F. AC10007) from the Stolling Formation of Hessberg (Hildburghausen, Thuringia, central Germany) is housed in the Muséum national d'Histoire naturalle of Paris, France, Since 1835.
Article
Although the Neuquén Basin (Argentina) has an extensive record of fossil vertebrates for the Upper Cretaceous, little is known about the Early Cretaceous vertebrate faunas. The Mulichinco Formation (early Valanginian), where some dinosaur bone sites were found, provides important additional insights into the composition of continental fauna of that...
Article
Full-text available
Septiembre 2020 402 Volumen 77 (3): DESARROLLOS RECIENTES EN ICNOLOGÍA ARGENTINA Vertebrate tracks of the Río Negro province, Patagonia, Argentina: stratigraphy, palaeobiology and environmental contexts ABSTRACT To date, the tetrapod ichnological record in the Río Negro province, Argentina, is known from six areas from the Permo-Triassic to Neogene...
Article
The study of palaeopathology provides valuable information about injury and behaviour in extinct organisms. Appendicular pathologies are interesting as they directly affect mobility and therefore the ability of an animal to survive. Here, the injuries recorded in the left pes of the neornithischian Othnielosaurus consors are described. The implicat...
Article
Tetrapod limbs morphology is a reliable proxy of locomotor capacities. Beyond this, other aspects of life habits, such as predation abilities, can also be relevant to determine main morphofunctional appendicular properties, which ultimately reflect a compromise between different factors of the biological role. Dromaeosauridae is a dinosaur clade be...
Article
Full-text available
We present a new locality with at least 880 vertebrate tracks found at the top of a limestone bed from the lower Miocene Tudela Formation (Spain). The trampled surface was formed by artiodactyls that crossed a muddy carbonate accumulated under the influence of water level variations in a palustrine environment. The tracks reflect different types of...
Article
Gregarious behaviour among dinosaurs has been inferred from several lines of evidence (monospecific bonebeds, skeletal morphology, phylogenetic inferences, comparison with modern ecosystems and parallel trackways with particular characteristics), but is relatively poorly documented for non-avian theropods. Here, we report five parallel theropod tra...
Conference Paper
Full-text available
El Museo Estación Cultural en la localidad de Fernández Oro (Río Negro, Argentina) es el escenario de un proyecto de investigación y creación artística cuyo objetivo es diseñar un espacio de ciencias que plantee nuevos significados a las colecciones geológicas, paleontológicas y arqueológicas que forman parte de su patrimonio. La piedra angular del...
Conference Paper
Full-text available
En el Área Municipal Natural Protegida Paso Córdoba, provincia de Río Negro, Argentina, las facies fluvio-lacustres de la Formación Anacleto (Campaniano inferior), pasan transicionalmente a facies eólicas de la Formación Allen (Campaniano superior–Maastrichtiano inferior). En el sector superior de esta última, hay desarrollo de depósitos de dunas d...
Conference Paper
Full-text available
Se presentan los primeros resultados del estudio paleoecológico y tafonómico de un conjunto de restos de macro y microfósiles acuáticos continentales del Cretácico Superior del área Natural Municipal Protegida Paso Córdoba (General Roca, Río Negro). Las muestras provienen de estratos situados en la transición entre las fangolitas fluvio-lacustres d...
Conference Paper
Full-text available
La Formación Bajo de la Carpa (Grupo Neuquén) aflora ampliamente en el borde de la margen sur del río Negro, en el Área Municipal Natural Protegida Paso Córdoba, provincia de Río Negro, Argentina. En dichos afloramientos son abundantes los restos óseos fósiles de serpientes, cocodrilos y dinosaurios terópodos no avianos. En la presente unidad, pred...
Chapter
Full-text available
Objetivo del Módulo 1: Introducir al participante del curso EDX DINOSAURIOS DE LA PATAGONIA a la historia de los descubrimientos de fósiles de dinosaurios en Argentina haciendo hincapié en los lugares donde se realizaron y las personas que lo hicieron posible.
Conference Paper
Full-text available
Gregarious behaviour is an important aspect of dinosaur paleoecology and has been inferred from several evidences: monospecific bonebeds, skeletal morphology, phylogenetic inferences, comparison with modern ecosystems and parallel trackways. Nevertheless, it is relatively poorly documented and understood among non-avian theropods. In the Cenomanian...
Article
The western Pyrenees is a territory with a remarkable geodiversity and an important fossil record, which constitutes a large archive of palaeobiodiversity. With respect to the vertebrate fossil record, the western Pyrenees (Basque-Cantabrian Region, Pamplona Basin and the north-western sector of the Ebro Basin) are relevant both from the point of v...
Conference Paper
El Área Natural Municipal Protegida Paso Córdoba está ubicada 15 km al sur de la localidad de General Roca. En los últimos años, dicho lugar ha sido motivo de estudios sedimentológicos, taxonómicos, icnológicos y tafonómicos. Allí afloran estratos del Cretácico Superior pertenecientes al Grupo Neuquén (Formaciones Bajo de la Carpa y Anacleto) y al...
