Publications in the Year: 2009

Book Chapter

authors listed, N.  2009.  International Conference on the Geological Collections and Museums: mission and management., Jan. (Brandao J, Callapez P, Mateus O, Castro P, Ed.).: Journal of Paleontological Techniques 5 (special volume) Abstract
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Conference Paper

Tomas, C, Mateus O, Abreu C.  2009.  Dinolourinhã – a integração dos jovens na paleontologia: o caso-estudo do Museu da Lourinhã.. Journal of Paleontological Techniques 5: 28-29.. Abstract
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Mateus, O.  2009.  Dinolourinhã – a integração dos jovens na paleontologia: o caso-estudo do Museu da Lourinhã., 1. Journal of Paleontological Techniques. :28–29. Abstract
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Mateus, O.  2009.  DINOSAUR EGGSHELL AND EMBRYO LOCALITIES IN LOURINHA FORMATION, LATE JURASSIC, PORTUGAL, 1. Journal of Vertebrate Paleontology. 29:76A–76A. Abstract
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Mateus, O.  2009.  Colecções paleontológicas do Museu da Lourinhã (Portugal) / Paleontological collections of the Museum of Lourinhã (Portugal), 1. Journal of Paleontological Techniques. (Unknown Unknown, Ed.).:18–19.. Abstract
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Brandao, J., Callapez, P., O. Mateus, Castro, P (Eds.).  2009.  International Conference on the Geological Collections and Museums: mission and management. Abstract
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Tomas, C, Mateus O, Abreu C.  2009.  Dinolourinhã; a integração dos jovens na paleontologia: o caso-estudo do Museu da Lourinhã, Jan. Journal of Paleontological Techniques 5: 28-29.. :28-29. Abstracttomas_et_al_2009_dinolourinha_abstracts_jpt.pdf

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Conference Proceedings

Vineyard, DP, Jacobs LL, Polcyn MJ, Mateus O, Schulp AS, Strganac C.  2009.  Euclastes from the Maastrichtian of Angola and the distribution of the Angolachelonia. Eugene Gaffney Turtle Symposium. , Royal Tyrrell Museum
Castanhinha, R, Araújo R, Mateus O.  2009.  Dinosaur eggshell and embryo localities in Lourinhã Formation, Late Jurassic, Portugal. Journal of Vertebrate Paleontology, 29(3): . :76A. Abstractcastanhinhaetal2009dinosaureggshellp.pdf

Four different localities from the Late Jurassic of Lourinhã formation with eggshells and embryos were studied: Paimogo (lower Amoreira-Porto Novo member), Peralta (Praia Azul member), Porto das barcas (Bombarral member) and Casal da Rôla (Amoreira-Porto Novo member). All but Casal da Rôla have embryonic material. Preliminary results show that eggshells from Paimogo correspond to obliquiprismatic morphotype (0.92mm thick), similar to those from Morrison Formation. Within Paimogo site a different type of eggshell was discovered, having a radial section of 153 μm with a mammilary layer measuring 65 μm. Porto das Barcas eggshells represent a discretispherulitic morphotype (1,23 mm thick).
This locality presents a nest 60-cm diameter containing many eggshells but an indeterminate number of eggs. Some embryonic bones were discovered between the eggshells including teeth and skull bones showing that the eggs belong to a saurischian, tentatively a sauropod dinosaur. Peralta nest eggshells are preliminary ascribed to obliquiprismatic morphotype (column: 0,56mm and mammilla: 0,21mm) probably related to Paimogo’s nest taxon (Lourinhanosaurus). Peralta site bears embryonic bones namely small theropod teeth associated with bone fragments, and unidentifiable dinosaur vertebra. Only eggshells have been collected at Casal da Rôla (ML1194). The eggshells (0,78mm thick) are prismatic morphotype and it was impossible to determine the pore system, the outer surface is smooth with no ornamentation.
Lourinhã formation has the oldest sauropod and theropod nest with embryos known so far.

Journal Article

Castanhinha, R, Araujo R, Mateus O.  2009.  Dinosaur eggshell and embryo localities in Lourinhã Formation, Late Jurassic, Portugal. Journal of Vertebrate Paleontology. 29:76., Number 3 Abstract
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Araújo, R, Mateus O, Walen A, Christiansen N.  2009.  Preparation techniques applied to a stegosaurian Dinosaur from Portugal, Jan. Journal of Paleontological Techniques. 5:1-24. Abstractarajomateusetal2009.preparationtechn.pdfWebsite

