File:Megabalaena (reconstructed skeleton).png

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English: Images based on a 3D model showing preserved elements in brown of SMAC 2731, Megabalaena sapporoensis in dorsal view (A) and left lateral view (B). Missing parts were created by T. Shinmura refer to extant balaenids NMNS-M55028 and MTUF-M061A both Eubalaena japonica. The vertebrae posterior to the ninth thoracic vertebra are difficult to identify because of their limited preservation. Ribs separated into over 100 fragments. These elements' original positions are uncertain and roughly estimated based on their morphologies and the extant species Eubalaena glacialis.
Date
Source "A new member of a large and archaic balaenid from the Late Miocene of Sapporo, Hokkaido, Japan partly fills a gap of right whale evolution"
Author Y. Tanaka, T. Kimura, T. Shinmura, H. Ohira & H. Furusawa

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21 August 2025

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