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Russo, J., Mateus O., Balbino A., & Marzola M. (2014).  Crocodylomorph eggs and eggshells from the Lourinhã Fm. (Upper Jurassic), Portugal. Comunicações Geológicas. 101, Especial I, 563-566. Abstractrusso_et_al_2014_crocodylomorph_eggs_and_eggshells_from_the_lourinha_fm_upper_jurassic_portugal.pdf

We here present fossil Crocodylomorpha eggshells from the Upper Jurassic Lourinhã Formation of Portugal, recovered from five sites: one nest from Cambelas with 13 eggs, and three partial eggs and various fragments from, Paimogo N (I), Paimogo S (II), Casal da Rola, and Peralta. All specimens but the nest were found in association with dinosaur egg material. Our research reveals that on a micro- and ultrastructural analysis, all samples present the typical characters consistent with crocodiloid eggshell morphotype, such as the shell unit shape, the organization of the eggshell layers, and the triangular blocky extinction observed with crossed nicols. We assign the material from the Lourinhã Formation to the oofamily Krokolithidae, making it the oldest crocodylomorph eggs known so far, as well as the best record for eggs of non- crocodylian crocodylomorphs. Furthermore, our study indicates that the basic structure of crocodiloid eggshells has remained stable since at least the Upper Jurassic.

Russo, J., Mateus O., Balbino A., & Marzola M. (2014).  Crocodylomorph eggs and eggshells from the Lourinhã Fm. (Upper Jurassic), Portugal. Comunica\\c cões Geológicas. 101, Especial I, 563-566. Abstract
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Russo, J., Mateus O., Balbino A., & Marzola M. (2014).  Crocodylomorph eggs and eggshells from the Lourinhã Fm. (Upper Jurassic), Portugal. Comunica\\c cões Geológicas. 101, Especial I, 563-566. Abstract
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Russo, J., Mateus O., Balbino A., & Marzola M. (2014).  Crocodylomorph eggs and eggshells from the Lourinhã Fm. (Upper Jurassic), Portugal. Comunica\\c cões Geológicas. 101, Especial I, 563-566. Abstract

We here present fossil Crocodylomorpha eggshells from the Upper Jurassic Lourinhã Formation of Portugal, recovered from five sites: one nest from Cambelas with 13 eggs, and three partial eggs and various fragments from, Paimogo N (I), Paimogo S (II), Casal da Rola, and Peralta. All specimens but the nest were found in association with dinosaur egg material. Our research reveals that on a micro- and ultrastructural analysis, all samples present the typical characters consistent with crocodiloid eggshell morphotype, such as the shell unit shape, the organization of the eggshell layers, and the triangular blocky extinction observed with crossed nicols. We assign the material from the Lourinhã Formation to the oofamily Krokolithidae, making it the oldest crocodylomorph eggs known so far, as well as the best record for eggs of non- crocodylian crocodylomorphs. Furthermore, our study indicates that the basic structure of crocodiloid eggshells has remained stable since at least the Upper Jurassic.

Gaspar, A., Avelar T., & Mateus O. (2007).  Criacionismo e Sociedade no Séc. XX. (Avelar, T., O. Mateus, Almada, F., Gaspar, A., Ed.).Evolução e Criacionismo: Uma Relação Impossível. 133-160., Lisboa: Quasi ed. gasparavelarmateus2007evoluoecriacio.pdf
Gaspar, A., Avelar T., & Mateus O. (2007).  Criacionismo e Sociedade no Séc. XX.  Evolução e Criacionismo: Uma Relação Impossível. 133-160., Lisboa Abstract
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Jacobs, L., Polcyn M., Mateus O., Schulp A. S., & Neto A. B. (2009).  The Cretaceous Skeleton Coast of Angola. Journal of Vertebrate Paleontology. 29, 121A., Jan Abstractjacobs_et_al_2009cretaceousskeletoncoas.pdfWebsite

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Mateus, O. (2009).  The Cretaceous Skeleton Coast of Angola. Journal of Vertebrate Paleontology. 29, 121A., 1, Number 3: Taylor & Francis Abstract

