Publications

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Conference Proceedings
Pereira, B., Mateus O., Kullberg J. C., & Rocha R. (2017).  The geotouristic potential of the Oeste Region of Portugal. 14th European Geoparks Conference | Abstracts Book 167. 167., Ponta Delgadapereira_et_al_2017_geotouristic_oeste.pdf
Strganac, C., Jacobs L. L., Ferguson K. M., Polcyn M. J., Mateus O., Schulp A. S., & Morais M. L. (2013).  Late Cretaceous marine reptiles and cooling at the South Atlantic coast inferred through stable oxygen isotopes of Inoceramus from the Namibe Basin, Angola. Geological Society of America Abstracts with Programs. Vol. 45, No. 7, p.0.
Polcyn, M. J., Jacobs L. L., Mateus O., Schulp A. S., Strganac C., Araújo R., Graf J. F., Vineyard D., & Myers T. S. (2013).  A marine vertebrate assemblage from the Campanian-Maastrichtian boundary at Bentiaba, Angola. Geological Society of America Abstracts with Programs. Vol. 45, No. 7, p.0. polcyn_et_al_2013_abstract__a_marine_vertebrate_assemblage_from_the_campanian-maastrichtian_boundary_at_bentiaba_angola_2013__gsa_27-30_october_2013.pdf
Puértolas‐Pascual, E., Serrano‐Martínez A., Kuzmin I. T., & Mateus O. (2022).  Neuroanatomy of the Cenomanian crocodylomorph Portugalosuchus. XIX Annual Conference of the European Association of Vertebrate Paleontologists. 170-171. Abstractpuertolas-pascoal_et_al_2022_portugalosuchus_eavp_2022_abstract_volume.pdf

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Puértolas-Pascual, E., & Mateus O. (2018).  A new 3D preserved articulated partial skeleton of Neosuchia from the Upper Jurassic of Portugal. XVI Annual Meeting of the European Association of Vertebrate Palaeontologists. 158., Caparica, Portugal June 26th-July 1st, 2018: Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa Abstractpuertolas-pascual__mateus_2018_eavp_abstract.pdf

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Myers, T. S., Mateus O., Polcyn M. J., Vineyard D., & Jacobs L. L. (2016).  A new chelonioid turtle from the Paleocene of Cabinda, Angola. Annual Meeting of the Society of Vertebrate Paleontology. 194.: Journal of Vertebrate Paleontology, Program and Abstracts, 2016 Abstractmyers_etal_2016_chelonoid_angola_turtle_svp_abstract.pdf

We report a new chelonioid turtle on the basis of a nearly complete skull collected in lower Paleocene, shallow marine deposits, equivalent to the offshore Landana Formation, near the town of Landana in Cabinda Province, Angola. Chelonioid material previously reported from this locality is likely referable to this new taxon. The well-preserved skull is missing the left quadrate, squamosal, and prootic, both opisthotics, and the mandible. The skull possesses a rod-like basisphenoid rostrum, which is a synapomorphy of Chelonioidea, but it differs from other chelonioid skulls in that the contact between the parietal and squamosal is absent, and the posterior palatine foramen is present. Phylogenetic analysis recovers the new taxon as a basal chelonioid. The Paleocene– Eocene strata near Landana have produced a wealth of turtle fossils, including the holotype of the pleurodire Taphrosphys congolensis. A turtle humerus collected from the Landana locality differs morphologically from the humeri of chelonioids and Taphrosphys, indicating the presence of a third taxon. Chelonioid fossil material in the Landana assemblage is rare compared to the abundant fragmentary remains of Taphrosphys that are found throughout the stratigraphic section. This disparity in abundance suggests the new chelonioid taxon preferred open marine habitats, whereas Taphrosphys frequented nearshore environments.

