Although nonavian theropod have received considerable interest in the last years, their ontogeny still remains poorly understood, especially the ontogenetical changes affecting their skull (Rauhutand Fechner, 2005). The quadrate, for instance, is preserved in several embryos and juvenile specimens belonging to many clades of theropods such as the Tyrannosauridae (Carr, 1999), Compsognathidae (Dal Sasso and Maganuco, 2011), Therizinosauroidea (Kúndrat et al., 2007), Oviraptoridae (Norell et al., 1994; Norell et al., 2001; Weishampel et al., 2008) and Troodontidae (Varrichio et al., 2002) but very little is usually said about the anatomy of this bone and no one has ever investigated ontogenetical variation in the nonavian theropod quadrate. The discovery of two quadrates belonging to embryos of the sinraptorid Lourinhanosaurus antunesi from Portugal and ﬁve isolated quadrates pertaining to juvenile, subadult and adult specimens of Spinosauridae from Morocco ﬁlls this gap and allows some ontogenetic information to be drawn for this bone in these two speciﬁc clades of Theropoda.
|Title of host publication||Fundamental!|
|Publication status||Published - 1 Jan 2012|
|Event||10th Annual Meeting of the European Association of Vertebrate Paleontologist - |
Duration: 1 Jan 2012 → …
|Conference||10th Annual Meeting of the European Association of Vertebrate Paleontologist|
|Period||1/01/12 → …|