Claudia P Tambussi

Claudia P Tambussi
National Scientific and Technical Research Council | conicet · CICTERRA - Centro de Investigaciones en Ciencias de la Tierra

Dr. Ciencias Naturales

About

138
Publications
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2,511
Citations
Citations since 2017
25 Research Items
907 Citations
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2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
Introduction
My background is in biology and paleontology and my interests’ center on avian paleobiology. My research covers a relatively broad approach to systematics, phylogeny, paleobiology including functional morphology, morphometric geometry, biomecanics and paleoneurology in fossil birds from South America and Antarctica. I have also deeply interest in inquiry-based approaches to science education, exhibition development and design, and the history and nature of science.

Publications

Publications (138)
Chapter
Brain morphology has become a key element to predict a wide array of cognitive and behavioral, sensory and motor abilities, and to determine evolutionary rates of phenotypic transformation. Our information on early bird brain morphology comes of natural endocasts or studies of the intracranial cavity. Although the first studies of fossil bird brain...
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To study the hindlimb connectivity patterns of aquatic birds, we compared the musculoskeletal multi-networks of non-divers (Numididae and Anatidae), wing-propelled divers (Alcidae and Sphenicidae), and foot-propelled divers (Anhingidae, Phalacrocoracidae, Podicipedidae, and Gaviidae). Anatomical multi-networks are undirected multigraphs where bones...
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To study morphological evolution, it is necessary to combine information from multiple intersecting research fields. Here, we report on the structure of the bony and muscular elements of the craniomandibular complex of birds, highlighting its morphological architecture and complexity (or simplification) in the context of anatomical networks of the...
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en Few investigators have examined in vivo bite-force of birds, likely due, at least in part, to the difficulty in accessing suitable force transducers. We describe a low-cost, easy-to-build, and portable force transducer with the goal of encouraging ornithologists to improve our knowledge of in vivo bite forces of birds. We used a commercial piezo...
Article
We describe a new species of a large buzzard (Accipitridae), Buteo dondasi sp. nov. from the late Pliocene of Buenos Aires Province, Argentina represented by an incomplete left hind limb, including a distal fragment of tibiotarsus, tarsometatarsus, fragment of os metatarsale I, and toes I and II. The new taxon exhibits characteristics of the crown...
Article
The fossil bird Dryornis pampeanus Moreno & Mercerat, is reinterpreted after examination of new referred material (humerus, coracoid, fragments of ulna, radius, scapula, sternum and tibiotarsus) from the Pliocene Chapadmalal Formation of Argentina. The current diagnosis is emended in the light of important considerations that cast doubt on the prev...
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Dos restos aislados de aves fororracoideas fueron recientemente exhumados de los sedimentos de la Formación Sarmiento de edad Mustersense (Eoceno Superior) en la localidad fosilífera de Gran Hondonada en la provincia de Chubut, Argentina. Ambos restos, una falange ungueal del segundo dígito izquierdo (MEF PV-1721) y un tarsometatarso derecho sin su...
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We analyze the connectivity patterns and fusion events among bones leading to the adult skeletal organization during the development of the superaltricial monk parakeet (Myiopsitta monachus, Psittaciformes), providing insights about the functional and evolutionary significance in the avian structural design. By using whole mount specimens stained f...
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We used three‐dimensional digital models to investigate the brain and endosseous labyrinth morphology of selected Neotropical Piciformes (Picidae, Ramphastidae, Galbulidae and Bucconidae). Remarkably, the brain morphology of Galbulidae clearly separates from species of other families. The eminentiae sagittales of Galbulidae and Bucconidae (insectiv...
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Aves, Spheniscidae) en Coquimbo (Mio-ceno Medio-Plioceno Tardío), Chile, y su vinculación con las corrientes oceánicas. [Penguins (Aves, Sphenisci-dae) in Coquimbo (Middle Miocene-Late Pliocene), Chile, and their relationship with the Ocean currents.] Re-vista Española de Paleontología, 21 (2), 115-121. ISSN 0213-6937. ABSTRACT Two remains of pengu...
Article
The tarsometatarsus conformation and foot types in birds are unique traits within vertebrates. We investigate how the tarsometatarsus and the zygodactyl foot are formed during development in the monk parakeet (Myiopsitta monachus). Using bones, whole mount specimens stained for cartilage and bone and histological sections, we focus on the osteology...