Myers, T. S., Mateus O., Polcyn M. J., Vineyard D., & Jacobs L. L. (2016).  A new chelonioid turtle from the Paleocene of Cabinda, Angola. Journal of Vertebrate Paleontology, Program and Abstracts, 2016, p. 194.. 194. Abstract

We report a new chelonioid turtle on the basis of a nearly complete skull collected in lower Paleocene, shallow marine deposits, equivalent to the offshore Landana Formation, near the town of Landana in Cabinda Province, Angola. Chelonioid material previously reported from this locality is likely referable to this new taxon. The well-preserved skull is missing the left quadrate, squamosal, and prootic, both opisthotics, and the mandible. The skull possesses a rod-like basisphenoid rostrum, which is a synapomorphy of Chelonioidea, but it differs from other chelonioid skulls in that the contact between the parietal and squamosal is absent, and the posterior palatine foramen is present. Phylogenetic analysis recovers the new taxon as a basal chelonioid. The Paleocene– Eocene strata near Landana have produced a wealth of turtle fossils, including the holotype of the pleurodire Taphrosphys congolensis. A turtle humerus collected from the Landana locality differs morphologically from the humeri of chelonioids and Taphrosphys, indicating the presence of a third taxon. Chelonioid fossil material in the Landana assemblage is rare compared to the abundant fragmentary remains of Taphrosphys that are found throughout the stratigraphic section. This disparity in abundance suggests the new chelonioid taxon preferred open marine habitats, whereas Taphrosphys frequented nearshore environments.

Graf, J., Jacobs L. L., Polcyn M. J., Mateus O., & Schulp A. S. (2011).  New fossil whales from Angola. 71st Annual Meeting of the Society of Vertebrate Paleontology. 119., Jan: Abstracts of the 71st Annual Meeting of the Society of Vertebrate Paleontologygraf_et_al_mateus_2011_fossil_whales_from_angola_svp11abstracts.pdf
López-Rojas, V., Puértolas-Pascual E., Marinheiro J., Mateus O., & Mateus S. (2022).  A new goniopholidid skull from the Late Jurassic of Lourinhã, Portugal. XXVII Jornadas SEP e V Congreso Ibérico de Paleontologia. 101., Cuencalopez-rojas_et_al_2022_goniopholis_jornadas_sep_cuenca_abstract_2022.pdf
Martino, R., Ríos M., Mateus O., Rook L., & Pandolf L. (2022).  New insights into the hippopotamid (Mammalia, Hippopotamidae) from the Casino Basin (Tuscany, Italy). XIX Annual conference of the European Association of Vertebrate Palaeontologists (19th EAVP)At: Benevento, Italy. 119. Abstract
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Mateus, O., Callapez P. M., & Puértolas-Pascual E. (2017).  The oldest Crocodylia? a new eusuchian from the Late Cretaceous (Cenomanian) of Portugal. Journal of Vertebrate Paleontology, Program and Abstracts. 2017, 160. Abstractmateus_et_al_2017_oldest_crocodylia_svp_2017_abstract.pdf

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Puértolas-Pascual, E., Serrano-Martínez A., Kuzmin I. T., & Mateus O. (2022).  Paleoneuroanatomía de Portugalosuchus, un cocodrilomorfo eusuquio del Cenomaniense de Portugal. XXXVII Jornadas SEP y V Congreso Ibérico de Paleontología. 153., Cuenca: ISBN 13: 978-84-09-44478-6 Abstractpuertolas-pascula_et_al_2022_portugalosuchus_jornadas_sep_cuenca_abstract_2022.pdf

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Jacobs, L., Polcyn M., Araújo R., Strganac C., & Mateus O. (2010).  Physical drivers of evolution and the history of the marine tetrapod fauna of Angola. Annual Meeting of the Society of Vertebrate Paleontology. 110A., Jan Abstractjacobs_et_al_mateus_2010_physical_drivers_marine_tetrapod_fauna_of_angola_svp10abstracts.pdf

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Araújo, R., Polcyn M., Jacobs L. L., Mateus O., & Schulp A. S. (2011).  Plesiosaur structural extreme from the Maastrichtian of Angola. 71st Annual Meeting of the Society of Vertebrate Paleontology. 63., Jan: Abstracts of the 71st Annual Meeting of the Society of Vertebrate Paleontology Abstractaraujo_et_al_mateus_2011_plesiosaur_extreme_angola_svp11abstracts.pdf

