Description of the first lithostrotian titanosaur embryo in ovo with Neutron characterization and implications for lithostrotian Aptian migration and dispersion

The Molí del Baró-1 site, a diverse fossil assemblage from the uppermost Maastrichtian of the southern Pyrenees (north-eastern Iberia)

“…During summers 2002, 2007and 2011, the site was excavated by a team composed by members of the Museu de la Conca Dell a and the Institut Catal a de Paleontologia Miquel Crusafont (formerly Institut de Palentologia de Sabadell), as well as a number of local and foreign volunteers. The 2002 and 2007 fieldworks were focused on the search for dinosaur bones, although several plant fossils, small teeth and bones belonging to other clades were also collected.…”

“…Unidentified, small bone fragments represent the 50e75% of the bone sample from levels '2' and '3' collected during the 2010 and 2011 campaigns. Eggshell fragments from these horizons were collected by in situ picking up and , 2007and 2011). B, Sample collected in 'level 2' during 2010and 2011.…”

“…Eggshell fragments from these horizons were collected by in situ picking up and , 2007and 2011). B, Sample collected in 'level 2' during 2010and 2011. C, Sample collected in 'level 3' during 2010and 2011.…”

Taphonomical and palaeoecological investigation of the Late Cretaceous (Maastrichtian) Tuştea vertebrate assemblage (Romania; Haţeg Basin) - insights into a unique dinosaur nesting locality

“…We acknowledge that there is still a wide consensus that relates Megaloolithus-type eggs exclusively to titanosaurian sauropods, and the well-documented titanosaurian origin of at least some megaloolithid eggs (e.g., Chiappe et al, 1998Chiappe et al, , 2005Wilson et al, 2010;Grellet-Tinner et al, 2011) represents the frequently cited 'key evidence' against the idea that the Tuștea eggs were laid by the hadrosauroid Telmatosaurus. However, we note here that:…”

“…Furthermore, reports of megaloolithid eggs that include in ovo titanosaur embryos from the Early Cretaceous locality of Algui Ulaan Tsav in Mongolia (Grellet-Tinner et al, 2011) and the Late Cretaceous localities of Auca Mahuevo in Patagonia, Argentina (Chiappe et al, 1998(Chiappe et al, , 2005, as well as that of the co-occurrence of one titanosaur hatchling and megaloolithid eggs at Dholi Dungri in India (Wilson et al, 2010), allow confident association of certain megaloolithid eggshell types with titanosaurs. Currently, the Tuştea locality represents the only known co-occurrence of this oogenus with hadrosauroid hatchling remains, and was cited previously in support of the idea that megaloolithid eggs might have been also laid by hadrosauroids (e.g., Grigorescu et al, 1994, although this inference is still seen as controversial (Weishampel and Jianu, 2011).…”