[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Remembrance of the New Papers



Ameghiniana got a mention on this list. These are from the March edition, but I don't think they've been mentioned here yet...

Paulina-Carabajal, A. and Salgado, L. (2007). A titanosaur (Dinosauria, Sauropoda) braincase from the Upper Cretaceous of north Patagonia: description and contribution to the knowledge of the dinosaur inner ear. [Un basicraneo de titanosaurio (Dinosauria, Sauropoda) del Cretacico Superior del norte de Patagonia: descripcion y aportes al conocimiento del oido interno de los dinosaurios.] Ameghiniana 44: 109-120.

Abstract: "The braincase of a sauropod dinosaur from the Upper Cretaceous of Rio Negro, Argentina, is described. The material is assigned to the clade Titanosauria and some characters that resemble the condition present in the genus _Antarctosaurus_ such as the presence of short and wide frontals and parietals, supraoccipital knob lacking a medial groove, reduced and dorsally exposed supratemporal fenestrae, frontals fused on the midline, and a single interfrontal medial knob are discussed. These characters are not diagnostic and they can be found in other titanosaurs such as _Rapetosaurus_, _Nemegtosaurus_, _Saltasaurus_ and _Bonatitan_. The braincase, although incomplete, is well preserved, allowing the examination of certain delicate internal structures like the inner ear, which has been exposed through bone fractures. The titanosaurian inner ear is described here for the first time: it is morphologically similar to that of other sauropods such as _Diplodocus_ and _Brachiosaurus_, mainly in the spatial disposition of the semicircular canals, although showing a proportionally more robust lagena. The angle between the planes on which the anterior and posterior semicircular canals lie is greater than 909 degrees as in other herbivorous dinosaurs, and different from the theropod _Allosaurus_, where that angle is smaller."


Tauber, A.A. (2007). First finding of dinosaur eggs (Upper Cretaceous) in the La Rioja province, Argentina. [Primer yacimiento de huevos de dinosaurios (Cretacico Superior) de la provincia de La Rioja, Argentina.] Ameghiniana 44: 11-28.


Abstract: "Numerous sites containing dinosaur eggshells have been found in the Los Llanos Formation in the Sanagasta Valle, La Rioja Province, Argentina. The eggs were classified as _Sphaerovum erbeni_ Mones, corresponding to dinosaurs with a basic type of Dinosauroid-spherulite organization and a filisferulitic morphotype, belonging to the Faveoloolithidae Oofamily, similar to others reported previously in Uruguay and in the Rio Negro and La Pampa provinces, Argentina. The fossils were found in situ, although fragmented mainly due to the process of paedogenesis. The studied eggshells indicate a Campanian-Maastrichtian age, being the first fossils of the age in the Sierra de Velasco region."

_________________________________________________________________
Share your special parenting moments! http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us