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Martins, R. M. S., Beckmann F., Castanhinha R., Mateus O., Araújo R., & Pranzas P. K. (2012).  Synchrotron radiation-based micro-computed tomography applied to the characterization of dinosaur fossils from the Lourinhã Formation. 1 st . Meeting of Synchrotron Radiation Users from Portugal. 1-2., Caparica, Portugalmartins_et_al_2012_tomography_enurs_martins-rui_dinosaurfossils.pdf
Polcyn, M. J., Jacobs L. L., Schulp A. S., Mateus O., & Araújo R. (2015).  Tethyan and Weddellian biogeographic mixing in the Maastrichtian of Angola. Annual Meeting of the Society of Vertebrate Paleontology. 196., Dallas, TXpolcyn_etal2015_mix_fauna_angola_svp_abstract.pdf
Park, J., Lee Y., Currie P. J., Kobayashi Y., Koppelhus E. B., Barsbold R., Lee S., Kim S., & Mateus O. (2019).  Three new skulls of the Late Cretaceous armored dinosaur Talarurus plicatospineus Maleev, 1952. Journal of Vertebrate Paleontology, Program and Abstracts. 165-166.park_et_al_2019_svp_abstract.pdf
Park, J., Lee Y., Currie P. J., Kobayashi Y., Koppelhus E. B., Barsbold R., Lee S., Kim S., & Mateus O. (2019).  Three new skulls of the Late Cretaceous armored dinosaur Talarurus plicatospineus Maleev, 1952. Journal of Vertebrate Paleontology, Program and Abstracts. 165-166. Abstract
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Martins, R. M. S., Beckmann F., Castanhinha R., Araújo R., O. Mateus, & Pranzas P. K. (2011).  Tomographic techniques for the study of exceptionally preserved dinosaur and crocodile fossils from the mesozoic of Portugal. VII Encontro Nacional de Biologia Evolutiva, Coimbra, 21 Dezembro 2011. 19. Abstractmartins_et_al_mateus_2011_tomographic_techniques_for_the_study_of_exceptionally_preserved_dinosaur_and_crocodile.pdf

Portugal is ranked within the ten countries with more dinosaur taxa and the Lourinhã Formation is known
by the Late Jurassic findings of dinosaurs and other fossils. Often, studies of the external morphological
characteristics of the fossils are not sufficient and, observations of internal structures, using non-
destructive techniques, are required. The fossils here presented belong to the Museum da Lourinhã
(Portugal) and comprise a lower jaw of a basal crocodilian (possibly a Tomistomidae), eggshells and
several vertebrae from the exceptionally well preserved in ovo remains of Late Jurassic theropod dinosaur
Lourinhanosaurus. Neutron Tomography (NT) experiments with this material has been carried out at the
Geesthacht Neutron Facility in Germany. Additionally, eggshell fragments and several vertebrae have
been studied by Synchrotron-Radiation based Micro-Computed Tomography (SRμCT) at the HARWI II and
BW2 beamlines, respectively. These beamlines are operated by the Helmholtz-Zentrum Geesthacht at the
storage ring DORIS III at the Deutsches Elektronen–Synchrotron DESY in Hamburg, Germany. In both cases
(NT and SRμCT) complete 3D recordings have been obtained using a non-destructive procedure. The high-
quality tomographic datasets can be effectively studied through interactive digital visualization. Hence,
these visualization methods provide precious information about the 3D internal micro morphology of
fossils, like the network of the eggshell pores, often invisible in more traditional techniques, and provide a
direct window into the evolutionary history of organisms.

