protegulal node

protegulal node
(BRACHIOPODA)
The apical area of the adult shell; site of protegulum and further growth to brephic stage.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • costa — n.; pl. costae [L. costa, rib] 1. Any rib like structure. 2. (ARTHROPODA: Crustacea) Any thickened portion of the peniferum of ostracods. 3. (ARTHROPODA: Insecta) a. The longitudinal wing vein of certain insects, forming the anterior margin of… …   Dictionary of invertebrate zoology

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