Article
The tarsometatarsus conformation and foot types in birds are unique traits within vertebrates. We investigate how the tarsometatarsus and the zygodactyl foot are formed during development in the monk parakeet (Myiopsitta monachus). Using bones, whole mount specimens stained for cartilage and bone, and histological sections, we focus on the osteolog...
Article
We describe new avian remains from the lower levels of the Toro Negro Formation (~7-6 Ma, U–Pb), exposed in Quebrada de la Troya between Vinchina and Jagüé towns in La Rioja Province, Argentina. The Toro Negro Formation is composed of a thick continental sequence (~2.4 km) of sandstones, conglomerates and mudstones deposited in both fluvial and lac...
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Waterfowl (Aves, Anseriformes) constitute an ancient global radiation, and understanding the pattern and timing of their evolution requires a well-corroborated phylogeny including extant species and fossils. Following the molecular advances in avian systematics, however, morphology has often been held as misleading, yet congruence with molecular da...
Article
Relative brain sizes in birds can rival those of primates, but large-scale patterns and drivers of avian brain evolution remain elusive. Here, we explore the evolution of the fundamental brain-body scaling relationship across the origin and evolution of birds. Using a comprehensive dataset sampling> 2,000 modern birds, fossil birds, and theropod di...
Article
A new Anseriformes, Conflicto antarcticus gen. et sp. nov., represented by associated bones of a single individual, from the early Palaeocene of Antarctica is described. The new taxon is unlike any other known member of the order. Conflicto antarcticus is a medium-sized (2 kg) stem anseriform. The forelimb and pectoral girdle bones suggest that it...
Article
A new Anseriformes, Conflicto antarcticus gen. et sp. nov., represented by associated bones of a single individual, from the early Palaeocene of Antarctica is described. The new taxon is unlike any other known member of the order. Conflicto antarcticus is a medium-sized (2 kg) stem anseriform. The forelimb and pectoral girdle bones suggest that it...
Article
Here we address the morphology of the cranial musculoskeletal in the South American Band-winged nightjar (Systellura longirostris, Caprimulgiformes, Aves) with the focus upon in how the mouth closure and opening mechanism is. Bony characters such as the thinness of the interorbital septum and the reduction of the postorbital process co-assist the l...
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Globuli ossei are subspherical structures of endochondral origin that are inserted in the hypertrophic cartilage of long bones, and are related to paedomorphic phenomena. These structures are here described for the first time in Aves, concretely in a postcranial bone of an extinct Spheniciformes from Antarctica (Delphinornis arctowskii). Although i...
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Madrynornis mirandus, one of the few fossil penguins known from a nearly complete articulated skeleton, represents a key taxon for understanding the stem-crown transition in penguins. Despite the wealth of morphological character data preserved in the holotype specimen, the phylogenetic placement of this early late Miocene taxon has remained contro...
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The cranio-mandibular complex is an important structure involved in food capture and processing. Its morphology is related to the nature of the food item. Jaw muscles enable the motion of this complex and their study is essential for functional and evolutionary analysis. The present study compares available behavioral and dietary data obtained from...
Article
The ossification sequence of Myiopsitta monachus was determined. Myiopsitta has a similar sequence to other altricial birds, with lower levels and delayed ossification compared to precocial species. The hindlimbs ossify before the forelimbs, a condition that could be linked to altriciality. To determine the stability of the sequences of ossificatio...
Article
Psittaciformes have apomorphies in the muscles of the jaw that include both the adductors m. ethmomandibularis (EM) and m. pseudomasseter (PM), which are equally responsible for the generation of strong bite forces. While the EM is present in all Psittaciformes, the PM can be absent or present, and even under-developed or well-developed. The aim of...
Chapter
Se denomina complejo cráneo-mandibular (CCM) al conjunto de estructuras óseas, musculares y nerviosas que ejerce funciones tales como protección (del encéfalo, los órganos sensoriales y de la porción anterior del tracto digestivo y respiratorio) o de conducta (alimentación, construcción de nidos, acicalamiento, defensa, actividades sociales). El cr...
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La visualización y análisis de los organismos asistido por computadoras ha revolucionado el estudio de los mismos tanto vivientes como fósiles. Técnicas novedosas permiten caracterizar los restos en tres dimensiones y acceder a detalles sin precedentes. Esto ha permitido ganar importantes conocimientos sobre la anatomía, el desarrollo, la función y...
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ABSTRACT — Pseudoseisuropsis wintu sp. nov. is described from cranial material that had formerly been designated as a paratype of the extinct Pseudoseisuropsis nehuen. Thorough comparisons were made between the cranial specimens ascribed to Pseudoseisuropsis and many extant furnariid species. This new species is lower Pleistocene in age and increas...