Muchagata, J., Mateus O., & Prieto R. (2018).  Treasures from the depths: first record of Tusciziphius (fossil beaked whale) from the Azores islands deep waters and the importance of local communities to science. XVI Annual Meeting of the European Association of Vertebrate Palaeontologists. 132., Caparica, Portugal June 26th-July 1st, 2018 Abstractmuchagata_et_al_2018_eavp_abstract.pdf

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Polcyn, M. J., Jacobs L. L., Schulp A. S., & Mateus O. (2015).  Trolling the Cretaceous Seas: Marine Amniotes of Two West Coast Margins. Geological Society of America Annual Meeting. 55.: Geological Society of America Abstracts with Programs. Vol. 47, No. 4, p.55 Abstract

In this session we review the Upper Cretaceous marine amniote records from the west coasts of North America and Africa. Recent work by our group in Angola, on the west coast of Africa, has opened up new fossiliferous localities, producing well-preserved turtles, plesiosaurs, and mosasaurs, ranging in age from Late Turonian to Late Maastrichtian. These African localities were deposited in arid latitudes and highly productive upwelling zones along the passive margin of a growing South Atlantic Ocean. The fossil record of Cretaceous marine amniotes from the West Coast of North America is relatively meager when compared to the African record and the prolific fossil beds laid down in the epicontinental seas of the Western Interior Seaway and northern Europe. Nonetheless, these localities provide an important glimpse of a marine ecosystem that developed on the active margins of a deep ocean basin. Historically considered to be depauperate and endemic, the west coast fauna was characterized by unusual forms such as Plotosaurus, arguably one of the most derived mosasaurs; however, in recent years, additional taxa have been described, revealing species diversity and ecological partitioning within these communities and in some cases, faunal interchange with other regions. The large quantity of well-preserved fossils from the west coast of Africa is influenced in part by its paleogeographic position, deposited within highly productive areas of Hadley Cell controlled upwelling zones. By contrast, the North American west coast localities have been deposited in temperate and higher latitudes since the Late Cretaceous. Nonetheless, the North American and African faunas share some common characteristics in a possessing a mix of endemic and more cosmopolitan forms. Habitat partitioning reflected in tooth form and body size is comparable between the Angolan and the North American west coast, and there is remarkable convergence in taxa which appear to exploit certain like-niches.

Moreno-Azanza, M., Ezquerro L., Gasca J. M., Díaz-Berenguer E., Nuñez-Lahuerta C., Pérez-Pueyo M., Puértolas-Pascual E., Sellés A. G., Vila B., & Laita E. (2021).  Two latest Cretaceous egg localities in the external sierras (Southern Pyrenees, Huesca Province, NE Spain). Palaeovertebrata - XVIII annual conference of the European Association of Vertebrate Palaeontologists. 44, 120-121. Abstractmoreno-azanza_et_al_2021_eggs_eavp_abstract.pdf

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Conference Paper
Mateus, O., Pereira B., Rocha R., & Kullberg J. C. (2018).  Aspiring Geopark Oeste in Portugal: scientific highlights and importance. 8th International Conference on UNESCO Global Geoparks. , 8-14 Sept., Adamello Brenta Geopark, Trentinomateus_et_al_2018_geopark_oeste.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 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., 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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Jacobs, L. L., Polcyn M. J., Mateus O., & Schulp A. S. (2023).  Deep time conservation paleobiology of the Atlantic jigsaw puzzle and the future of the southwestern Angolan coast. Bulletin of the Florida Museum of Natural History. 60(2), 90.: In: Abstracts of the 2nd Conservation Paleobiology Symposium. https://doi … Abstractjacobs_et_al_2023_jigsaw.pdf

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Mateus, O., Jacobs L. L., Polcyn M. J., Schulp A. S., Neto A. B., & Antunes M. T. (2008).  Dinosaur and turtles from the Turonian of Iembe, Angola. Livro de Resumos de Tercer Congreso Latinoamericano de Paleontologia de Vertebrados. 156., Neuquén, Argentina Abstractmateus_et_al_2008_dinosaur_and_turtles_from_the_turonian_of_iembe_angola.pdf

