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Palaeoconcha

plural noun
Palaeo·​con·​cha

Definition of Palaeoconcha

in some classifications
: a division of Protobranchia comprising simple extinct bivalve mollusks with thin shells and a primitive hinge and sometimes including also a few recent marine bivalves

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History and Etymology for Palaeoconcha

New Latin, from pale- + Latin concha conch

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