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Fordilla troyensis Barrande: The oldest known pelecypod

Science

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Abstract

Specimens of the small bivalved animal Fordilla troyensis Barrande from New York State show that this fossil is the oldest known pelecypod mollusk and not a conchostracan arthropod. This finding extends the range of the class Pelecypoda backward in time from the Early Ordovician (about 495 million years ago) to the Early Cambrian (about 540 to 570 million years ago). The morphology of Fordilla troyensis suggests that it lived infaunally and that it was ancestral to the pelecypod subclasses Heteroconchia and Isofilibranchia.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Fordilla troyensis Barrande: The oldest known pelecypod
Series title:
Science
Volume
180
Issue:
4088
Year Published:
1973
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
866
Last page:
868