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First data on dinosaur eggs and clutches from Pinyes locality (Upper Cretaceous, Southern Pyrenees) 41
Vila,Bernat; Jackson,Frankie; Galobart,Àngel.
We describe a new megaloolithid locality discovered near Coll de Nargó (Catalonia, northeastern Iberian Peninsula). Eggs at the Pinyes site occur within extensively developed, vertically-stacked paleosols of an alluvial system. Eight clutches were excavated and mapped and biological and taphonomic aspects recorded. Three-dimensional maps were constructed using a Trimble total station, supplementing traditional planview mapping to allow more accurate interpretation of egg and clutch distribution. The Megaloolithus siruguei eggs are compressed, presenting an ellipsoidal shape. The three-dimensional geometry of two large clutches suggests that the eggs were laid in shallow, bowl-shaped depressions. Tangential thin sections of eggshells also reveal abundant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Megaloolithidae; Eggs; Clutches; 3D reconstruction; Pyrenees; Excavated pits.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000100005
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Late Cretaceous Megaloolithid eggs from Salitral de Santa Rosa (Río Negro, Patagonia, Argentina): inferences on the titanosaurian reproductive biology 41
Salgado,Leonardo; Magalhaes Ribeiro,Claudia; García,Rodolfo A; Fernández,Mariela S.
Late Cretaceous eggs and eggshell fragments assigned to the oofamily Megaloolithidae from Salitral de Santa Rosa (Río Negro Province, northern Patagonia, Argentina) are studied and compared with other Patagonian specimens assigned to the same oofamily. Megaloolithids from Santa Rosa are nearly spherical (mean diameter 10-12 cm) and their eggshell surface is ornamented with hemispheric nodes 0.3-0.8 mm in diameter; pore openings are subcircular to polygonal, and their diameter varies between 0.1 and 0.32 mm. Eggshell thickness ranges from 1 to 2.6 mm. The eggshell is composed of fanshaped units that normally display diverging borders and arched accretionary lines. The megaloolithid eggs from Santa Rosa are associated, at least in some sites of the area, to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fossil eggs; Megaloolithidae; Late Cretaceous; Río Negro province; Patagonia; Argentina.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142009000400003
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The "Tustea Puzzle": hadrosaurid (Dinosauria, Ornithopoda) hatchlings associated with Megaloolithidae eggs in the Maastrichtian of the Hateg Basin (Romania) 41
Grigorescu,Dan.
Since 1991 when the coinciding occurrence of megaloolithid eggs and hatchlings of the hadrosaurid Telmatosaurus transsylvanicus was suggested by few limb bone remains found close to the first discovered eggs in the Hateg Basin, tens of eggs grouped in clutches together with neonate bones were unearthed within the place that become "Tustea nesting site". In the meantime the original vertical escarpment near the village of Tustea was leveled and converted into a horizontal platform. By their external characters and eggshell microstructure all the eggs belong to the Megaloolithus oogenus, closer to M. siruguei; similarly, all the baby remains whose state of preservation allows their taxonomic assignment belong to Telmatosaurus transsylvanicus, one of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dinosaur eggs; Megaloolithidae; Hatchlings; Hadrosaurids; Telmatosaurus; Maastrichtian; Hateg Basin; Romania.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000100006
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