Diego F. Muñoz

Diego F. Muñoz
National Scientific and Technical Research Council | conicet · CICTERRA - Centro de Investigaciones en Ciencias de la Tierra

PhD in Geological Sciences

About

40
Publications
6,677
Reads
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139
Citations
Citations since 2016
29 Research Items
135 Citations
201620172018201920202021202205101520
201620172018201920202021202205101520
201620172018201920202021202205101520
201620172018201920202021202205101520
Introduction
I´ve been studied Lower Ordovician brachiopods from NW Argentina basin from different perspectives. My PhD was about taphonomy, biostratigraphy, paleobiogeography, diversity and systematics of this group. Nowadays, I´m studying trace fossils from the same outcrops and I will expand to other Gondwana sites and also I would like to include the entire Paleozoic. My goals in ichnology are to understand macroevolutionary trends, paleoecology and paleoenvironmental significance of trace fossils.
Additional affiliations
April 2016 - present
National University of Cordoba, Argentina
Position
  • PostDoc Position
April 2014 - March 2016
National University of Cordoba, Argentina
Position
  • PhD Student
Education
October 2012 - February 2016
March 1997 - September 2009

Publications

Publications (40)
Article
Full-text available
The eoorthid brachiopod Apheoorthina is reported for the first time from the Lower Ordovician of NW Argentina. It is represented by a species similar to A. ferrigena from the Tremadocian of the Prague Basin, increasing the faunal affinities between the Central Andean Basin and the South European microcontinents, in particular the Bohemian region (P...
Article
Tremadocian–Floian siliciclastic successions in the Argentine Cordillera Oriental are of great interest for the study of early ostracod radiation. Four genera and five species of ostracods have so far been documented in the basin from the Early–Late Tremadocian (Tr2). This contrasts with occurrences from other palaeocontinental areas, where typical...
Preprint
Full-text available
This study focuses on upper Cambrian – Lower Ordovician strata containing the lowermost fossil-bearing levels of the basin (Santa Rosita Formation and Guayoc Chico Group). Bounded by two major regional unconformities, this stratigraphic interval was previously considered as a retro-arc foreland basin displaying evidence of westward progradation wit...
Article
The lower Paleozoic marine siliciclastic succession of the Central Andean Basin, northwestern Argentina, provides a valuable record of the onset of the Great Ordovician Biodiversification Event in western Gondwana. A new ichnospecies of rosette trace fossil, Gyrophyllites cristinae, is documented from lower and upper Tremadocian (Tr1 and Tr2) depos...
Article
Feeding trace fossils, produced by either deposit or detritus feeders and showing radial to rosetted morphology, are all included in the same architectural category. These radial to rosette ichnofossils are widely recorded worldwide throughout the Phanerozoic and have attracted the attention of numerous ichnologists for decades. Construction of a d...
Poster
Full-text available
The widely distributed Balcarce Formation (Tandilia System, southeastern Argentina) outcrops represent a shallow epicontinental sea with tidal influence, hosting a diverse ichnofauna. Previous research recognizes an Early Paleozoic age with certainty, and so far, the presence of Cruziana bonariensis suggests that it is probably Silurian. Further su...
Poster
Full-text available
Cruziana stratigraphy is a useful tool for Paleozoic successions lacking body fossils, mainly in “Grès Armoricain”-type lithologies. However, precise calibration of trilobite trace fossils relies on fossiliferous interbedded strata providing high-resolution biostratigraphic information. In particular, the stratigraphic range of Cruziana rugosa rugo...
Conference Paper
Full-text available
Se describen por primera vez en el Cuaternario de Chile trazas fósiles radiales en multiniveles, preservadas en los depósitos de terrazas marinas de la Cuenca de Caldera (norte de Chile, Desierto de Atacama). Esta nueva traza fósil pertenece a la categoría arquitectural de trazas radiales a en roseta, que se caracteriza por una o más excavaciones c...
Conference Paper
Full-text available
Reconocida por ser portadora de una gran variedad de trazas fósiles, la Formación Balcarce (Ordovícico–Silúrico) está compuesta por cuarcitas de origen marino. Sus rocas afloran en las serranías del Sistema de Tandilia, en el sudeste de la provincia de Buenos Aires. Además, están presentes en los bloques—obtenidos mediante la actividad minera local...
Article
Trilobites, key components of early Palaeozoic communities, are considered to have been invariably fully marine. Through the integration of ichnological, palaeobiological, and sedimentological datasets within a sequence-stratigraphical framework, we challenge this assumption. Here, we report uncontroversial trace and body fossil evidence of their p...
Article
Full-text available
