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On becoming cemented: evolutionary relationships among the genera in the freshwater bivalve family Etheriidae (Bivalvia: Unionoida)

By
Arthur E. Bogan
Arthur E. Bogan
1
North Carolina State Museum of Natural Sciences, Research Laboratory, 4301 Reedy Creek Road, Raleigh, NC 27607, USA (arthur.bogan@ncmail.net)
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Walter R. Hoeh
Walter R. Hoeh
2
Department of Biological Sciences, Kent State University, Kent, OH 44242, USA
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Published:
January 01, 2000

Abstract

A robust phylogeny for the Unionoida is emerging and presumed relationships of some major clades are being questioned. The Etheriidae or freshwater oysters has been a distinct family for over 160 years and currently contains three cemented genera: Acostaea (Columbia, South America), Pseudomulleria (India) and Etheria (Africa and Madagascar). Starobogatov (1970, Nauka, 1–372), Mansur and da Silva (1990, Amazoniana, 11(2), 147–166) and Bonetto (1997, Biociências, 5, 113–142) present conflicting testable hypotheses regarding the evolution of these taxa. Using cytochrome c oxidase subunit I DNA sequences the evolutionary relationships of these three genera has been examined, by comparing them to representatives of 30 other unionoid taxa from around the world. These analyses place Acostaea and Etheria within the Mycetopodidae while Pseudomulleria falls within the Unionidae. A monophyletic Etheriidae, composed of cemented freshwater bivalves, is not supported by the present analyses. Furthermore, the analyses indicate that cementation in the Unionida has evolved at least twice.

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Contents

Geological Society, London, Special Publications

The Evolutionary Biology of the Bivalvia

E. M. Harper
E. M. Harper
Cambridge University, UK
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J. D. Taylor
J. D. Taylor
The Natural History Museum, UK
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J. A. Crame
J. A. Crame
British Antarctic Survey, UK
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Geological Society of London
Volume
177
ISBN electronic:
9781862394254
Publication date:
January 01, 2000

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