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Registros recuperados: 13
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A Late Cretaceous gastropod homing scar (possibly ichnogenus Lacrimichnus) from southern Limburg, The Netherlands Naturalis
Jagt, J.W.M..
An isolated gastropod homing scar, etched into an arcoscalpelline (cirripede) scutum, is recorded from the upper Nekum Member (Maastricht Formation, upper Maastrichtian) at the ENCI-HeidelbergCement Group quarry. This trace may be assignable to the ichnogenus Lacrimichnus Santos, Mayoral & Muñiz, that comprises etching scars produced by Neogene calyptraeid and/or capulid gastropods and ostreid bivalves from southern Spain and Portugal. However, it differs from both ichnospecies currently contained in that ichnogenus, L. bonarensis and L. cacelensis, in showing a relatively deep depression around the rim, irregularly distributed pit- and slit-like depressions, and an irregularly subcircular outline. Despite the wealth of available hard substrates...
Tipo: Article / Letter to the editor Palavras-chave: Trace fossil; Homing scar; Gastropoda; Lacrimichnus; Cirripedia; Upper Cretaceous; Maastrichtian; The Netherlands; 38.22; 42.73.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/217413
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A new Cretaceous terrestrial ecosystem from Gondwana with the description of a new sauropod dinosaur Anais da ABC (AABC)
Calvo,Jorge O.; Porfiri,Juan D.; González-Riga,Bernardo J.; Kellner,Alexander W.A..
A unique site at the northern area of Patagonia (Neuquén, Argentina) reveals a terrestrial ecosystem preserved in a detail never reported before in a Late Cretaceous deposit. An extraordinary diversity and abundance of fossils was found concentrated in a 0.5 m horizon in the same quarry, including a new titanosaur sauropod, Futalognkosaurus dukei n.gen., n.sp, which is the most complete giant dinosaur known so far. Several plant leaves, showing a predominance of angiosperms over gymnosperms that likely constituted the diet of F. dukei were found too. Other dinosaurs (sauropods, theropods, ornithopods), crocodylomorphs, pterosaurs, and fishes were also discovered, allowing a partial reconstruction of this Gondwanan continental ecosystem.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dinosauria; Titanosauria; Ecosystem; Taphonomy; Upper Cretaceous; Gondwana; Patagonia; Argentina.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000300013
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A new palm trunk from the Upper Cretaceous of Argentina Ameghiniana
Ottone,Eduardo G..
A new morphospecies of palm trunk, Palmoxylon pichaihuensis sp. nov., is proposed on the basis of several specimens recovered from a succession of tuffs and breccias at Pichaihue, Neuquén Province, Argentina. The specimens comprise atactosteles that display densely crowded fibrovascular bundles in the peripheral zone, and less congested fibrovascular bundles, randomly scattered or arranged in irregular circles in the central zone; sclerenchyma reniform; xylem with 1-4 large metaxylem vessels and 6-12 smaller protoxylem elements in the central zone, and an f/v ratio of 1.3-2:1. The Pichaihue fossil assemblage is similar to, and probably coeval with the flora of Bajo de Santa Rosa, Río Negro Province, reflecting a warm and relatively humid climate, at ca....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Palm; Upper Cretaceous; Argentina.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142007000400007
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A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Upper Cretaceous of Shandong, China Anais da ABC (AABC)
ZHANG,JIALIANG; WANG,XIAOLIN; WANG,QIANG; JIANG,SHUNXING; CHENG,XIN; LI,NING; QIU,RUI.
ABSTRACT A new saurolophine hadrosaurid, Laiyangosaurus youngi gen. et sp. nov. is described and phylogenetically analyzed based on several cranial elements from the Jingangkou Formation, Wangshi Group, Upper Cretaceous of Laiyang, Shandong, China. Laiyangosaurus youngi differs from other members of the saurolophine clade on the basis of a number of autapomorphies, including a prominent and narrow ridge on the lateral side of the nasal which forms the posterodorsal and posterior margin of the circumnasal depression, a primary ridge that runs along most of the maxillary tooth row that is slightly deflected posteriorly, a retroarticular process of the surangular that is dorsolateroposteriorlly recurved, and orbital margins that are wider than the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Upper Cretaceous; Wangshi Group; Laiyangosaurus youngi; Saurolophinae; Shandong; China.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400503
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A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described for the family Baurusuchidae Pap. Avulsos de Zool. (São Paulo)
Nascimento,Paulo Miranda; Zaher,Hussam.
