Trends in Ecology & Evolution, Journal Year: 2025, Volume and Issue: unknown
Published: April 1, 2025
Language: Английский
The Journal of Comparative Neurology, Journal Year: 2025, Volume and Issue: 533(5)
Published: April 28, 2025
ABSTRACT Over the past two decades, increased accessibility to computed tomography (CT) scanners has greatly facilitated documentation of endocranium in numerous extinct theropod taxa. However, most these studies have focused on morphology mature individuals, thus changes or variation through ontogeny theropods remains largely unknown. The current study sheds light endocranial anatomy eutyrannosaurian tyrannosauroid, Gorgosaurus libratus , both an ontogenetic and evolutionary context. Based CT scans six braincases, including those recently discovered juvenile we virtually reconstruct describe for a growth series G. . Despite considerable skull architecture, relatively few occurred These include subtle increase length hindbrain region endocast inflation tympanic sinus diverticula adults relative juveniles. Among significant is decrease distinctiveness brain endocasts as mature. exhibit better defined cerebral hemispheres, optic lobes, cerebella than larger more individuals. This suggests closer correspondence between tyrannosaurids, indicating individuals provides accurate representation structure its regions displays mix basal archosaurian traits derived coelurosaurian traits. More primitive features large olfactory bulbs tracts, posteroventrally oriented long axis cerebrum, posteriorly positioned whereas prominent flexure, somewhat enlarged cerebellum that at least partially separates left right lobes. An understanding acquisition such leading avian may be further elucidated via (more reflective structure/organization various regions) earlier‐diverging (e.g., Allosauroidea, Megalosauroidea, Coelophysoidea).
Language: Английский
Citations
0
Trends in Ecology & Evolution, Journal Year: 2025, Volume and Issue: unknown
Published: April 1, 2025
Language: Английский
Citations
0