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A new genus and species of Thyasiridae (Mollusca, Bivalvia) from deep-water, Beaufort Sea, northern Alaska.

Authors
Type
Published Article
Journal
ZooKeys
1313-2970
Publisher
Pensoft Publishers
Publication Date
Issue
462
Pages
11–26
Identifiers
DOI: 10.3897/zookeys.462.6790
PMID: 25589851
Source
Medline
Keywords
  • Alaska
  • Arctic Ocean
  • Axinus
  • Beaufort Sea
  • Bivalvia
  • Maorithyas
  • Mollusca
  • Parathyasira
  • Spinaxinus
  • Thyasiridae
  • Wallerconcha
  • Chemoautotrophic
  • Endosymbiosis
  • Taxonomy

Abstract

Bivalve mollusk shells were collected in 2350 m depth in the Beaufort Sea, Arctic Ocean off northern Alaska. Initial identification suggested the specimens were a member of the bivalve family Thyasiridae, but no known eastern Pacific or Arctic living or fossil thyasirid resembled these deep-water specimens. Comparisons were made with the type of the genera Maorithyas Fleming, 1950, Spinaxinus Oliver & Holmes, 2006, Axinus Sowerby, 1821, and Parathyasira Iredale, 1930. We determined the Beaufort Sea species represents a new genus, herein described as Wallerconcha. These specimens also represent a new species, herein named Wallerconchasarae. These new taxa are compared with known modern and fossil genera and species of thyasirds.

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