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

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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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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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

Mateus, O, Jacobs L, Polcyn M, Schulp AS, Vineyard D, Neto AB, Antunes MT.  2009.  The oldest African eucryptodiran turtle from the Cretaceous of Angola, Jan. Acta Palaeontologica Polonica. 54:581-588.: Univ Agostinho Neto, Univ Nova Lisboa, Museu Lourinha, Acad Ciencias Lisboa, Nat Hist Museum Maastricht, So Methodist Univ Abstractmateus_et_al_2009_the_oldest_african_angolachelys_angola_turtle.pdfWebsite

A new Late Cretaceous turtle, Angolachelys mbaxi gen. et sp. nov., from the Turonian (90 Mya) of Angola, represents the oldest eucryptodire from Africa. Phylogenetic analysis recovers Angolachelys mbaxi as the sister taxon of Sandownia harrisi from the Aptian of Isle of Wight, England. An unnamed turtle from the Albian Glen Rose Formation of Texas (USA) and the Kimmeridgian turtle Solnhofia parsonsi (Germany), are successively more distant sister taxa. Bootstrap analysis suggests those four taxa together form a previously unrecognized monophyletic clade of marine turtles, herein named Angolachelonia clade nov., supported by the following synapomorphies: mandibular articulation of quadrate aligned with or posterior to the occiput, and basisphenoid not visible or visibility greatly reduced in ventral view. Basal eucryptodires and angolachelonians originated in the northern hemisphere, thus Angolachelys represents one of the first marine amniote lineages to have invaded the South Atlantic after separation of Africa and South America.

Jacobs, LL, Polcyn MJ, Mateus O, Schulp AS, 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, Polcyn M, Mateus O, Schulp AS, Neto AB.  2009.  The Cretaceous Skeleton Coast of Angola, Jan. Journal of Vertebrate Paleontology. 29:121A. Abstractjacobs_et_al_2009cretaceousskeletoncoas.pdfWebsite

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Mateus, O, Maidment SCR, Christiansen NA.  2009.  A new long-necked {'}sauropod-mimic{'} stegosaur and the evolution of the plated dinosaurs. Proceedings of the Royal Society B: Biological Sciences. 276:1815-1821., Number 1663 Abstract
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Eberth, DA, Kobayashi Y, Lee Y-N, 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), mar. Journal of Vertebrate Paleontology. 29:295–302., Number 1: Informa {UK} Limited AbstractWebsite
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Castanhinha, R, Araujo R, Mateus O.  2009.  Dinosaur eggshell and embryo localities in Lourinhã Formation, Late Jurassic, Portugal. Journal of Vertebrate Paleontology. 29:76–76., Number 3 Abstract
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Mateus, O.  2009.  Preparation techniques applied to a stegosaurian Dinosaur from Portugal, 1. Journal of Paleontological Techniques. 5:1–24., Number NA 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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Mateus, O.  2009.  The sauropod dinosaur Turiasaurus riodevensis in the Late Jurassic of Portugal, Jan. Journal of Vertebrate Paleontology. 29:144A. Abstractmateus_2009_sauropod_dinosaur_turiasaurus_portugal_svp09abstractspdf.pdfWebsite

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.

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.