Article
Penguins have a more than 60 million year long evolutionary history. Thus, stem lineage fossil taxa are key to understanding their evolution. Here, we present data on three virtual endocasts from stem penguin skulls collected from the Eocene La Meseta Formation of Seymour Island (Antarctica), along with comparative data from extant penguins and out...
Article
Knowledge about the embryonic stages of birds is important in answering many questions about development and evolution. We give the first description of 41 embryological stages of the monk parakeet (Myiopsitta monachus) on the basis of external morphology and comparison with the chicken. We also provide measurements of some external morphological c...
Article
Psittaciform birds exhibit novelties in jaw bone structure and musculature that are associated with strong bite forces. These features include an ossified arcus suborbitalis and the muscles ethmomandibularis and pseudomasseter. We analyse the jaw musculature of the monk parakeet (Myiopsitta monachus) to enable future studies aimed at understanding...
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Many studies on avian microanatomy have established a relationship between high bone compactness (i.e., considerable degree of osteosclerosis) and diving behavior. Greatest degrees of compactness have been observed in the femora and humeri of fossil and extant penguins, femora of Hesperornis Marsh, and Polarornis gregorii Chatterjee, and to a somew...
Article
Psittaciformes are a very diverse group of non-passerine birds, with advanced cognitive abilities and highly developed locomotor and feeding behaviours. Using computed tomography and three-dimensional (3D) visualization software, the endocasts of 14 extant Neotropical parrots were reconstructed, with the aim of analysing, comparing and exploring th...
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Terror birds constitute the most outstanding group of the South American Cenozoic avifauna. Considered as apex predators, their hunting skills have recently been examined, but their diversity is still unresolved. Here we report a new terror bird from the late Pliocene of Argentina, represented by the most complete articulated skeleton of one yet fo...
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Visualization and analysis of fossils assisted by computers have revolutionized the study of extinct organisms. Innovative techniques allow to characterize the remains in three dimensions with unprecedented detail, allowing paleontologists to gain important knowledge about anatomy, development, function and even conservation. Digital reconstruction...
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Visualization and analysis of fossils assisted by computers have revolutionized the study of extinct organisms. Innovative techniques allow to characterize the remains in three dimensions with unprecedented detail, allowing paleontologists to gain important knowledge about anatomy, development, function and even conservation. Digital reconstruction...
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The aim of this contribution is to verify the presence of the suborbital arch and the ethmomandibularis and pseudomasseter muscles in the holotype of Nandayus vorohuensis (Tonni and Noriega, 1996) in order to gain a better understanding of the capabilities of its cranio-mandibular complex and provide new tools for the discussion on the evolution of...
Article
We studied the hindlimb myology of the monk parakeet (Myiopsitta monachus). Like all parrots, it has zygodactyl feet enabling perching, climbing, hanging, moving easily among trees, and handling food. Muscles were described and weighed, and physiological cross-sectional area (PCSA) of four flexors and one extensor was calculated. In comparison to o...
Article
Full-text available
We studied the hindlimb myology of the monk parakeet (Myiopsitta monachus). Like all parrots, it has zygodactyl feet enabling perching, climbing, hanging, moving easily among trees, and handling food. Muscles were described and weighed, and physiological cross-sectional area (PCSA) of four flexors and one extensor was calculated. In comparison to o...
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Full-text available
Eight adult tarsometatarsi belonging to eight fossil species (Palaeeudyptes gunnari, Palaeeudyptes klekowskii, Anthropornis grandis, Anthropornis nordenskjoeldi, Archaeospheniscus wimani, Marambiornis exilis, Delphinornis arctowskii and Delphinornis larseni) collected from the Antarctic A. nordenskjoeldi Biozone (La Meseta Formation, , 34.2 Ma) wer...
Chapter
Full-text available
No science is based on complete information, and paleornithology is not the exception. There are several reasons for these gaps in the knowledge. The avian fossil record is certainly incomplete; bird remains constitute a biased data set, the discovery of fossils is not haphazard, and those found reveal only limited information, usually about skelet...
Chapter
The continental vertebrate collection of the Santa Cruz Formation (Late-early Miocene) is known worldwide by its abundance and diversity. With regard to the bird fossil record, the taxonomical and morphological diversity is also really high. The initial collection was largely made by Carlos Ameghino by the end of the nineteenth century and the rema...
