Osteology and Relationships of Byronosaurus jaffei (Theropoda: Troodontidae)

By P. Makovicky, M. Norell, James M. Clark, Timothy Rowe. 2003

112 citations recorded by the source corpus.

Abstract The troodontid Byronosaurus jaffei is known from two specimens from adjacent localities in the Nemegt basin, Ömnögov Aimag, Mongolia. These specimens are composed of well-preserved cranial material and fragmentary postcrania. All of these elements are described here. Byronosaurus jaffei is included in a comprehensive phylogenetic analysis of Coelurosauria to ascertain its relationships. Several interesting characters of Byronosaurus jaffei have implications both for theropod relationships and for understanding patterns of variation within coelurosaurian theropods. These include the position of a foramen that marks the exit of the supra-alveolar canal (which we suggest is homologous with the subnarial foramen), the flattened internarial bar, the unusual interfenestral bar, and the unserrated teeth. Additionally, the well-preserved braincase allows detailed comparison with other troodontid taxa.

Subfields: Nature and Landscape Conservation, Paleontology

View Paper: https://www.semanticscholar.org/paper/6574588bc465e1bda45da9304aa52f58fe62bf89

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nature and Landscape Conservation

In Paleontology

Citations in the corpus

A Review of Dromaeosaurid Systematics and Paravian Phylogeny (2012, methodology): “The holotype material is fragmentary and incomplete, rendering its exact phylogenetic position within Dromaeosauridae ambiguous.”
Cranial Kinesis in Dinosaurs: Intracranial Joints, Protractor Muscles, and Their Significance for Cranial Evolution and Function in Diapsids (2008, background): “Some maniraptorans (e.g., Saurornithoides, Byronosaurus [Makovicky et al., 2003]; Buitreraptor [Makovicky et al., 2005]) do indeed appear to have relatively thin nasal bones, suggesting the potential for a flexion zone within the nasals.”
Osteology of Cryolophosaurus ellioti (Dinosauria: Theropoda) from the Early Jurassic of Antarctica and implications for early theropod evolution (2007, background): “This notch is narrow and weakly Vshaped, but is not similar to the morphology present in most troodontids, where the basal tubera are extremely reduced and separated by a narrow, Vshaped notch (Makovicky et al., 2003).”
Embryos of therizinosauroid theropods from the Upper Cretaceous of China: diagnosis and analysis of ossification patterns (2007, background): “1972), while in troodontids the ventral parabasisphenoid recess is missing (Barsbold 1974; Currie 1985; Xu et al. 2002c; Makovicky et al. 2003).”
New information on Nqwebasaurus thwazi, a coelurosaurian theropod from the Early Cretaceous Kirkwood Formation in South Africa (2012, background): “, Byronosaurus [Makovicky et al., 2003]), and ornithomimosaurs (e.”
An Early Ostrich Dinosaur and Implications for Ornithomimosaur Phylogeny (2003, background): “The posterior part of this lamina, which forms the interfenestral bar, bears dorsal and ventral embayments along the posterior border, perhaps indicating some type of interfenestral connection as in troodontids (Norell et al., 2000; Makovicky et al., 2003).”
The distribution of dental features in non-avian theropod dinosaurs: Taxonomic potential, degree of homoplasy, and major evolutionary trends (2019, background): “…al., 2016), the microraptorines Microraptor (Xu et al., 2000; Pei et al., 2014) and IVPP V13476 (Xu and Li, 2016), and the troodontids Byronosaurus (Makovicky et al., 2003), Daliansaurus (Shen et al., 2017a), IVPP V20378, Jinfengopteryx (Ji et al., 2005), Gobivenator (Tsuihiji et al., 2014),…”