The present work describes a new species of Baurusuchidae from Upper Cretaceous sediments of the Bauru Basin, and provides the first complete postcranial description for the family. Many postcranial features observed in the new species are also present in other notosuchian taxa, and are thus considered plesiomorphic for the genus. These are: long cervical neural spines; robust deltopectoral crest of the humerus; large proximal portion in the radiale that contacts the ulna; ulnare anterior distal projection; supra-acetabular crest well developed laterally; post-acetabular process posterodorsally deflected; presence of an anteromedial crest in the femur; fourth trocanter of femur posteriorly positioned; tibia with a laterally curved shaft; calcaneum tuber...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Upper Cretaceous; Baurusuchidae; Baurusuchus; Morphology; Postcranium.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492010002100001
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Baalsaurus mansillai gen. et sp. nov. a new titanosaurian sauropod (Late Cretaceous) from Neuquén, Patagonia, Argentina Anais da ABC (AABC)
CALVO,JORGE O.; RIGA,BERNARDO GONZALEZ.
Abstract We describe a dentary of a new titanosaur sauropod, Baalsaurus mansillai, gen. et sp. nov. from the Late Cretaceous of Patagonia, Argentina. The material comes from the Portezuelo Formation, Neuquén Group. Titanosaur sauropods lower jaws are scarce and only nine taxa with dentaries have been described. There are two types of morphology in titanosaur dentaries; “L” shaped or “U” shaped based on the shape, without a phylogenetic issue. In this paper; we recognize a new taxa, Baalsaurus mansillai, represented by an “L” shaped dentary with three apomorphic characters that are not present in other taxa: dentary alveoli with 10 teeth in the anterior ramus, a ventrally and anteriorly inclined symphysis and a wide ventral Meckelian groove surrounded by a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Argentina; Dinosauria; Neuquén; Sauropoda; Upper Cretaceous.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400506
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First record of Acanthocephala parasites eggs in coprolites preliminary assigned to Crocodyliformes from the Adamantina Formation (Bauru Group, Upper Cretaceous), São Paulo, Brazil Anais da ABC (AABC)
CARDIA,DANIEL F.F.; BERTINI,REINALDO J.; CAMOSSI,LUCILENE G.; LETIZIO,LUIZ A..
Abstract Abstract: This study presents the oldest record of Acanthocephala parasite eggs in coprolites preliminary assigned to Crocodyliformes, recovered in the region of Santo Anastácio Municipality, Southwestern São Paulo State. For this, a paleoparasitological investigation was carried out on 53 mineralized coprolites (complete or fragmented), with round shape or cylindrical shape of rounded or pointed ends, 0.2 - 3.9 cm in length x 0.1 - 2.4 cm in diameter, 3.7 grams in weight, and absence of food remains. Individual samples of the surface and internal portions of each coprolite were extracted by electric drill, dissociated with Cloridic Acid 10% solution, washed with Distilled Water, and filtered in granulometric screen Mesh / Tyler 325. After...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acanthocephala; Bauru Group; Crocodylomorpha; Helminth eggs; Upper Cretaceous.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400508
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Late Cretaceous bourgueticrinid crinoids from southern Poland – preliminary observations Naturalis
Jagt, J.W.M.; Salamon, M.A..
Dissociated skeletal elements of bourgueticrinid crinoids, comprising mostly columnals, radicular cirri, a few cups and some brachials, are recorded from Turonian-Maastrichtian strata of southern Poland (Miechów Trough, Kraków-Cze˛stochowa Upland, Holy Cross Mountains and Opole Trough). Published records of bourgueticrinids from Poland are surprisingly few; only specifically indeterminate columnals, radicular cirri and a sole proximale, plus a single cup of Bourgueticrinus utriculatus have been noted. The present material, although limited, clearly demonstrates that these crinoids must have been less rare than anticipated and are, in fact, distributed throughout the entire Upper Cretaceous sequence in this area. The majority of bourgueticrinids had an...
Tipo: Article / Letter to the editor Palavras-chave: Crinoidea; Bourgueticrinidae; Upper Cretaceous; Southern Poland; 38.22; 42.72.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/217415
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Paleoenvironment of the Auca Mahuevo and Los Barreales sauropod nesting-sites (Late Cretaceous, Neuquén Province, Argentina) Ameghiniana
Garrido,Alberto C..
Outcrops of Anacleto Formation at Auca Mahuevo nesting site (Neuquén Province, Argentina) can be divided into two main sections. The lower section (51 m), exhibits a succession of point bar, levee, crevasse channel and crevasse splay deposits, typifing a fine-grained, mixed load, meandering fluvial system. Twenty five km toward south (Los Barreales locality) these deposits become progressively to distal floodplain facies. Egg-layers are exposed along this 25 km, however a higher concentration of egg-clutches occur into paleosols and abandoned channel deposits developed at ancient levee and meander belt areas. Lithofacial evidences allow attributing for this lower section semiarid climatic condition, with marked alternations of wet and dry seasons....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacleto Formation; Upper Cretaceous; Neuquén Basin; Paleoenvironment; Dinosaur nesting-sites.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000100007
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Predation bite-marks on a peirosaurid crocodyliform from the Upper Cretaceous of Neuquén Province, Argentina Ameghiniana
Fiorelli,Lucas Ernesto.
