We are pleased to announce the publication of the following paper in the
current issue of Paleontological Research:
A New Species of the Genus Eschrichtius (Cetacea: Mysticeti) from the
Early Pleistocene of Japan
Toshiyuki Kimura, Yoshikazu Hasegawa and Naoki Kohno
doi:10.2517/2017PR007
Abstract. The family Eschrichtiidae is presently only represented by
Eschrichtius robustus, a relict species from the North Pacific. Because
of the scarcity of fossil records of the Eschrichtiidae, their
evolutionary history is not well understood. A finely preserved
mysticete skeleton was recovered from the Lower Pleistocene (1.77–1.95
Ma) of Tokyo, Japan, in 1961. The fossil consists of a cranium,
mandibles, cervical, thoracic, lumbar and caudal vertebrae, chevrons,
ribs, and forelimb bones, including scapula, humerus, radius, ulna and
digit bones. Here, we describe and diagnose this fossil as a new species
of the Eschrichtiidae, Eschrichtius akishimaensis sp. nov. This is the
first fossil species of the genus Eschrichtius and suggests that at
least two lineages represented by the modern species of Eschrichtius and
the new species described here survived as late as the Early
Pleistocene. This expands our knowledge of the paleodiversity of the
eschrichtiids.
Key words: Early Pleistocene, Eschrichtiidae, Eschrichtius
akishimaensis, western North Pacific
Full text is available at:
http://www.bioone.org/doi/abs/10.2517/2017PR007
or upon e-mail request to [email protected]
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Toshiyuki KIMURA, Ph.D.
Assistant Curator
Gunma Museum of Natural History
1674-1 Kamikuroiwa, Tomioka
Gunma 370-2345, Japan
tel: +81-274-60-1200
fax: +81-274-60-1250
e-mail: [email protected]
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