The duplicature (thin layer of calcified material occurring around the inside margin of ostracod shells), only occurs in podocopes as far as I understand. It is often referred to as an important taxonomic character, but I cannot find information about its function. Specifically, might this structure be important for locking the valves shut?
Sobhi Helal
Dear Marissa
You are right, the function of the duplicature is supporting the tight closure of the valves. you can find details in the text books like that of Morkoven, the treatise of Moore, or microfossils of Brasier
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