Catalog entries:
Distinguishing features:
Parent taxon (Igorina): Test small, biconvex, evolute, margin narrowly rounded or angular, sometimes with a keel; 5-6 chambers in final whorl
Wall, coarsely cancellate, praemuricate, often pustulose.
This taxon: Specimens which cannot be assigned to established species
Geological Range:
Last occurrence (top): at top of (100% up, 0Ma, in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source:
Plot of occurrence data:
Soldan, D. M., Petrizzo, M. R., Silva, I. P. & Cau, A. (2011). Phylogenetic relationships and evolutionary history of the Paleogene genus through parsimony analysis. Journal of Foraminiferal Research. 41: 260-284. gsReferences:
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Igorina sp. compiled by the pforams@mikrotax project team viewed: 30-4-2025
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