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Several advances have been made on the understanding of the biotic and environmental history of South America and Antarctica including the discovery of additional fossil sites coupled with progress from multidisciplinary analyses encompassing tectonic, isotopic, and radiochemical dating and molecular studies in modern forms. This also changed the k...
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The fossil record of terrestrial vertebrates from the Late Cretaceous of Antarctica is currently composed of non-avian and avian dinosaurs from the marine sediments of the James Ross Basin, Antarctic Peninsula (West Antarctica). Although two dinosaurian formational assemblages (Late Campanian/Early Maastrichtian and Late Maastrichtian) are known, t...
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Middle Cenozolc marine fossil-bearing beds crop out in the Cerro Plataforma (western Chubut Province. Argentina) at about 1,400 m a.s.l. They are located 500 km far from the modern Atlantic coast and only 50 km from the Pacific Ocean. Well preserved penguin bones and a shark tooth were found therein. Invertebrates include corals, bryozoans, abundan...
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The aim of this work is to establish qualitative and quantitative differences and similarities among talons lacking the keratin sheath in diurnal raptors. We set out to find a tool that allows for the determination of toe (I-IV) and hindlimb (left or right) identity. Different methodologies were used, such as classical anatomical descriptions and F...
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Full-text available
Several advances have been made on the understanding of the biotic and environmental history of South America and Antarctica including the discovery of additional fossil sites coupled with progress from multidisciplinary analyses encompassing tectonic, isotopic, and radiochemical dating and molecular studies in modern forms. This also changed the k...
Chapter
Several advances have been made on the understanding of the biotic and environmental history of South America and Antarctica including the discovery of additional fossil sites coupled with progress from multidisciplinary analyses encompassing tectonic, isotopic, and radiochemical dating and molecular studies in modern forms. This also changed the k...
Chapter
Several advances have been made on the understanding of the biotic and environmental history of South America and Antarctica including the discovery of additional fossil sites coupled with progress from multidisciplinary analyses encompassing tectonic, isotopic, and radiochemical dating and molecular studies in modern forms. This also changed the k...
Chapter
Aves remains have been recovered from several continental Cenozoic localities in SSA, mainly in the Pampas and Patagonia in Argentina, Uruguay, and Brazil. We have selected 13 localities because they have the most complete fossil bird associations.
Chapter
It has been suggested that in South American ecosystems during Cenozoic times, carnivorous birds were hegemonic not only over any other trophic avian guild but also over other vertebrate carnivorous groups (Tambussi 2011 and the literature cited therein). To investigate this, we have chosen to dissect the avian fossil record to determine whether th...
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Full-text available
Andalgalornis steulleti from the upper Miocene-lower Pliocene (≈6 million years ago) of Argentina is a medium-sized patagornithine phorusrhacid. It was a member of the predominantly South American radiation of 'terror birds' (Phorusrhacidae) that were apex predators throughout much of the Cenozoic. A previous biomechanical study suggests that the s...
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The aim of this work is to characterize the growth of the hindlimb muscle mass of the Greater Rhea Rhea americana at different postnatal ages. Twentione muscles were dissected and weighed in 22 specimens of various ages (ranging from a month to full adults) to evaluate their proportion in relation to the body mass and their contribution to the exte...
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The oldest known birds from the Cerro Azul Formation are described, including the oldest records for the genera Eudromia and Nothura (Tinamidae), Milvago (Falconidae), Pterocnemia (Rheidae) and an undetermined Tyrannidae. The first remains of Phorusrhacidae for this formation are reported and a specimen previously referred to the giant teratorn Arg...
Article
The aim of this work is to characterize the growth of the hindlimb muscle mass of the Greater Rhea Rhea Americana at different postnatal ages. Twenty- one muscles were dissected and weighed in 22 specimens of various ages (ranging from a month to full adults) to evaluate their proportion in relation to the body mass and their contribution to the ex...
Article
The study of ecomorphology (relationship between morphology, ecology and behavior) and biomechanics (relationship between morphology and function) allows identification of ecomorphs and niche inference. It represents an alternative to classical diversity studies, independent from systematic categories, which allows assessment of ecomorphological as...
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Sauropoda is one of the most diverse and geographically widespread clades of herbivorous dinosaurs, and until now, their remains have now been recovered from all continental landmasses except Antarctica. We report the first record of a sauropod dinosaur from Antarctica, represented by an incomplete caudal vertebra from the Late Cretaceous of James...