The western Gondwana margin underwent a complex geodynamic history during the early Paleozoic, and major uncertainties remain as to the role of tectonism in sedimentary dynamics. This study focuses on the lower part Santa Rosita Formation and the coeval Guayoc Chico Group (Cordillera Oriental; Northwest Argentina), ranging from the late Cambrian (F...
Poster
Full-text available
El atractivo por las Ciencias de la Tierra en la sociedad se mantiene presente, aunque la información disponible es, en general, muy técnica o enfocada a otras regiones del planeta. Cicterránea surge para compartir los conocimientos generados en el Centro de Investigaciones en Ciencias de la Tierra (CICTERRA, CONICET, FCEFyN-UNC). Su objetivo es ap...
Article
Although environmental variability generates differences in the preservation of shell assemblages, intrinsic variations in shell characteristics can confound the effects of environment on preservation. However, several studies proposed that the composition of shell supply only affects the intensity of alteration but not its preservation trend along...
Conference Paper
Full-text available
Occupation of shallow environments by rhynchonelliform brachiopods is rare during the Lower Ordovician. However, in the NW Argentina basin thgroup, especially Tarfaya purmamarcaensis Benedetto, occupied high-energy environments as early as the Tremadocian. This species forms up to 15 cm thick monospecific concentrations in shoreface and offshore tr...
Poster
Full-text available
The detailed paleontological sampling of the Acoite Formation, carried out at La Ciénaga de Purmamarca area, allowed to obtain a variety of graptolites among which we can highlight Kiaerograptus kiaeri Monsen, recorded for the first time in this section. The taxonomic study confirmed the occurrence of Paratetragraptus approximatus Nicholson in the...
Poster
Full-text available
Molluscan faunas are the most common macrofossils recorded in Late Quaternary raised marine deposits from the Canadian High Arctic (Dyke et al., 1996). However, little is known about predator-prey interactions (Aitken & Risk, 1988) since molluscan predators are rarely preserved in raised marine sediments from Axel Heiberg Island (AHI, Canadian High...
Poster
Full-text available
Late Quaternary fossil molluscan assemblages are abundant in raised glaciomarine sediments in the Canadian High Arctic (Dyke et al., 1996). It is possible to recognize different kinds of sedimentary environments according to shell preservation patterns that define taphofacies (Kidwell and Flessa, 1996; Behrensmeyer et al., 2000; Zuschin et al., 200...
Article
The Patagonian Continental Shelf (PCS) is a dynamic region characterized by the confluence of two western boundary currents (the Brazil and Malvinas currents) and the presence of several oceanographic fronts, giving rise to a large and rich biological area. In this study we analyze the distribution pattern of brachiopod assemblages along a latitudi...
Conference Paper
Full-text available
The Furongian–Floian interval represents a key evolutionary transition with the onset of the Great Ordovician Biodiversification Event (GOBE), soon after the Cambrian Explosion. Few Furongian echinoderm faunas are known worldwide, and all of them consist of low diversity assemblages comprising edrioasteroids, eocrinoids, rhombiferans, solutans, and...
Article
The early late Tremadocian (Tr2) interval is exceptionally well represented in eastern areas of the Argentine Cordillera Oriental. New field collections and detailed taxonomic reassessments, as well as a revaluation of regional data, permit the development of a highly resolved trilobite-based biostratigraphic framework. The concept of the tradition...
Conference Paper
Full-text available
New graptolite collections were made in the Jujuy Province, Argentina, related to the Doctoral Thesis of one of the authors (N.C.H.S.). This material (CEGH-UNC24943)wasfound in fair weather shale deposits exposed at the eastern side of the route Tuxa-Los Colorados, in the western flank of the Cordillera Oriental. It is biostratigraphically interest...
Conference Paper
Full-text available
Entre el material fosilífero coleccionado en niveles de areniscas medianas expuestas en el camino de Tuxa-Los Colorados, en la provincia de Jujuy, se destaca un tubario biseriado regularmente preservado (CEGH-UNC24944).Su escaso ensanchamiento y extremo proximal suavemente redondeado, como también la forma geniculada y disposición poco alternante d...
Conference Paper
Full-text available
La Cuenca Andina Central es ampliamente conocida por sus continuos y potentes depósitos cambro-ordovícicos marinos silicoclásticos. En el noroeste de Argentina, algunos afloramientos comprenden secciones completas en donde se registra el inicio del Gran Evento de Biodiversificación del Ordovícico (GOBE por sus siglas en inglés) que abarca desde el...
Article
The Broeggeria assemblage is a peculiar brachiopod association that has been recorded mainly from Tremadocian black shales of Baltoscandia, the Anglo-Welsh Basin, Nova Scotia, South Urals and Kazakhstan. Here, we report a low diversity brachiopod association dominated by Broggeria omaguaca n. sp. from upper Tremadocian open-shelf mudstones of north...
Conference Paper