THE CRETACEOUS SKELETON COAST OF ANGOLA JACOBS, Louis, SMU, Dallas, TX, USA; POLCYN, Michael, SMU, Dallas, TX, USA; MATEUS, Octávio, Museu da Lourinhã, Lourinhã, Portugal; SCHULP, Anne, Natuurhistorisch Museum Maastricht, Maastricht, Netherlands; NETO, André , Universidade Agostinho Neto, Luanda, Angola Cretaceous coastal sediments of Angola present a rich and diverse fauna of marine amniotes, including turtles, mosasaurs, and plesiosaurs. The abundance of mosasaurs in particular suggests a highly productive coastal area. Angola today lies at the northern limit of the Namibian Desert, the so-called Skeleton Coast, which results from prevailing southeasterly winds of the descending limb of the southern Hadley Cell sweeping across the African coast. The Benguela upwelling and a highly productive sea are found today off the Namibian Desert coast. However, the Benguela upwelling system, based on results of DSDP studies, is said to have originated in the late Neogene and therefore cannot explain the productivity found along the length of the West African coast. The explanation is found in the northward drift of Africa through the arid climate zone, and is demonstrated by the tracing of the paleogeographic position of fossil localities through time.

Mateus, O. (2009).  The Cretaceous Skeleton Coast of Angola. 29, , 1 Abstract
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Jacobs, L., Polcyn M., Mateus O., Schulp, & Neto A. (2009).  The Cretaceous Skeleton Coast of Angola. Journal of Vertebrate Paleontology. 29, 121., Number 3 Abstract
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Jacobs, L. L., Polcyn M. J., Mateus O., Schulp A. S., & Neto A. (2009).  The Cretaceous Skeleton Coast of Angola. Journal of Vertebrate Paleontology. 29, 121–121., Number 3 Abstract
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Jacobs, L. L., Mateus O., Polcyn M. J., Schulp A. S., Scotese C. R., Goswami A., Ferguson K. M., Robbins J. A., Vineyard D. P., & Neto A. B. (2009).  Cretaceous paleogeography, paleoclimatology, and amniote biogeography of the low and mid-latitude South Atlantic Ocean. BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE. 180, 333-341., Jan: Univ Agostinho Neto, Univ Nova Lisboa, So Methodist Univ, Univ Texas Arlington, Museu Lourinha, Nat Hist Museum Abstractjacobs_mateus_et_al_2009_cretaceous_paleogeography_paleoclimatology_and_amniote_biogeography_of_the_south_atlantic_ocean_angola_africa_currents.pdf

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Jacobs, L. L., Mateus O., Polcyn M. J., Schulp A. S., Scotese C. R., Goswami A., Ferguson K. M., Robbins J. A., Vineyard D. P., & Neto A. B. (2009).  Cretaceous paleogeography, paleoclimatology, and amniote biogeography of the low and mid-latitude South Atlantic Ocean. Bulletin de la Societe Geologique de France. 180, 333-341., Number 4 Abstract
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Mateus, O., Morais M., Schulp A., Jacobs L., & Polcyn M. (2006).  The Cretaceous of Angola. JOURNAL OF VERTEBRATE PALEONTOLOGY. 26, 96A-97A., Jan Abstractmateus_et_al_2006_svp_abstracts_cretaceous_fo_angola.pdf

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Mateus, O., Morais M. L., Schulp A. S., Jacobs L. L., & Polcyn M. J. (2006).  The Cretaceous of Angola. Journal of Vertebrate Paleontology. 26, 96-97., Number (Suppl. To 3) Abstract
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Mateus, O., Morais M. L., Schulp A. S., Jacobs L. L., & Polcyn M. J. (2006).  The Cretaceous of Angola. Journal of Vertebrate Paleontology. 26, 96–97., Number (Suppl. T Abstract
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Mateus, O., Polcyn M. J., Jacobs L. L., Araújo R., Schulp A. S., Marinheiro J., Pereira B., & Vineyard D. (2012).  Cretaceous amniotes from Angola: dinosaurs, pterosaurs, mosasaurs, plesiosaurs, and turtles. V Jornadas Internacionales sobre Paleontología de Dinosaurios y su Entorno. 71-105., Salas de los Infantes, Burgos Abstractmateus_et_al_2012_amniotes_from_angola_cretaceous_amniotes_from_angola_dinosaurs_pterosaurs_mosasaurs.pdf