General vertebrate paleontological techniques that have been used in the Museum of Lourinhã (Portugal) are presented here, in particular those applied to a stegosaurian dinosaur skeleton, Miragaia longicollum. A monolith jacket technique using polyurethane foam and plaster is presented. Mechanical preparation
techniques combining the use of an electric grinder and airscribes proved effective during the initial phases of preparation on well-preserved bone embedded in hard matrix. We also present a technique to mould monoliths in the early stages of preparation, creating a thin silicone rubber mould in several contiguous
parts. To mould and cast monoliths before removing individual bones has proven valuable for the preservation of taphonomic data and for display purposes. Polyurethane resin combined with plaster is useful for small casts, while polyester resin applied in four layers is the preferred technique for larger casts.
The four layers are composed of: a first thin layer of polyester resin with bone colour; followed by another layer of polyester resin of sediment colour and containing glass microspheres to make it thicker. The third layer is composed of fibre glass chopped strands, and the fourth is composed of fibre glass mats embedded
in plain polyester resin. 3D scanning and digitization techniques where tested for the storage of osteological information of individual bones and proved very promising.

Mateus, O.  2009.  New specimens of Angolasaurus bocagei and comments on the early radiations of plioplatecarpine mosasaurs. Journal of Vertebrate Paleontology, 1. Journal of Vertebrate Paleontology. 29:165A., Number 3: Taylor & Francis Abstract

NEW SPECIMENS OF ANGOLASAURUS BOCAGEI AND COMMENTS ON THE EARLY RADIATIONS OF PLIOPLATECARPINE MOSASAURS POLCYN, Michael, SMU, Dallas, TX, USA; JACOBS, Louis, SMU, Dallas, TX, USA; MATEUS, Octávio, Museu da Lourinhã, Lourinhã, Portugal; SCHULP, Anne, Natuurhistorisch Museum Maastricht, Maastricht, Netherlands New, well preserved material of the Turonian mosasaur Angolasaurus bocagei from the Tadi Beds of the Itombe Formation in northern Angola, allows detailed redescription of its morphology and reassessment of its phylogenetic relationships. Angolasaurus had been previously referred to the genus Platecarpus; however, phylogenetic analysis confirms the valid taxonomic status of A. bocagei, and reconstructs that taxon within a clade that also includes the genera Selmasaurus and Ectenosaurus. These forms are united by an elaborated infrastapedial process of the quadrate and a unique ridge-like descending process of the parietal forming the supraoccipital articulation, but also retain a relatively plesiomorphic configuration of the braincase. That clade is united with all other plioplatecarpines by a number of derived characters including the presence of a novel basicranial circulation pattern. In Africa, North and South America, early plioplatecarpines are known by the Middle Turonian and Angolasaurus and closely related forms appear by the Upper Turonian. Selmasaurus and Ectenosaurus are a rare faunal component of the Santonian and Campanian of North America. Platecarpus planifrons appears in the Coniacian of North America and represents the plesiomorphic condition of the clade containing the remaining species of Platecarpus and Plioplatecarpus, that appears in the Santonian and persist until the end of the Cretaceous, reaching global distribution. The temporal and geographic distribution of these radiations suggest influence of paleogeography and eustatic sea levels.

Mateus, O, Maidment S, Christiansen N.  2009.  A new long-necked 'sauropod-mimic' stegosaur and the evolution of the plated dinosaurs, Jan. Proceedings of the Royal Society of London B. 276:1815-1821. Abstractmateus_et_al_2009_stegosaur_miragaia_complete_with_suppl.pdfWebsite

Stegosaurian dinosaurs have a quadrupedal stance, short forelimbs, short necks, and are generally considered to be low browsers. A new stegosaur, Miragaia longicollum gen. et sp. nov., from the Late Jurassic of Portugal, has a neck comprising at least 17 cervical vertebrae. This is eight additional cervical vertebrae when compared with the ancestral condition seen in basal ornithischians such as Scutellosaurus.
Miragaia has a higher cervical count than most of the iconically long-necked sauropod dinosaurs. Long neck length has been achieved by ‘cervicalization’ of anterior dorsal vertebrae and probable lengthening of centra. All these anatomical features are evolutionarily convergent with those exhibited in the necks of
sauropod dinosaurs. Miragaia longicollum is based upon a partial articulated skeleton, and includes the only known cranial remains from any European stegosaur. A well-resolved phylogeny supports a new clade that unites Miragaia and Dacentrurus as the sister group to Stegosaurus; this new topology challenges the common view of Dacentrurus as a basal stegosaur.