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Mateus, O., Jacobs L. L., Polcyn M. J., Schulp A. S., Neto A. B., & Antunes M. T. (2008).  Dinosaur and turtles from the Turonian of Iembe, Angola. Livro de Resumos de Tercer Congreso Latinoamericano de Paleontología de Vertebrados. 156., Neuquén, Argentina Abstract
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Mateus, O., Jacobs L. L., Polcyn M. J., Schulp A. S., Neto A. B., & Antunes M. T. (2008).  Dinosaur and turtles from the Turonian of Iembe, Angola. Livro de Resumos de Tercer Congreso Latinoamericano de Paleontología de Vertebrados. 156–156., Neuquén, Argentina Abstract
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Polcyn, M. J., Bardet N., Amaghzaz M., Gon\{\c c\}alves O. A., Jourani E., Kaddumi H. F., Lindgren J., Mateus O., Meslouhf S., Morais M. L., Pereda-Suberbiola X., Schulp A. S., Vincent P., & Jacobs L. L. (2016).  An extremely derived plioplatecarpine mosasaur from the Maastrichtian of Africa and the Middle East. 5th Triennial Mosasaur Meeting- a global perspective on Mesozoic marine amniotes. 16-20, May 16-20, 2016., Uppsala, Sweden Abstract
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Polcyn, {M. J. }, Bardet N., Amaghzaz M., Gonçalves {A. O. }, Jourani E., Kaddumi {H. F. }, Lindgren J., Mateus O., Meslouhf S., & Morais {M. L. } (2016).  An extremely derived plioplatecarpine mosasaur from the Maastrichtian of Africa and the Middle East. 32–33. Abstract
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Polcyn, M. J., Jacobs L. L., Strganac C., Mateus O., Myers T. S., May S., Araújo R., Schulp A. S., & Morais M. L. (2014).  Geological and paleoecological setting of a marine vertebrate bonebed from the Lower Maastrichtian at Bentiaba, Angola. Secondary Adaptation of Tetrapods to Aquatic Life. , 2-4 Jun 2014, Washington DC, USA
Pereira, B., Mateus O., Kullberg J. C., & Rocha R. (2017).  The geotouristic potential of the Oeste Region of Portugal. Abstract
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Mateus, O. (1999).  Monofilia dos dinossauros e Origem das Aves: Serão as aves dinossauros?. (P, P Catry, F Moreira, Ed.).Actas do II Congresso de Ornitologia. 184-185., Lisboa: SPEA- Sociedade Portuguesa para o Estudo das Aves Abstract
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Mateus, O. (1999).  Monofilia dos dinossauros e Origem das Aves: Serão as aves dinossauros?. (Spea- Sociedade Portuguesa para o Estudo das Aves, P, P Catry, F Moreira, Ed.).Actas do II Congresso de Ornitologia. 184-185., Lisboa Abstract
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Polcyn, M. J., Jacobs L. L., Schulp A. S., & Mateus O. (2007).  Morphology and systematic position of Angolasaurus bocagei and the evolution of the braincase in Plioplatecarpine mosasaurs. Second Mosasaur Meeting. , May 3-6, 2007, Sternberg Museum, Hays, Kansaspolcyn_et_al_2007_angolosaurus_mosasaurmeetingabstracts.pdf
Polcyn, M. W., Jacobs L. L., Schulp A. S., & Mateus O. (2007).  Morphology and systematic position of Angolasaurus bocagei and the evolution of the braincase in Plioplatecarpine mosasaurs. (Sternberg, Museum, Ed.).Second Mosasaur Meeting. 20., Hays, Kansas Abstract
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Polcyn, M. W., Jacobs L. L., Schulp A. S., & Mateus O. (2007).  Morphology and systematic position of Angolasaurus bocagei and the evolution of the braincase in Plioplatecarpine mosasaurs. Second Mosasaur Meeting. 20–20., Hays, Kansas Abstract
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Polcyn, M. W., Jacobs L. L., Schulp A. S., & Mateus O. (2007).  The mosasaurs of Angola. Second Mosasaur Meeting. 21., Hays, Kansas: Sternberg Museum Abstract