Although rich in Cretaceous vertebrate fossils, prior to 2005 the amniote fossil record of Angola was poorly known. Two horizons and localities have yielded the majority of the vertebrate fossils collected thus far; the Turonian Itombe Formation of Iembe in Bengo Province and the Maastrichtian Mocuio Formation of Bentiaba in Namibe Province. Amniotes of the Mesozoic of Angola are currently restricted to the Cretaceous and include eucryptodire turtles, plesiosaurs, mosasaurs, pterosaurs, and dinosaurs. Recent collecting efforts have greatly expanded our knowledge of the amniote fauna of Angola and most of the taxa reported here were unknown prior to 2005.

Marx, M. P., Mateus O., Polcyn M. J., Schulp A. S., Gonçalves O. A., & Jacobs L. L. (2021).  The cranial anatomy and relationships of Cardiocorax mukulu (Plesiosauria: Elasmosauridae) from Bentiaba, Angola. PLOS ONE. 16(8), e0255773 - ., 2021/08/17: Public Library of Science Abstractmarx_et_al_2021_cardiocorax_angola.pdfWebsite

We report a new specimen of the plesiosaur Cardiocorax mukulu that includes the most complete plesiosaur skull from sub-Saharan Africa. The well-preserved three-dimensional nature of the skull offers rare insight into the cranial anatomy of elasmosaurid plesiosaurians. The new specimen of Cardiocorax mukulu was recovered from Bentiaba, Namibe Province in Angola, approximately three meters above the holotype. The new specimen also includes an atlas-axis complex, seventeen postaxial cervical vertebrae, partial ribs, a femur, and limb elements. It is identified as Cardiocorax mukulu based on an apomorphy shared with the holotype where the cervical neural spine is approximately as long anteroposteriorly as the centrum and exhibits a sinusoidal anterior margin. The new specimen is nearly identical to the holotype and previously referred material in all other aspects. Cardiocorax mukulu is returned in an early-branching or intermediate position in Elasmosauridae in four out of the six of our phylogenetic analyses. Cardiocorax mukulu lacks the elongated cervical vertebrae that is characteristic of the extremely long-necked elasmosaurines, and the broad skull with and a high number of maxillary teeth (28–40) which is characteristic of Aristonectinae. Currently, the most parsimonious explanation concerning elasmosaurid evolutionary relationships, is that Cardiocorax mukulu represents an older lineage of elasmosaurids in the Maastrichtian.

Stockdale, M., Benton M., & Mateus O. (2014).  Cracking dinosaur endothermy: paleophysiology unscrambled. Journal of Vertebrate Paleontology. Program and Abstracts, 2014, 235-236.stockdale_et_al_2014_eggshells_abstract_svp.pdf
Mateus, O. (2014).  Cracking dinosaur endothermy: paleophysiology unscrambled. NA, , 1 Abstract

The amniote eggshell functions as a respiratory structure adapted for the optimal transmission of respiratory gasses to and from the embryo according to its physiological requirements. Therefore amniotes with higher oxygen requirements, such as those that sustain higher metabolic rates, can be expected to have eggshells that can maintain a greater gas flux to and from the egg. Studies of extant amniotes have found that eggshells of reduced porosity impose a limit on the metabolic rate of the offspring. Here we show a highly significant relationship between metabolic rates and eggshell porosity in extant amniotes that predicts highly endothermic metabolic rates in dinosaurs. This study finds the eggshell porosity of extant endotherms to be significantly higher than that of extant ectotherms. Eggshell porosity values of dinosaurs are found to be significantly higherthan that of extant ectotherms, but not extant endotherms. Dinosaur eggshells are commonly preserved in the fossil record, and porosity may be readily identified and measured. This provides a simple tool to identify metabolic rates in extinct egg-laying tetrapods whose eggs possessed a mineralized shell

