View source for Extraumbilical-umbilical aperture

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==Definition==
*''according to Hottinger (2006):''
'''EXTRAUMBILICAL-UMBILICAL APERTURE''' -  an aperture located on the interior margin of the primary chamber of a coiled shell that extends from the umbilicus to the periphery.





==References==
Hottinger (2006), [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Illustrated glossary of terms used in foraminiferal research]. [http://paleopolis.rediris.es/cg/uk-index.html Carnets de Géologie], [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Memoir 2], ISSN 1634-0744               
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