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1 March 2010 First Data on Dinosaur Eggs and Clutches from Pinyes Locality (Upper Cretaceous, Southern Pyrenees)
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Abstract

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 plan-view 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 pores, consistent with incubation in a high humidity/ low oxygen environment. These data support previous inferences that M. siruguei eggs were buried in shallow pits.

©Asociación Paleontológica Argentina
Bernat Vila, Frankie Jackson, and Àngel Galobart "First Data on Dinosaur Eggs and Clutches from Pinyes Locality (Upper Cretaceous, Southern Pyrenees)," Ameghiniana 47(1), (1 March 2010). https://doi.org/10.5710/AMGH.v47i1.3
Received: 19 November 2008; Accepted: 5 September 2009; Published: 1 March 2010
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