Mateus, I., Mateus H., Antunes M. T., Mateus O., Taquet P., Ribeiro V., & Manuppella G. (1997).  Couvée, œufs et embryons d'un Dinosaure Théropode du Jurassique supérieur de Lourinhã (Portugal). Comptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes. 325, 71–78., Number 1 Abstract
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Mateus, I., Mateus H., Antunes M. T., Mateus O., Taquet P., Ribeiro V., & Manuppella G. (1997).  Couvée, øe}ufs et embryons d{\textquotesingle}un Dinosaure Théropode du Jurassique supérieur de Lourinha (Portugal). Comptes Rendus de l{\textquotesingle}Académie des Sciences - Series {IIA} - Earth and Planetary Science. 325, 71–78., jul, Number 1: Elsevier {BV} AbstractWebsite
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Mateus, I., Mateus H., Antunes M. T., Mateus O., Taquet P., Ribeiro V., & Manuppella G. (1997).  Couvée, oeufs et embryons d'un dinosaure théropode du Jurassique supérieur de Lourinhã (Portugal). C.R Acad. Sci. Paris, Sciences de la terre et des planetes. 325, 71-78., Jully, Number 1 Abstractmateus_et_al_1997_eggs_embryos_nest__couvee_oeufs_et_embryons_dun_dinosaure_theropode_du_jurassique_superieur_de_lourinha_portugal.pdfWebsite

Several well preserved clutches of dinosaurs have been discovered in the upper Kimmeridgian/ Tithonian of Lourinhã (Estramadur Province, Portugal). Some eggs of one clutch contained embryo elements of a theropod dinosaur. The egg-shell resembles that of eggs which have been discovered in the Upper Jurassic of Colorado

Mateus, I., Mateus H., Antunes M. T., Mateus O., Taquet P., Ribeiro V., & Manuppella G. (1997).  Couvée, oeufs et embryons d'un dinosaure théropode du Jurassique supérieur de Lourinhã (Portugal). Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science. 325, 71–78., Number 1 Abstract
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Hansen, B. B., Milàn J., Clemmensen L. B., Adolfssen J. S., Estrup E. J., Klein N., Mateus O., & Wings O. (2016).  Coprolites from the Late Triassic Kap Stewart Formation, Jameson Land, East Greenland: morphology, classification and prey inclusions. Geological Society, London, Special Publications. 434(1), 49-69. Abstracthansen_et_al_2015_coprolites_from_the_late_triassic_kap_stewart_formation_jameson_land_east_greenland.pdfWebsite

A large collection of vertebrate coprolites from black lacustrine shales in the Late Triassic (Rhaetian–Sinemurian) Kap Stewart Formation, East Greenland is examined with regard to internal and external morphology, prey inclusions, and possible relationships to the contemporary vertebrate fauna. A number of the coprolites were mineralogically examined by X-ray diffraction (XRD), showing the primary mineral composition to be apatite, clay minerals, carbonates and, occasionally, quartz in the form of secondary mineral grains. The coprolite assemblage shows multiple sizes and morphotypes of coprolites, and different types of prey inclusions, demonstrating that the coprolite assemblage originates from a variety of different producers.Supplementary material: A description of the size, shape, structure, texture, contents and preservation of the 328 specimens is available at https://doi.org/10.6084/m9.figshare.c.2134335

Hansen, B. B., Milàn J., Clemmensen L. B., Adolfssen J. S., Estrup E. J., Klein N., Mateus O., & Wings O. (2015).  Coprolites from the Late Triassic Kap Stewart Formation, Jameson Land, East Greenland: morphology, classification and prey inclusions. Geological Society, London, Special Publications. 434, AbstractWebsite

A large collection of vertebrate coprolites from black lacustrine shales in the Late Triassic (Rhaetian–Sinemurian) Kap Stewart Formation, East Greenland is examined with regard to internal and external morphology, prey inclusions, and possible relationships to the contemporary vertebrate fauna. A number of the coprolites were mineralogically examined by X-ray diffraction (XRD), showing the primary mineral composition to be apatite, clay minerals, carbonates and, occasionally, quartz in the form of secondary mineral grains. The coprolite assemblage shows multiple sizes and morphotypes of coprolites, and different types of prey inclusions, demonstrating that the coprolite assemblage originates from a variety of different producers.Supplementary material: A description of the size, shape, structure, texture, contents and preservation of the 328 specimens is available at https://doi.org/10.6084/m9.figshare.c.2134335

