Daughter taxa (time control age-window is: 0-800Ma) | ||||
Muricohedbergella holmdelensis Final whorl chambers ovate, elongated, compressed; test almost planispiral. | ||||
Muricohedbergella monmouthensis Final whorl chambers inflated and rapidly increase in size; periphery distinctly lobulate . | ||||
Muricohedbergella sp. Specimens which cannot be assigned to established species |
Catalog entries: Hedbergella
Distinguishing features:
Parent taxon (Globanomalinidae): Hedbergellids - trochospiral, mostly low trochospiral. Apertures of earlier formed chambers remain visible around the umbilicus.
This taxon: Low to very low trochospiral. Chambers globular, 5-8 in final whorl. Umbilicus small & deep.
Aperture low to high arch, with narrow lip.
Normal perforate wall, smooth to heavily pustulose, nonspinose.
Geological Range:
Last occurrence (top): at top of P0 zone (100% up, 66Ma, in Danian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within R. calcarata zone (75.06-75.91Ma, base in Campanian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Brönnimann, P. & Brown, N. K. (1958). Hedbergella, a new name for a Cretaceous planktonic foraminiferal genus. Journal of the Washington Academy of Sciences. 48: 15-17. gs Gandolfi, R. (1942). Ricerche micropaleontologiche e stratigraphfiche sulla Scaglia e sul flysch Cretacici dei Dintorni di Balerna (Canton Ticino). Rivista Italiana di Paleontologia. 48: 1-160. gs Huber, B. T. & Leckie, R. M. (2011). Planktic foraminiferal species turnover across deep-sea Aptian/Albian boundary sections. Journal of Foraminiferal Research. 41: 53-95. gsReferences:
Muricohedbergella compiled by the pforams@mikrotax project team viewed: 19-9-2024
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