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A new species of Cythere (Ostracoda) from the middle Eocene McIntosh Formation, Doty Hills, Washington State, USA, and its significance for the evolutionary history of the genus

Tatsuhiko Yamaguchi and James L. Goedert
A new species of Cythere (Ostracoda) from the middle Eocene McIntosh Formation, Doty Hills, Washington State, USA, and its significance for the evolutionary history of the genus
Journal of Paleontology (July 2010) 84 (4): 709-719

Abstract

Cythere ikeyanoriyukii n. sp., an extant phytal ostracode genus, was obtained from the Middle Eocene McIntosh Formation in the Doty Hills, western Washington State, USA. It was associated with eleven taxa, which are extant phytal and shelfal genera such as Loxocorniculum, Xestoleberis, Ambostracon, Coquimba, and Acanthocythereis. The presence of Cythere in this assemblage is surprising and indicates that the first appearance of this genus was middle Eocene time at the latest, or at least 20 Ma earlier than previously thought. Cythere did not originate in the Pacific Ocean around Japan as previously thought, but instead must have migrated from the northeastern Pacific to the northwestern Pacific between middle Eocene and early Miocene time.


ISSN: 0022-3360
EISSN: 1937-2337
Coden: JPALAZ
Serial Title: Journal of Paleontology
Serial Volume: 84
Serial Issue: 4
Title: A new species of Cythere (Ostracoda) from the middle Eocene McIntosh Formation, Doty Hills, Washington State, USA, and its significance for the evolutionary history of the genus
Affiliation: Japan Society for the Promotion of Science, Japan
Pages: 709-719
Published: 201007
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 110
Accession Number: 2010-068301
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes 2 appendices
Illustration Description: illus. incl. 3 tables, sketch map
N46°40'60" - N46°40'60", W124°43'60" - W124°43'60"
Secondary Affiliation: University of Washington, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201037
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