Solemyoida

bivalve order

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In bivalve: Annotated classification
Order Solemyoida Shell valves equal and elongate, lacking hinge teeth, covered by a shiny periostracum; dimyarian or monomyarian; some with protobranch ctenidia containing symbiotic sulfur-oxidizing bacteria; minute palps; minute or absent gut; foot with flat sole; marginally papillate; marine; deep-burrowing; infaunal. About 35 species. Subclass Pteriomorphia
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