Matias Motta

Matias Motta
Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" · Laboratorio de Anatomía Comparada y Evolución de los Vertebrados

About

26
Publications
22,221
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
214
Citations
Citations since 2016
21 Research Items
212 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060

Publications

Publications (26)
Article
The Greater Rhea (Rhea americana, Rheidae) is a flightless paleognath with a wide geographical distribution in South America. The morphology of its shoulder girdle and wings are different from those of flying birds and some characteristics are similar to basal birds and paravian theropods. We present a detailed osteological, myological, and functio...
Article
Full-text available
Megaraptora is a theropod clade known from former Gondwana landmasses and Asia. Most members of the clade are known from the Early to Late Cretaceous (Barremian–Santonian), with Maastrichtian megaraptorans known only from isolated and poorly informative remains. The aim of the present contribution is to describe a partial skeleton of a megaraptorid...
Article
The deposits of the Chorrillo Formation (Maastrichtian) were accumulated during a ‘continental window’ that occurred during the Late Cretaceous in the Austral-Magallanes foreland basin, southern Patagonia, Argentina. The aim of the present contribution is to describe the depositional conditions as well as new vertebrate and plant fossils from this...
Preprint
Full-text available
Megaraptorans are a theropod clade distributed in former Gondwana landmasses and Asia. Most members of the clade are known from early Cretaceous to Turonian times whereas Maastrichtian megaraptorans are known just from isolated and poorly informative remains. The aim of present contribution is to describe a partial skeleton of a megaraptorid coming...
Article
The record of sauropods in the Upper Cretaceous of Patagonia is rich. However, there are still several blanks on this record. Here it is described a new sauropod assemblage coming from the Salitral Ojo de Agua Area, Río Negro province, northern Patagonia, Argentina (Allen Formation; Maastrichtian). Remains of indeterminate saltasaurines, aeolosauri...
Article
Full-text available
In 1976 John Ostrom published an enlightening paper about the anatomical transformations in the shoulder girdle and forelimb elements along the origin of birds. Most of his ideas were based on comparing Archaeopteryx lithographica with the extant New World vulture Cathartes aura. Ostrom offered innovative ideas about range of movements and function...
Article
Full-text available
Unenlagia comahuensis was originally described as a phylogenetic link between nonavian dinosaurs and birds. Later it was interpreted by some authors as belonging to the deinonychosaurian clade Dromaeosauridae, and more recently as phylogenetically closer to birds than to dromaeosaurids. The only known specimen is represented by an incomplete skelet...
Article
Abelisaurid theropods are well known in Cretaceous beds along South America, particularly Patagonia. However, the record of latest Cretaceous abelisauroids is still far from satisfactory. Until recently, few taxa were described from Maastrichtian beds: Carnotaurus sastrei and Quilmesaurus curriei, but also perhaps Abelisaurus comahuensis. In this c...
Article
Full-text available
The fossil record of basal paravians in Gondwana is still poorly known, being limited to the Cretaceous unenlagiids from South America and the problematic Rahonavis from Madagascar. Here we report on a new paravian from the Cenomanian-Turonian (Late Cretaceous) of Río Negro province, NW Patagonia, Argentina. The new taxon exhibits a derived bird-li...
Article
Full-text available
Barn Owls (Tytonidae) are nocturnal raptors with the largest geographical distribution among Strigiformes. Several osteological, morphometrical, and biomechanical studies of this species were performed by previous authors. Nevertheless, the myology of forelimb and tail of the Barn Owls is virtually unknown. This study is the first detailed myologic...
Article
Full-text available
The first fossil remains of vertebrates, invertebrates, plants and palynomorphs of the Chorrillo Formation (Austral Basin), about 30km to the SW of the town of El Calafate (Province of Santa Cruz), are described. Fossils include the elasmarian (basal Iguanodontia) Isasicursor santacrucensis gen. et sp. nov., the large titanosaur Nullotitan glaciari...
Conference Paper
Full-text available
En aves voladoras actuales el músculo supracoracoides recorre hacia arriba la cara anteromedial del coracoides, rodea al proceso acrocoracoidal y atraviesa el foramen trióseo para finalmente insertarse sobre la cara dorsal del húmero. Su función es clave en la elevación del ala y la rotación longitudinal del húmero. John Ostrom describió la condici...
Article
Full-text available
Recent years witnessed the discovery of a great diversity of early birds as well as closely related non-avian theropods, which modified previous conceptions about the origin of birds and their flight. We here present a review of the taxonomic composition and main anatomical characteristics of those theropod families closely related with early birds...
Article
Tail anatomy of unenlagiids is nearly unknown. The aim of the present contribution is to describe in detail the tail of the unenlagiid Buitreraptor gonzalezorum, and to compare it with Archaeopteryx and other paravians. A detailed specimen overview yielded a large number of similarities between Archaeopteryx and Buitreraptor, including long postzyg...
Article
Full-text available
The present contribution describes theropod remains coming from the Huincul Formation (Neuquén Group; Cenomanian-Turonian; Upper Cretaceous) at a single locality located in northwestern Río Negro province, Patagonia, Argentina. This theropod association is composed of abelisauroids, two different-sized carcharodontosaurid allosauroids, a coelurosau...
Article
Full-text available
TALAMPAYA NATIONAL PARK, PROVINCE OF LA RIOJA, ARGENTINA. In this paper disclosed two new records of Crowned Eagle (Buteogallus coronatus) for the Talampaya National Park, La Rioja Province. The first record for the month of May 2013 consists of a pair of adult individuals, with a chick and the second in October 2014 of an adult and a nest. These r...
Conference Paper
Dentro de Sudamérica uno de los grupos de dinosaurios mejor representados es el de los terópodos. Dentro del continente, Patagonia posee uno de los registros más ricos de este grupo, tanto en abundancia como en diversidad. La nueva localidad se encuentra al noroeste de la provincia de Rio negro, Argentina, y cuenta con afloramientos de la Formación...
Conference Paper
Dentro de las escasas especies de ornitisquios registradas para Gondwana, Ornithopoda es el clado mejor conocido. En Patagonia y Antártida muchos de los representantes basales de este clado muestran características anatómicas en común, que sugieren su pertenencia a un clado monofilético. Talenkauen santacrucensis es un taxón representado por uno de...
Conference Paper
En la siguiente presentación se dan a conocer datos adicionales acerca de un nuevo dinosaurio Iguanodontia. Los materiales aquí descriptos (MACN Pv-19777) consisten en un ejemplar compuesto por un miembro posterior izquierdo parcialmente conservado. Dichos materiales proceden de la Isla James Ross de la Antártida Argentina, y fueron recuperados en...

Network

Cited By

Projects

Projects (2)
Project
The aim of this project is to document the anatomy and evolution of South American Paravian fossil record, mostly represented by unenlagiids. The phylogenetical relationships of these theropods are far from being understood. In this way detailed anatomical studies of their members could help clarify their relationships among paravians.
Project
Exploration of different Triassic, Jurassic and Cretaceous fossil localities in Argentina. Chile and Perú, searching for dinosaurs in particular and other Mesozoic vertebrates.