La asociación de Broeggeria es una fauna de baja diversidad de braquiópodos linguloideos dominada por Broeggeria Walcott, 1902, ampliamente representada en facies de pelitas negras disóxicas del Tremadociano de Baltoscandia, Gran Bretaña, este de Canadá y Kazakhstan. En el noroeste de Argentina ha sido identificada en la parte inferior de la Formac...
Conference Paper
Full-text available
Durante los últimos 40 años se han realizado numerosos análisis de la distribución paleogeográfica de los braquiópodos ordovícicos, especialmente de los rinconeliformes. En trabajos recientes se han reconocido para Tremadociano tres provincias faunísticas: Bajas Latitudes, Báltica y Altas Latitudes. En el presente estudio se reevalúan las afinidade...
Article
The re-study of species previously attributed to the genus Nanorthis from the Tremadocian of north-western Argentina has led to the recognition of the new genera Gondwanorthis (type species Nanorthis calderensis Benedetto), to which the Iranian species Nanorthis bastamensis Ghobadi Pour, Kebriaee-Zadeh & Popov is also referred, and Lampazarorthis (...
Article
New graptolite-trilobite records provide relevant information for the biostratigraphic framework of the Lower Paleozoic in western Gondwana. Aorograptus victoriae (T. S. Hall), together with Adelogratus cf. A. altus Williams and Stevens and Ancoragraptus bulmani (Spjeldnaes) are described for the first time in the Santa Victoria area. These species...
Article
Full-text available
The new obolid Torobolus subplanus gen. et sp. nov. from the lower Tremadocian Devendeus Formation, and the the new species Libecoviella tilcarensis and Leptembolon argentinum from the upper Tremadocian Santa Rosita Formation are described and illustrated. Libecoviella is typical of the upper Tremadocian Třenice Formation and Floian Klabava Formati...
Conference Paper
Full-text available
Several previous studies have underscored the importance of how intrinsic variations in shell characteristics affect the final taphonomic attributes of shell deposits. Other studies have shown that the composition of shell supply only affects the intensity of each attribute but not its rank-order. Although these are promising results for taphofacie...
Conference Paper
Full-text available
Although linguliform brachiopods are a common component in the thick and continuous Upper Cambrian-Ordovician clastic successions of northwestern Argentina and Bolivia, to date they remain almost unknown. A few species from the Eastern Cordillera (Cordillera Oriental) were described and illustrated by H. J. Harrington more than eighty years ago and...
Conference Paper
Full-text available
El género Lipanorthis fue descripto originalmente de la Formación Floresta en las Sierras Subandinas - de donde proviene la especie tipo L. santalaurae Benedetto- y de la región de Purmamarca (L. andinus Benedetto). Con posterioridad se reportaron ejemplares muy bien preservados en la Formación Saladillo (región de Pascha, Quebrada Incamayo) en los...
Conference Paper
Full-text available
Nanorthis purmamarcaensis Benedetto es un plectortoideo muy abundante en las sucesiones tremadocianas del noroeste de Argentina. El material estudiado procede de niveles de la Formación Santa Rosita en la quebrada Humacha (quebrada de Humahuaca), de edad tremadociana media. Algunos horizontes contienen numerosas valvas dorsales y ventrales en difer...
Conference Paper
Full-text available
En afloramientos de la Formación de Santa Rosita son bien conocidas las concentraciones fosilíferas dominadas por el braquiópodo Nanorthis, frecuentes hacia el tope de ciclos arenosos grano-estrato crecientes de ambientes de shoreface medio. En contraste, Lipanorthis es un taxón poco abundante con registros ocasionales en las áreas de Parcha, Abra...
Conference Paper
Full-text available
Se dan a conocer nuevos registros de concentraciones de rinconeliformes del Miembro Humacha, Formación Santa Rosita (Tremadociano tardío), Cordillera Oriental (Quebrada Humacha, Jujuy). Las mismas están dominadas por el género Nanorthis Ulrich y Cooper, 1936 y predominantemente están asociadas a ambientes de shoreface medio. Invariablemente aparece...
Conference Paper
Full-text available
Se da a conocer el registro de una nueva especie del género Asaphellus Callaway, 1877, que resulta muy particular desde el punto de vista morfológico y provee nueva información para completar la diagnosis del género. La misma procede de los tramos inferiores del Miembro Rupasca de la Formación Santa Rosita (Tremadociano medio, TR2) expuesto en la Q...
Conference Paper
Full-text available
La taxonomía de la Familia Asaphidae Burmeister, 1843 ha sido históricamente problemática, sin embargo, su exhaustivo estudio sistemático resulta de gran importancia dado su abundancia en el Ordovícico Temprano de la Cordillera Oriental argentina. Un estudio preliminar en los miembros Rupasca (Tremadociano medio) y Humacha (Tremadociano superior te...
Conference Paper
Las concentraciones monotáxicas formadas exclusivamente por braquiópodos linguliformes son un rasgo frecuente en sucesiones silicoclásticas del Paleozoico inferior en distintas regiones peri-gondwanicas. Han sido documentadas ampliamente en el Darriwiliano de los macizos Armoricano y Hesperiano (Emig y Gutiérrez–Marco, 1997), Ordovícico superior de...

