Extraumbilical aperture

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  • according to Hottinger (2006):

EXTRAUMBILICAL APERTURE - an aperture in the primary chamber of coiled shells situated at the interior margin but not connected with the umbilicus.


Hottinger (2006), Illustrated glossary of terms used in foraminiferal research. Carnets de Géologie, Memoir 2, ISSN 1634-0744

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