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Full-text available
Psilopterus lemoinei, the largest species in this genus, was a small terror bird weighing 8–9 kg, and was a ground bird with functionally tridactyl feet. New remains of this phorusrhacid, including an exceptionally preserved anterior part of a skull recovered from the Patagonian Killik Aike Norte locality (Santa Cruz Formation, late early Miocene),...
Article
Analysing the effect of climatic/environmental changes on bird communities during the South American Cenozoic is quite complicated. Taking into consideration the extremely complex evolution of such environmental conditions and the incomplete and episodic fossil bird record in this part of the continent, any generalization should be considered with...
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A juvenile of Pterocnemia pennata (MACN 14780) from the Bonaerian (early Late Pleistocene) locality of Salto (Salto district), in the north of Buenos Aires Province, Argentina is presented. This is the northernmost record for the species. The specimen consists of the hind limbs and fragments of fore limbs, phalanxes and vertebrae. The aim of this w...
Article
A juvenile of Pterocnemia pennata (MACN 14780) from the Bonaerian (early Late Pleistocene) locality of Salto (Salto district), in the north of Buenos Aires Province, Argentina is presented. This is the northernmost record for the species. The specimen consists of the hind limbs and fragments of fore limbs, phalanxes and vertebrae. The aim of this w...
Article
A juvenile of Pterocnemia pennata (MACN 14780) from the Bonaerian (early Late Pleistocene) locality of Salto (Salto district), in the north of Buenos Aires Province, Argentina is presented. This is the northernmost record for the species. The specimen consists of the hind limbs and fragments of fore limbs, phalanxes and vertebrae. The aim of this w...
Article
Full-text available
Psilopterus lemoinei, the largest species in this genus, was a small terror bird weighing 8–9 kg, and was a ground bird with functionally tridactyl feet. New remains of this phorusrhacid, including an exceptionally preserved anterior part of a skull recovered from the Patagonian Killik Aike Norte locality (Santa Cruz Formation, late early Miocene),...
Article
Tinamidae), Milvago (Falconidae), Pterocnemia (Rheidae) and an undetermined Tyrannidae. The first remains of Phorusrhacidae for this formation are reported and a specimen previously referred to the giant teratorn Argentavis magnificens is reassigned to this family. We outline and update the current knowledge of the groups studied herein. The palaeo...
Article
A new vertebrate faunal assemblage was recently discovered from the uppermost part of the late Miocene Puerto Madryn Formation. These deposits crop out along the southwestern coast of the Península Valdés area near Punta Delgada (Chubut Province, Argentina). The exhumed vertebrate fauna includes a range of fish, bird and mammal taxa, of which the l...
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Full-text available
We examined the external anatomy of the endocast of the Greater Rhea (Rhea americana, Palaeognathae), during 3 main stages of its postnatal life, and compared it with information available on other palaeognathous birds. Series of scans with spiral computed tomographies were obtained from 3 skulls of different ages (chick, juvenile and adult) of R....
Data
Skull of Andalgalornis steulleti (FMNH P1435). Left lateral view (volume rendering of CT scan data) with slice planes (A-B) displaying the hollow beak cavity. (3.96 MB TIF)
Data
Log bite force in birds plotted against log body mass. Passeriforms in blue (dark blue: Estrildidae, sky blue: Fringillidae), Rheidae in green, Accipitridae in red, Cathartidae in rose and Cariamidae in black. See Table S1 for raw data. (3.39 MB TIF)
Data
Bite force and body mass table. (0.07 MB DOC)
Data
Andalgalornis' fossil. (0.03 MB DOC)
Article
Full-text available
The South American phorusrhacid bird radiation comprised at least 18 species of small to gigantic terrestrial predators for which there are no close modern analogs. Here we perform functional analyses of the skull of the medium-sized (approximately 40 kg) patagornithine phorusrhacid Andalgalornis steulleti (upper Miocene-lower Pliocene, Andalgalá F...
Article
The location of the salt gland in birds can be supra- or infraorbital, leaving generally a mark on the skull. The first type leaves a mark on the frontals, the fossa glandulae nasalis or nasal furrow, placed in the interorbital region. The second type leaves an impressio glandulae nasalis in the antero-ventral side of the frontals. The shape of the...
Article
The location of the salt gland in birds can be supra- or infraorbital, leaving generally a mark on the skull. The first type leaves a mark on the frontals, the fossa glandulae nasalis or nasal furrow, placed in the interorbital region. The second type leaves an impressio glandulae nasalis in the antero-ventral side of the frontals. The shape of the...