Cranial cavity and anatomy and beluga whale cranial CT scans.

• Main Authors: David A. Waugh (4768380), J. G. M. Thewissen (11495416)
• Format: Still Image
• Language: unknown
• Published: 2021
• Subjects: Biophysics; Genetics; Neuroscience; Evolutionary Biology; Ecology; Biological Sciences not elsewhere classified; Physical Sciences not elsewhere classified; 5 million years; include additional data; body mass using; body mass alter; provide new data; fossil cetacean eq; relative brain size; brain size increased; cetaceans </ p; cetacean eq evolution; cetacean evolution; brain mass; size change; sample size; new dataset; extant cetaceans; early evolution; eq coincided; estimate brain; data show; xlink ">; terrestrial artiodactyls; sudden increase; skeletal proxy; single method; significant increase; scaling coefficients; previous works; perceived timing; oligocene transition; oligocene boundary; modern suborders; modern mammals; middle miocene; methods used; endocranial volume; encephalization quotient; direct proxy; Reinhardt; Beluga; Beluga whale; Beluga*
• Online Access: https://doi.org/10.1371/journal.pone.0257803.g001

(A), line drawing of a bisected bowhead skull (modified Eschricht and Reinhardt [ 74 ]); (B), Illustration of cranial cavity components including membranes surrounding the brain; C-D, coronal CT scan slices through the head of a beluga whale (NSB-DWM 2019LDL10); (C) section through the root of the zygomatic arch. (D) more caudal section through the paroccipital process.