Mateus, O., & Jacinto J. J. (2002).  Contribuição para o estudo de Hemidactylus turcicus (Reptilia, Gekkonidae): ritmos de actividade e microhabitat em Évora, Portugal. VII Congresso Luso-Espanhol de Herpetologia. 136., Évora Abstract

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Mateus, O., & Jacinto J. J. (2002).  Contribuição para o estudo de Hemidactylus turcicus (Reptilia, Gekkonidae): ritmos de actividade e microhabitat em Évora, Portugal. VII Congresso Luso-Espanhol de Herpetologia. 136., Évora Abstract
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Mateus, O., & Jacinto J. J. (2002).  Contribuição para o estudo de Hemidactylus turcicus (Reptilia, Gekkonidae): ritmos de actividade e microhabitat em Évora, Portugal. VII Congresso Luso-Espanhol de Herpetologia. 136–136., Évora Abstract
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Tschopp, E., Brinkman D., Henderson J., Turner M. A., & Mateus O. (2018).  Considerations on the replacement of a type species in the case of the sauropod dinosaur Diplodocus Marsh, 1878. Geology of the Intermountain West. 5, 245-262.tschoppetal2018.pdf
Tschopp, E., Brinkman D., Henderson J., Turner M. A., & Mateus O. (2018).  Considerations on the replacement of a type species in the case of the sauropod dinosaur Diplodocus Marsh, 1878. Geology of the Intermountain West. 5, 245-262. Abstract
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Moreno-Azanza, M., Bauluz B., Canudo J. I., & Mateus O. (2017).  The conservative structure of the ornithopod eggshell: electron backscatter diffraction characterization of Guegoolithus turolensis from the Early Cretaceous of Spain. Journal of Iberian Geology. 1-9., 2017 Abstractthe_conservative_structure_of_the_ornithopod_eggshell.pdfWebsite

The Spheroolithidae oospecies Guegoolithus turolensis, putatively attributed to non-hadrosauroid styracosterns was first described in the Barremian of the Iberian Basin, and later reported in the Valanginian–Hauterivian of the Cameros Basin, with both occurrences separated by a few hundred kilometres but by over 10 million years.

Moreno-Azanza, M., Bauluz B., Canudo J. I., & Mateus O. (2017).  The conservative structure of the ornithopod eggshell: electron backscatter diffraction characterization of Guegoolithus turolensis from the Early Cretaceous of Spain. Journal of Iberian Geology. 43, 235–243., jun, Number 2: Springer Nature AbstractWebsite
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Tschopp, E., Mateus O., & Norell M. (2018).  Complex Overlapping Joints between Facial Bones Allowing Limited Anterior Sliding Movements of the Snout in Diplodocid Sauropods. American Museum NovitatesAmerican Museum Novitates. 1 - 16., 2018: American Museum of Natural History Abstracttschopp_et_al_2018.pdfWebsite

ABSTRACT Diplodocid sauropods had a unique skull morphology, with posteriorly retracted nares, an elongated snout, and anteriorly restricted, peglike teeth. Because of the lack of extant analogs in skull structure and tooth morphology, understanding their feeding strategy and diet has been difficult. Furthermore, the general rarity of sauropod skulls and the fragility of their facial elements resulted in a restricted knowledge of cranial anatomy, in particular regarding the internal surface of the facial skull. Here, we describe in detail a well-preserved diplodocid skull visible in medial view. Diagnostic features recognized in other skulls observable in lateral view, such as the extended contribution of the jugal to the antorbital fenestra, are obliterated in medial view due to extensive overlapping joints between the maxilla, jugal, quadratojugal, and the lacrimal. These overlapping joints permitted limited anterior sliding movement of the snout, which likely served as a kind of ?shock-absorbing? mechanism during feeding. Diplodocid skulls therefore seem to have evolved to alleviate stresses inflicted on the snout during backward movements of the head, as would be expected during branch-stripping or raking.ABSTRACT Diplodocid sauropods had a unique skull morphology, with posteriorly retracted nares, an elongated snout, and anteriorly restricted, peglike teeth. Because of the lack of extant analogs in skull structure and tooth morphology, understanding their feeding strategy and diet has been difficult. Furthermore, the general rarity of sauropod skulls and the fragility of their facial elements resulted in a restricted knowledge of cranial anatomy, in particular regarding the internal surface of the facial skull. Here, we describe in detail a well-preserved diplodocid skull visible in medial view. Diagnostic features recognized in other skulls observable in lateral view, such as the extended contribution of the jugal to the antorbital fenestra, are obliterated in medial view due to extensive overlapping joints between the maxilla, jugal, quadratojugal, and the lacrimal. These overlapping joints permitted limited anterior sliding movement of the snout, which likely served as a kind of ?shock-absorbing? mechanism during feeding. Diplodocid skulls therefore seem to have evolved to alleviate stresses inflicted on the snout during backward movements of the head, as would be expected during branch-stripping or raking.