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Projects (4)
Project
Due to the frequent appearance and repeated reports about fossil traces in Southeastern Buenos Aires Province (Mar del Plata and nearby localities), we conduct surveys and evaluations of the risk of paleontological heritage in the region. Besides reporting them to the authorities, we study those novel findings from the taxonomic point of view, emphasizing paleobiological aspects.
Project
Investigate the structure and functioning of Cambro-Ordovician ecosystems, quantifying the trends in the occupation of the eco-space over time and its relationship with the diversity trajectories of different fossil groups
Project
This project aims to unravel the paleoenvironmental conditions of the Santa Rosita Formation (SRF; late Cambrian; Furongian Stage 10 - Early Ordovician; Tremadocian) and its stratigraphic equivalents. Outcropping widely in the Cordillera Oriental (North-West Argentina; NWA), the SRF will be studied using a sedimentological approach. This sedimentary succession has yielded for decades thousands of fossils (e.g trilobites, brachiopods, bivalves, ostracodes, graptolites) and also exceptionally well-preserved fossils (e.g. Apankura machu, Mimetaster florestaensis) dating from the end of the Cambrian Explosion and the beginning of the Great Ordovician Biodiversification Event. However, very few studies have tried to achieve detailed paleoenvironmental reconstructions. This project aspires to integrate and to detail the different sections outcropping in the NWA (Province of Jujuy and Salta) in order to constrain the evolution of the basin during the Cambrian-Ordovician transition, which corresponds to a retro-arc foreland basin.