Morphology of the Petrosal in Late Miocene Baleen Whales of Northwestern Ciscaucasia

Morphological features of the membranous labyrinth in extinct and extant baleen whales and their ancestors are discussed. The tomography of the membranous labyrinth of two species of Late Miocene baleen whales from Adygea has shown that Kurdalagonus, Zygiocetus, and Cetotherium have a comparable num...

Full description

Saved in:
Bibliographic Details
Published in:Paleontological journal 2018-12, Vol.52 (12), p.1440-1444
Main Authors: Tarasenko, K. K., Kovalenko, E. S., Kaloyan, A. A., Podurets, K. M.
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Marine mammals
Paleontology
Tomography
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Morphological features of the membranous labyrinth in extinct and extant baleen whales and their ancestors are discussed. The tomography of the membranous labyrinth of two species of Late Miocene baleen whales from Adygea has shown that Kurdalagonus, Zygiocetus, and Cetotherium have a comparable number of cochlear turns with representatives of herpetocetins, i.e., about three turns. Representatives of the genus Kurdalagonus differ from Zygiocetus in the structure of semicircular canals, the longer crus commune (much shorter in Zygiocetus ), and in the size of the ampulla of the lateral semicircular canal. In addition, representatives of the genus Kurdalagonus differ from Zygiocetus and Cetotherium in the structure of the round window, which is much wider and has a more rounded shape.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030118120195