New Whale Species Fossils Found in Hokkaido
New right Whale Species Discovered in Hokkaido Fossil Record
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Ancient Whale Unearthed in Sapporo
A previously unknown species of right whale has been identified from fossil remains discovered in Hokkaido,Japan. The bones were initially found by a local resident along the Toyohira River in Sapporo in October 2008, initiating a multi-year excavation project led by the Sapporo Museum activity Center.
Megabalaena sapporoensis: A New Branch on the Evolutionary Tree
Researchers have named the new species Megabalaena sapporoensis, translating to “big right whale of Sapporo.” A research article detailing the findings was published earlier this month in Palaeontologia Electronica, a peer-reviewed academic journal.
Analysis of the vertebrae and phalanges indicates the whale lived approximately 9 million years ago during the Late Miocene epoch. At an estimated 13 meters in length, M. sapporoensis was larger than its immediate ancestors but smaller than more distant relatives within the Balaenidae family-the family of right whales.
Filling a Critical Gap in the Fossil Record
The identification of megabalaena sapporoensis is meaningful because of the scarcity of right whale fossils from the period between 16 and 6 million years ago. According to Yoshihiro Tanaka,a curator at the Sapporo Museum Activity center and lead author of the study,the remarkably well-preserved bones “can fill in the major gap” in understanding the evolutionary history of these whales.
The unique bone structures of M. sapporoensis further solidified its classification as a distinct species.This discovery provides crucial insights into the advancement and diversification of right whales over millions of years.