Daughter taxa (time control age-window is: 0-800Ma) | ||||
Cribrohantkenina inflata Hantkeninids with one of more areal apertures in addition to the primary aperture in the final adult chamber(s). Often very large (tests can be >1.0 mm). | ||||
Cribrohantkenina sp. Specimens which cannot be assigned to established species |
Catalog entries: Cribrohantkenina, Hantkenina (Cribrohantkenina)
Distinguishing features:
Parent taxon (Hantkeninidae): Planispiral, wall smooth
This taxon: Final chambers with tubulospines and areal apertures
Morphology:
[Coxall & Pearson 2006]
Wall type:
Most likely ancestor: Hantkenina - at confidence level 4 (out of 5). Data source: Coxall & Pearson 2006.
Geological Range:
Last occurrence (top): at top of E16 zone (100% up, 33.9Ma, in Priabonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within E14 zone (35.89-37.99Ma, base in Bartonian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Primary source for this page: Coxall & Pearson 2006 - Eocene Atlas, chap. 8, p. 225
Barnard, T. (1954). Hantkenina alabamensis Cushman and some related forms. Geological Magazine. 91(5): 384-390. gs Blow, W. H. (1969). Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils, Geneva, 1967. E J Brill, Leiden 380-381. gs Blow, W. H. (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden. 2: 1-1413. gs Coxall, H. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of the Hantkeninidae (Clavigerinella, Hantkenina and Cribrohantkenina). In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication . 41(Chap 8): 213-256. gs O Howe, H. V. (1928). An observation on the range of the genus Hantkenina. Journal of Paleontology. 2(1): 13-14. gs Spraul, G. L. (1963). Current status of the upper Eocene foraminiferal guide fossil, Cribrohantkenina. Journal of Paleontology. 37(2): 366-370. gs Thalmann, H. E. (1942). Foraminiferal genus Hantkenina and its subgenera. American Journal of Science. 240: 809-820. gs References:
Cribrohantkenina compiled by the pforams@mikrotax project team viewed: 12-11-2024
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