Mateus, O.  2009.  The sauropod Turiasaurus riodevensis in the Late Jurassic of Portugal, 1. Journal of Vertebrate Paleontology. 29:144A., Number 3: Taylor & Francis Abstract

THE SAUROPOD DINOSAUR TURIASAURUS RIODEVENSIS IN THE LATE JURASSIC OF PORTUGAL MATEUS, Octávio, New University of Lisbon (CICEGe-FCT) & Museum of Lourinhã, Lisboa, Portugal A partial sauropod was found in 1996 in Vale Pombas, north of Lourinhã, Central West of Portugal, in the Lourinhã Formation, top of Amoreira Porto Novo member dated as c. 150 M.a. (Early Tithonian, Late Jurassic) and is currently housed at Museum of Lourinhã, in Portugal. The specimen (ML368) comprises a complete tooth with root, anterior chevron and almost complete right forelimb including partial scapula, complete coracoid, humerus, ulna, radius, metacarpals I, III and V, phalanx, and ungual phalanx I. It can be ascribed to Turiasaurus riodevensis, which was previously described from the Villar del Arzobispo Formation at Riodeva (Teruel, Spain). Characters shared with T. riodevensis holotype include: curvature and asymmetry of tooth crown, expansion of crown, outline of humerus, medial deflection of the proximal end of humerus, shape and prominence of deltopectoral crest, vertical ridge in the distal half of the ulna (considered as diagnostic of Turiasauria), configuration of metacarpals, and bone proportions. It differs from T. riodevensis holotype by the smaller size and the more rectangular ungual phalanx in lateral view. The sediments from which the Riodeva specimen was recovered were previsouly thought to be Tithonian to Berriasian in age. The presence of this species in Portugal, in beds confidently dated as Early Tithonian, may allow a more precise date for the Riodeva type locality of early Tithonian in age. The humerus of the Portuguese T. riodevensis is 152 cm long. Although shorter than the Spanish specimen (790 mm), it represents a large individual. All adult sauropods recovered in Portugal thus far are very large individuals: Dinheirosaurus (estimated body length is 20- 25 m), Lusotitan (humerus length estimated to be 205 cm), Lourinhasaurus (femur length: 174 cm), and Turiasaurus here reported. The lack of of small or medium adult body-size sauropods in the Late Jurassic of Portugal, suggests browsing niches thought to be occupied by smaller forms, could be have been available for other dinosaurs, like the long necked stegosaur Miragaia longicollum.

Mateus, O.  2009.  The sauropod Turiasaurus riodevensis in the the Late Jurassic of Portugal. Journal of Vertebrate Paleontology. 29:144–144., Number 3 Abstract
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Jacobs, LL, Mateus O, Polcyn MJ, Schulp AS, Scotese CR, Goswami A, Ferguson KM, Robbins JA, Vineyard DP, Neto AB.  2009.  Cretaceous paleogeography, paleoclimatology, and amniote biogeography of the low and mid-latitude South Atlantic Ocean, Jan. BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE. 180:333-341.: 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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Polcyn, MJ, Jacobs LL, Mateus O, Schulp AS.  2009.  New specimens of Angolasaurus bocagei and comments on the early radiations of plioplatecarpine mosasaurs. Journal of Vertebrate Paleontology. Journal of Vertebrate Paleontology. 29:165–165., Number 3 Abstract
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Mateus, O.  2009.  The sauropod Turiasaurus riodevensis in the the Late Jurassic of Portugal. Journal of Vertebrate Paleontology. 29:144., Number 3 Abstract
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Eberth, DA, Kobayashi Y, Lee YN, Mateus O, Therrien F, Zelenitsky DK, Norell MA.  2009.  Assignment of Yamaceratops dorngobiensis and Associated Redbeds at Shine Us Khudag (Eastern Gobi, Dorngobi Province, Mongolia) to the Redescribed Javkhlant Formation (Upper Cretaceous), Jan. Journal of Vertebrate Paleontology. 29:295-302.: Univ Nova Lisboa, Hokkaido Univ, Museu Lourinha, Amer Museum Nat Hist, Korean Inst Geosci & Mineral Resources, Royal Tyrell Museum, Royal Tyrell Museum, Univ Calgary Abstracteberth_et_al-2009-__assignment_of_yamaceratops_dorngobiensis_and_associated_redbeds_at_shine_us_khudag_eastern_gobi_dorngobi_province_mongolia_to_the_redescribed_javkhlant_formation_upper_cretaceous_javkhlant_fm.pdf

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Jacobs, LL, Mateus O, Polcyn MJ, Schulp AS, Scotese CR, Goswami A, Ferguson KM, Robbins JA, Vineyard DP, Neto AB.  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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Polcyn, M, Jacobs L, Mateus O, Schulp A.  2009.  New specimens of Angolasaurus bocagei and comments on the early radiations of plioplatecarpine mosasaurs. Journal of Vertebrate Paleontology. Journal of Vertebrate Paleontology. 29:165., Number 3 Abstract
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