Conference Paper
Megaraptorids constitute a recently recognized new clade of theropod dinosaurs that have been documented in Africa, Oceania, and Asia, although the most abundant record comes from South America and especially from Argentina. Here we report a new megaraptoran specimen (MCNA-PV 3109 to 3117 and 5119 to 5123) recovered from Cañadón Amarillo in out-cro...
Article
The morphology of fossil footprints is the basis of vertebrate footprint ichnology. However, the processes acting during and after trace fossil registration which are responsible for the final morphology have never been precisely defined, resulting in a dearth of nomenclature. Therefore, we discuss the concepts of ichnotaphonomy, ichnostratinomy, t...
Article
Full-text available
Dinosaurs are extremely abundant in the Upper Cretaceous Neuquén Group of the Neuquén Basin (Argentina). Nevertheless, while osteological remains are rich the ichnological record is more restricted. A new sauropod dinosaur trackway with five manus-pes imprint sets discovered in the Cenomanian Candeleros Formation is described here. The trackway bel...
Preprint
Full-text available
Unenlagiinae is mostly recognized as a subclade of dromaeosaurids. They have the modified pedal digit II that characterize all dromeosaurids, which is typically related to predation. However, derived Laurasian dromaeosaurids (eudromaeosaurs) differ from unenlagiines in having a shorter metatarsus and pedal phalanx II-1, and more ginglymoid articula...
Conference Paper
Full-text available
Fieldwork is crucial in palaeontological studies. Both when the fossils are being exposed from the site and when they are studied in situ. Therefore, an exhaustive documentation of these remains and their reciprocal position within the rocks are necessary for further study, including taphonomical, palaeoecological, and systematical analyses. For th...
Conference Paper
Full-text available
Fossil tracks provide direct information of the activity of a trackmaker during the interaction with the substrate. Track morphology can exhibit differences as a response to changes in substrate physical parameters like humidity, grain-size and sediment composition, as well as response to the limb dynamics and foot anatomy of the trackmaker. Recent...
Article
The Los Menucos locality in Patagonia, Argentina, bears a well-known ichnofauna mostly documented by small therapsid footprints. Within this ichnofauna, large pentadactyl footprints are also represented but to date were relatively underinvestigated. These footprints are here analyzed and discussed based on palaeobiological indications (i.e., trackm...
Data
Limb and autopod posture in the Pentasauropus trackmaker Simplified and in vivo speculative reconstruction (based on Dinodontosaurus) showing the semi erect posture of fore and hind limbs and the subunguligrade plantiportal posture of the autopods in the Pentasauropus trackmaker. In colour the possible extension of the fleshy cushion on which the b...
Article
Full-text available
La fotogrametría es una disciplina que permite reconstruir un objeto en tres dimensiones mediante fotografías sacadas desde diferentes ángulos. En los últimos años ha habido un apogeo del estudio de fósiles por medio de visualizaciones digitales tridimensionales. Sus ventajas para la investigación paleontológica son evidentes: se trata de una técni...
Article
Full-text available
El patrimonio paleontológico en nuestro país ha sido objeto de discusión entre científicos y legisladores desde su controvertida consideración dentro del patrimonio histórico en la Ley 16/1985, de 25 de junio, del Patrimonio Histórico Español. Así, tanto el patrimonio inmueble (yacimientos) como el mueble (ejemplares ex situ alojados en museos, col...
Article
Full-text available
El área natural protegida Paso Córdoba, creada por ordenanza 2583 de septiembre de 1997, posee unas 17.000 ha de superficie. Allí afloran sedimentos del Cretácico Superior y del Mioceno-Plioceno. l área posee varios puntos de especial interés geológico y paleontológico, entre ellos, los llamados valles de la luna Rojo (Cretácico) y Amarillo (Mio-Pl...
Article
An enlarged theropod manual ungual (CSC1-4) from the Weald facies of Spain is described. The claw was found in the fossil locality of Caña Seca 1, Teruel province, within the El Castellar Formation of early Barremian (Early Cretaceous) in age. CSC1-4 is morphologically closer to megalosauroids than to any other theropod clade bearing enlarged manu...
Article
The Paso Córdoba fossiliferous site (Río Negro, Northern Patagonia) is one of the first Mesozoic fossiliferous localities studied in Argentina. There, turtle, crocodile and dinosaur remains as well as dinosaur and bird tracks have been recorded. Recently, a new locality with vertebrate tracks, the Cañadón del Desvío, has been discovered in Paso Cór...
Article
Full-text available
The collection and dissemination of vertebrate ichnological data is struggling to keep up with techniques that are becoming commonplace in the wider palaeontological field. A standard protocol is required to ensure that data is recorded, presented and archived in a manner that will be useful both to contemporary researchers, and to future generatio...
Conference Paper
Full-text available
A new association of continental vertebrate remains found in the lower section of the Mulichinco Formation (Valanginian), 10 km north of Las Lajas, are focus of taphonomic studies. The facies associations correspond to the deposit of fluvial channel, with lateral migration bars and scarce development of floodplains. The fossils are found in a tabul...
Article
Full-text available
A relative long sauropod trackway and hundreds of varied indeterminate dinosaur tracks, many of them probably related to ornitischians, were found many years ago in the Valle del Tonco tracksite (Salta, northwestern Argentina). This sauropod trackway is now described and analyzed in an updated context. Ichnological analyses were mainly conducted du...