Although occurrences of marine reptiles have been previously reported from Angola, with the exception of two Turonian taxa, these reports were based largely on isolated teeth. Fieldwork in 2005 and 2006 yielded well-preserved remains of marine reptiles including plesiosaurs, turtles, and mosasaurs. The mosasaurs discussed here were recovered from two field areas: Turonian sediments at Iembe along the north coast and Maastrichtian sediments at Bentiaba on the south coast. The Turonian section near Iembe produced at least two new specimens of Angolasaurus bocagei and one fragmentary specimen of Tylosaurus iembeensis. One of the Angolasaurus specimens is represented by a well preserved, complete and articulated skull and partial postcrania, including portions of the forelimbs and pectoral girdle. The preservation of material from the Bentiaba locality is remarkable due to the grain support of the entombing sandstone, which preserves fine anatomical details with little apparent crushing, and in the number of articulated, semi-articulated, and associated skeletons. Identifications from the field and preliminary preparation show the Bentiaba mosasaur fauna is represented by at least five genera including Mosasaurus, Prognathodon, Globidens, Plioplatecarpus and Halisaurus. Collectively, these new specimens greatly expand our knowledge of the anatomy and systematics of Angolan mosasaurs.

Polcyn, M. W., Jacobs L. L., Schulp A. S., & Mateus O. (2007).  The mosasaurs of Angola. (Sternberg, Museum, Ed.).Second Mosasaur Meeting. 21., Hays, Kansas Abstract
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Polcyn, M. W., Jacobs L. L., Schulp A. S., & Mateus O. (2007).  The mosasaurs of Angola. Second Mosasaur Meeting. 21–21., Hays, Kansas Abstract
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Myers, T. S., Mateus O., Polcyn M. J., Vineyard D., & Jacobs L. L. (2016).  A new chelonioid turtle from the Paleocene of Cabinda, Angola. Journal of Vertebrate Paleontology, Program and Abstracts, 2016, p. 194.. 194. Abstract
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Adams, T. L., Polcyn M. J., Mateus O., Winkler D. A., & Jacobs L. L. (2010).  New occurrence of the long-snouted crocodyliform,Terminonaris cf.T. robusta, from Woodine Formation (Cenomanian) ot Texas. 52A., Jan Abstract

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Schulp, A., Mateus O., Polcyn M., & Jacobs L. (2006).  A new Prognathodon (Squamata : Mosasauridae) from the Cretaceous of Angola. JOURNAL OF VERTEBRATE PALEONTOLOGY. 26, 122A-122A., Jan Abstractschulp_et_al_2006.pdf

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Schulp, A. S., Polcyn M. J., Mateus O., Jacobs L. L., & Morais M. L. (2008).  A new species of Prognathodon (Squamata, Mosasauridae) from the Maastrichtian of Angola, and the affinities of the mosasaur genus Liodon. Proceedings of the Second Mosasaur Meeting, Fort Hays Studies Special Issue 3, Fort Hays State University, Hays, Kansas. 1-12. Abstractschulp_et_al_2008_prognathodon_kianda.pdf

Here we describe a new species of the mosasaurine genus Prognathodon from the Maastrichtian of Namibe, Angola, on the basis of five specimens which represent most of the cranial skeleton including the diagnostic quadrate. Phylogenetic analysis shows this new taxon, P. kianda nov. sp., to be the sister taxon to all other species of Prognathodon. It is unique amongst Prognathodon in possessing a high marginal tooth count and relatively small pterygoid teeth. The tooth morphology in the new taxon is reminiscent of some species of the genus Liodon, allowing association of Liodon-like dentition with otherwise Prognathodon-like crania, and thus resolves the long-standing question of the phylogenetic affinities of Liodon.

Schulp, A. S., Polcyn M. J., Mateus O., Jacobs L. L., & Morais M. L. (2008).  A new species of Prognathodon (Squamata, Mosasauridae) from the Maastrichtian of Angola, and the affinities of the mosasaur genus Liodon. Proceedings of the Second Mosasaur Meeting, Fort Hays Studies Special Issue 3, Fort Hays State University, Hays, Kansas. 1-12. Abstract
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