TY - JOUR AU - Vendrasco, Michael J. AU - Checa González, Antonio G. PY - 2015 SN - 1736-4728 SN - 1736-7557 UR - http://hdl.handle.net/10481/35706 AB - Mackinnonia davidi from the Cambrian (Series 2) of Australia has a prismatic outer shell layer and, as newly described here, a calcitic semi-nacre inner layer. The pattern is the same as in stenothecids such as Mellopegma, providing more evidence for... LA - eng KW - Cambrian KW - Helcionellid KW - Mollusca KW - Mackinnonia KW - Australia KW - Shell microstructure KW - Biomineralization TI - Shell microstructure and its inheritan ce in the calcit ic helcionellid Mackinnonia ER -