TY - GEN AU - Harper, Elizabeth M. AU - Checa, Antonio G PY - 2020 UR - http://hdl.handle.net/10481/64231 AB - An organic-rich columnar prismatic outer shell layer, which extends far beyond the underlying nacre, has allowed pterioid bivalves (the pearl oysters and their allies) to develop flexible valve margins, allowing a tight hermetic seal when shut. In... LA - eng PB - Spinger Heidelber TI - Tightly shut: flexible valve margins and microstructural asymmetry in pterioid bivalves DO - 10.1007/s00227-020-03693-y ER -