Bite marks and injuries caused by intraspecific predation or aggressive social behavior are un-common in fossil vertebrates, and in the fossil record of suchian archosaurs they are extremely unusual. A peirosaurid crocodyliform collected from the Upper Cretaceous beds of the Neuquén Group (northern Patagonia, Argentina) shows abundant bite marks and injuries. These injuries are spread across all the preserved parts of the specimen, with the highest concentration of bite marks, perforations and breakage in the caudal region. Characteristics of these injuries are analyzed, and their possible origin and related taphonomic aspects are assessed. Results indicate that the injuries were not produced by intraspecific fighting, but probably by the predating action...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bite marks; Predation; Peirosaurid; Upper Cretaceous; Neuquén.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000300009
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[Proceedings of the 5th Symposium on Mesozoic and Cenozoic Decapod Crustaceans, Krakow, Poland, 2013: A tribute to Pál Mihály Müller / R.H.B. Fraaije, M. Hyžný, J.W.M. Jagt, M. Krobicki & B.W.M. van Bakel (eds.)]: Dynomenid crabs (Decapoda, Brachyura) and stalked barnacles (Cirripedia, Scalpelliformes) from upper Cenomanian-lower Turonian nearshore, shallow-water strata in the Bohemian Cretaceous Basin, Czech Republic Naturalis
Kočová Veselská, M.; Kočí, T.; Kubajko, M..
Crustacea (dynomenid crabs and cirripedes) from the upper Cenomanian-lower Turonian nearshore, shallow-water bioclastic limestones to marly siltstones found along the southern and eastern margins of the Bohemian Cretaceous Basin (BCB) are described. Crabs are rather rare in this area, and mostly restricted to fragmentary pereiopods, i.e., isolated claws or dactyli. In view of the confused taxonomy of isolated claws, their proper identity could not be determined; they were mostly referred to the necrocarcinid genus Necrocarcinus Bell, 1863. A recent re-examination of material deposited in the collections of the National Museum (Národní Muzeum, Prague), and of new finds, has revealed that all allegedly necrocarcinid pereiopods and nearly all carapaces from...
Tipo: Article / Letter to the editor Palavras-chave: Dromioidea; Graptocarcininae; Thoracica; Upper Cretaceous; Palaeoecology; 42.74; 38.22.
Ano: 2014 URL: http://www.repository.naturalis.nl/record/523864
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The oldest lower Upper Cretaceous plesiosaurs (Reptilia, Sauropterygia) from southern Patagonia, Argentina Ameghiniana
O'Gorman,José Patricio; Varela,Augusto Nicolás.
Plesiosaurs are recorded for the first time from the lower section of Mata Amarilla Formation, Santa Cruz Province, Patagonia, Argentina. The stratigraphic succession consists of mudstones and siltstones interbedded with medium to finegrained sandstone, deposited in a littoral environment during the Cenomanian-Santonian; therefore the material is the oldest record of plesiosaurs from the lower Late Cretaceous rocks of Argentina. The remains include teeth, some vertebrae, and one propodium assigned to Elasmosauridae indet. and Plesiosauria indet. The status of Polyptychodon patagonicus Ameghino, 1893, as well as its stratigraphic position are discussed, leading to the conclusion that the material described by Ameghino is probably from the Mata Amarilla...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plesiosaurs; Mata Amarilla Formation; Upper Cretaceous; Santa Cruz; Argentina.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000400003
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Un plesiosaurio de cuello corto (Plesiosauroidea, Polycotylidae) del Cretácico Superior del norte de Patagonia Ameghiniana
Salgado,Leonardo; Parras,Ana; Gasparini,Zulma.
Se describen vértebras de un plesiosaurio halladas en la Formación Allen (Campaniano tardíoMaastrichtiano temprano; Cretácico Superior), en la localidad de Loma Puntuda, Salitral de Santa Rosa, Provincia de Río Negro, Argentina. Una serie de características anatómicas, tales como los centros vertebrales anficélicos más altos que largos, la presencia de un anillo rodeando la cara articular posterior de las vértebras cervicales, la existencia de una quilla ventral en las vértebras cervicales, las espinas neurales cervicales expandidas distalmente y posiblemente inclinadas hacia atrás, así como las caras laterales de los cuerpos dorsales fuertemente comprimidas, justifican la asignación a los Polycotylidae, un grupo de plesiosauroideos de cuello corto...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plesiosauria; Polycotylidae; Provincia de Río Negro; Campaniano-Maastrichtiano; Cretácico Superior; Plesiosauria; Polycotylidae; Río Negro Province; Campanian-Maastrichtian; Upper Cretaceous.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142007000200007
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