Publications

Export 19 results:
Sort by: [ Author  (Desc)] Title Type Year
A B C D E F G H [I] J K L M N O P Q R S T U V W X Y Z   [Show ALL]
T
Tschopp, E., Mateus O., Marzola M., & Norell M. (2018).  Indications for a horny beak and extensive supraorbital connective tissue in diplodocid sauropods. Annual Meeting of the Society of Vertebrate Paleontology. 229.: Society of Vertebrate Paleontologytschopp_et_al_2018_svp_abstract.pdf
S
Sander, M., Laven T., Mateus O., & Knotschke N. (2004).  Insular dwarfism in a brachiosaurid sauropod from the Upper Jurassic of Germany. Journal of Vertebrate Paleontology. 23, 108., Number Suppl. to 3 Abstract
n/a
Sander, M., Laven T., Mateus O., & Knotschke N. (2004).  Insular dwarfism in a brachiosaurid sauropod from the Upper Jurassic of Germany. Journal of Vertebrate Paleontology. 23, 108–108., Number Suppl. to Abstract
n/a
R
Rotatori, F. M., Moreno-Azanza M., & Mateus O. (2018).  Isolated dryosaurid (Dinosauria: Ornithopoda) cranial remains from the Late Jurassic of Portugal. EJIP Life finds a way. 95-98., Gasteiz, Spainrotatori_et_al_2018_ejip.pdf
P
Puértolas-Pascual, E., Mateus O., & Callapez P. M. (2018).  Implicaciones de la fenestra mandibular externa en el origen de Crocodylia. EJIP Life finds a way. 14-144., Gasteiz, Spainpuertolas-pascual_et_al_2018_ejip.pdf
M
Mateus, O., & Milan J. (2005).  Ichnological evidence for giant ornithopod dinosaurs in the Late Jurassic Lourinhã Formation, Portugal. Abstract Book of the International Symposium on Dinosaurs and Other Vertebrates Palaeoichnology. 60., Fumanya, Barcelona Abstract
n/a
Mateus, O., & Milan J. (2005).  Ichnological evidence for giant ornithopod dinosaurs in the Late Jurassic Lourinhã Formation, Portugal. Abstract Book of the International Symposium on Dinosaurs and Other Vertebrates Palaeoichnology. 60–60., Fumanya, Barcelona Abstract
n/a
Mateus, O., & Milan J. (2008).  Ichnological evidence for giant ornithopod dinosaurs in the Upper Jurassic Lourinhã Formation, Portugal. Oryctos. 8, 47-52. Abstractmateus_and_milan_2008_ichnological_evidence_for_giant_ornithopod_big_ornithopod_track_from_u_j_lourinha_fm_portugal.pdfWebsite

The Upper Jurassic Lourinhã Formation (Lusitanian Basin, Portugal) contains a diverse dinosaur fauna comprising theropods, sauropods, stegosaurs, ankylosaurs and several genera of ornithopods. The sedimentology in the area favours preservation of tracksways, and tracks from most of the dinosaurs are also represented by skeletal remains. During fieldwork in the summer of 2003 a new, large, tridactyl track was found at the beach of Vale Frades, approximately 6 km north of Lourinhã (central west Portugal). The track was found together with a stegosaur track on a clay bed exposed within the intertidal zone. Due to the immediate danger of erosion, the track was collected and is now on display at Museu da Lourinhã. The track is 70 cm long and 69 cm wide, the toes are short and broad, with indications of short blunt claws, and there is a high angle of divarication between the outer digits. The shape and dimensions of the track identifies it as deriving from an ornithopod dinosaur with an estimated hip height around three metres. Although very large ornithopods are known from the Cretaceous, the largest known Jurassic ornithopod is Camptosaurus from North America, and the largest known from Portugal is the camptosaurid Draconyx loureiroi. Neither of these reached the body size suggested by the new track. So far the track described herein is the only evidence for a Jurassic ornithopod of that size.

Mateus, O., & Milan J. (2005).  Ichnological evidence for giant ornithopod dinosaurs in the Late Jurassic Lourinhã Formation, Portugal.. Abstract Book of the International Symposium on Dinosaurs and Other Vertebrates Palaeoichnology. 60., Fumanya, Barcelona Abstractmateus__milan_2005_footprint.pdf

The Late Jurassic Lourinhã Formation contains a diverse dinosaur fauna comprising theropods, sauropods, stegosaurs, ankylosaurs and several genera of ornithopods.
The sedimentology in the area favours preservation of footprints, and footprints from most of the dinosaurs represented by skeletal remains are present in the area. During fieldwork in the summer of 2003 a new, large, tridactyl footprint was found at the beach of Vale Frades, approximately 6 km north of Lourinhã, Portugal. The footprint was found together with a stegosaur footprint on a clay bed exposed within the tidal zone. The footprints were preserved as sandstone casts standing on a pedestal of clay. This unusual type of preservation is the result of the footprints having first been emplaced in clay, and then filled with sand. During the present day erosion from the sea, the harder sandstone cast of the footprints protects the subjacent clay layers from erosion. Owing to the immediate danger of erosion of, the footprint was collected and is now on display at Museu da Lourinhã (ML 1000). The footprint is 70 cm long and 69 cm wide, the toes are short and broad, with indications of short blunt claws. The

divarication angle between the outer digits is close to 90 degrees. The dimensions and general

morphology of the footprint identifies it as deriving from an ornithopod dinosaur with an estimated hip height of 4.13 metres. Although very large ornithopods are known from the Cretaceous, the largest known Jurassic ornithopod is Camptosaurus from USA, and the largest known from Portugal is the camptosaurid Draconyx loureiroi. Neither of these reached the body size suggested by the new footprint. So far the footprint described herein is s the only evidence for a Jurassic ornithopod of that size.

