Georgescu, M.D. (2012). Evolutionary classification of the Late Cretaceous (Coniacian-Maastrichtian) planktic foraminifera Archaeoglobigerina Pessagno, 1967 and Gandolfia new genus/directional lineage. In: Bailey D.R., Howard S.E. (eds.), Deep-Sea: Marine Biology, Geology, and Human Impact. Nova Publishers, New York. 101-130.

452494

Georgescu, M.D.

2012

101-130

Publication

https://novapublishers.com/wp-content/uploads/2019/10/978-1-62257-173-4_ch3.pdf

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The genus Archaeoglobigerina Pessagno, 1967 is reviewed and redefined in evolutionary classification as branched lineage, which evolved in late Coniacian and became extinct in the late Maastrichtian. A new directional lineage, Gandolfia, is defined for the double keeled planktics of late Campanian-Maastrichtian age with plano-convex test and ornamentation that concentrated in chamber central portion on the spiral side. This attempt to develop an evolutionary classification framework for a group of globotruncanids planktic foraminifera is equally based on the test gross architecture features as well as on high resolution observations on the wall ultrastructure, ornamentation, and pore size and distribution patterns.

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