Marzola, M., Mateus O., Russo J., & Milàn J. (2014).  Comparison of modern and fossil Crocodylomorpha eggs and contribution to the oophylogeny of Amniota. XII Annual Meeting of the European Association of Vertebrate Palaeontologists. , p. 192, Regione Piemonte: European Association of Vertebrate Palaeontologists. Museo Regionale di Scienze Naturalimarzola_et_al._2014_comparison_of_modern_and_fossil_crocodylomorpha_eggs_and_contribution_to_the_oophylogeny_of_amniota-_eavp_2014.pdf
Mateus, O. (2014).  Comparison of modern and fossil Crocodylomorpha eggs and contribution to the oophylogeny of Amniota. Annual Meeting of the European Association of Vertebrate Palaeontologists. , p. 192, Regione Piemonte: European Association of Vertebrate Palaeontologists. Museo Regionale di Scienze Naturali. Abstract
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Mateus, O. (2014).  Comparison of modern and fossil Crocodylomorpha eggs and contribution to the oophylogeny of Amniota. Annual Meeting of the European Association of Vertebrate Palaeontologists. XII Annual Meeting of the European Association of Vertebrate Palaeontologists, 192., 1 Abstract
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Marzola, M., Mateus O., Schulp A. S., Jacobs L. L., Polcyn M. J., Pervov V., Goncalves A. O., & Morais M. L. (2015).  Comparative anatomy and systematics of Cretaceous mammal tracks of Angola. 13th Annual Meeting of the European Association of Vertebrate Palaeontologists - EAVP 2015. , July 2015, Opole, Poland: European Association of Vertebrate Palaeontologistsmarzola_et_al_2015_catoca_tracks_eavp.pdf
Marzola, M., Mateus O., Schulp A. S., Jacobs L. L., Polcyn M. J., Pervov V., Goncalves A. O., & Morais M. L. (2015).  Comparative anatomy and systematics of Cretaceous mammal tracks of Angola. 13th Annual Meeting of the European Association of Vertebrate Palaeontologists - EAVP 2015. , July 2015, Opole, Poland: European Association of Vertebrate Palaeontologists Abstract
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Marzola, M., Mateus O., Schulp A. S., Jacobs L. L., Polcyn M. J., Pervov V., Goncalves A. O., & Morais M. L. (2015).  Comparative anatomy and systematics of Cretaceous mammal tracks of Angola. 13th Annual Meeting of the European Association of Vertebrate Palaeontologists - EAVP 2015. , Opole, Poland Abstract
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Marzola, M., Mateus O., Schulp {A. S. }, Jacobs {L. L. }, Polcyn {M. J. }, Pervov V., Goncalves {A. O. }, & Morais {M. L. } (2015).  Comparative anatomy and systematics of Cretaceous mammal tracks of Angola. 35. Abstract
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Mateus, O. (2009).  Colecções paleontológicas do Museu da Lourinhã (Portugal) / Paleontological collections of the Museum of Lourinhã (Portugal). (Unknown Unknown, Ed.).Journal of Paleontological Techniques. 18–19.., 1 Abstract
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Mateus, O. (2010).  Colecções e museus de Geologia: missão e gestão. , 1: Ed. Universidade de Coimbra e Centro de Estudos de História e Filosofia da Ciência Abstract
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Brandao, J. M., Callapez P. M., Mateus O., & Castro P. (2010).  Colecções e museus de Geologia: missão e gestão. , Jan: Ed. Universidade de Coimbra e Centro de Estudos e Filosofia da História da Ciência. Abstract

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