Marzola, M., Russo J., & Mateus O. (2015).  Identification and comparison of modern and fossil crocodilian eggs and eggshell structures. Historical Biology. 27(1), 115-133. Abstractmarzola_et_al_2015_identification_and_comparison_of_modern_and_fossil_crocodilian_eggs_and_eggshell_structures.pdfWebsite

Eggshells from the three extant crocodilian species Crocodylus mindorensis (Philippine Crocodile), Paleosuchus palpebrosus (Cuvier's Smooth-fronted Caiman or Musky Caiman) and Alligator mississippiensis (American Alligator or Common Alligator) were prepared for thin section and scanning electron microscope analyses and are described in order to improve the knowledge on crocodilian eggs anatomy and microstructure, and to find new apomorphies that can be used for identification. Both extant and fossil crocodilian eggs present an ornamentation that vary as anastomo-, ramo- or the here newly described rugosocavate type. The angusticaniculate pore system is a shared character for Crocodylomorpha eggshells and some dinosaurian and avian groups. Previously reported signs of incubated crocodilian eggs were found also on our only fertilised and hatched egg. Paleosuchus palpebrosus presents unique organization and morphology of the three eggshell layers, with a relatively thin middle layer characterised by dense and compact tabular microstructure.

Marzola, M., Russo J., & Mateus O. (2015).  Identification and comparison of modern and fossil crocodilian eggs and eggshell structures. Historical Biology. 27, 115-133., Number 1 Abstract
n/a
L
authors listed, N. (2009).  International Conference on the Geological Collections and Museums: mission and management.. (Brandao J, Callapez P, Mateus O, Castro P, Ed.). , Jan: Journal of Paleontological Techniques 5 (special volume) Abstract
n/a
J
Jacinto, J. J., & Mateus O. (2002).  Integration of the distribution of Hemidactylus turcicus and Tarentola mauritanica in Portugal Continental in a G.I.S. and some occasional observations. Livro de resumos do VII Congresso Luso-espanhol (XI Congreso Español de Herpetologia. 127., Évora, Portugal: Sociedade Portuguesa de Herpetologia & Associacion Herpetologica Española Abstract

n/a

Jacinto, J. J., & Mateus O. (2002).  Integration of the distribution of Hemidactylus turcicus and Tarentola mauritanica in Portugal Continental in a G.I.S. and some occasional observations. (Sociedade Portuguesa de, Herpetologia, Ed.).Livro de resumos do VII Congresso Luso-espanhol (XI Congreso Español) de Herpetologia. 127., Évora, Portugal Abstract
n/a
Jacinto, J. J., & Mateus O. (2002).  Integration of the distribution of Hemidactylus turcicus and Tarentola mauritanica in Portugal Continental in a G.I.S. and some occasional observations. Livro de resumos do VII Congresso Luso-espanhol (XI Congreso Español) de Herpetologia. 127–127., Évora, Portugal Abstract
n/a
G
B
Beccari, V., Mateus O., Wings O., Milàn J., & Clemmensen L. B. (2021).  Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland. Diversity. 13, , Number 11 Abstractdiversity-13-00561-v2.pdfWebsite

The Late Triassic (Norian) outcrops of the Malmros Klint Formation, Jameson Land (Greenland) have yielded numerous specimens of non-sauropod sauropodomorphs. Relevant fossils were briefly reported in 1994 and were assigned to Plateosaurus trossingensis. However, continuous new findings of early non-sauropod sauropodomorphs around the globe facilitate comparisons and allow us to now revise this material. Here, the non-sauropod sauropodomorph Issi saaneq gen. et sp. nov. is described based on two almost complete and articulated skulls. The two skulls represent a middle-stage juvenile and a late-stage juvenile or subadult. Issi saaneq differs from all other sauropodomorphs by several unique traits: (1) a small foramen at the medial surface of the premaxilla; (2) an anteroposteriorly elongated dorsoposterior process of the squamosal; (3) a relatively high quadrate relative to rostrum height; (4) a well-developed posterodorsal process of the articular. These features cannot be explained by taphonomy, ontogeny, or intraspecific variation. Issi saaneq shows affinities to Brazilian plateosaurids and the European Plateosaurus, being recovered as the sister clade of the latter in our phylogenetic analysis. It is the northernmost record of a Late Triassic sauropodomorph, and a new dinosaur species erected for Greenland. Issi saaneq broadens our knowledge about the evolution of plateosaurid sauropodomorphs.