Daughter taxa (time control age-window is: 0-800Ma) | ||||
final chambers (sub)triangular | ||||
Hantkenina nanggulanensis Final 1-2 chambers globular, test large (up to 0.47 mm) | ||||
Hantkenina alabamensis Final 1-2 chambers laterally inflated, coiling compact and involute, tubulospines forward leaning. | ||||
Hantkenina primitiva Like H. compressa but tubulospines absent on early adult chambers and test generally smaller. | ||||
Hantkenina compressa Final chambers triangular, with nearly continuous peripheral outline; tubulospines in the trans-sutural position and with forward-inclined orientation. | ||||
Hantkenina australis Species showing features of H. dumblei and H. compressa, but unique in having posteriorly recurved tubulospines. | ||||
Hantkenina dumblei Final chambers triangular, with nearly continuous peripheral outline, tubulospines in anterior (near sutural) position. | ||||
final chambers elongate | ||||
Hantkenina lehneri Final chambers elongate with tubulospines in forward position; peripheral outline distinctly stellate. 5-6 chambers in the final whorl. | ||||
Hantkenina liebusi Like H. mexicana but with more compressed test, less stellate peripheral outline, and tubulospines in a more forward position. 4½-6 chambers in the final whorl. | ||||
Hantkenina mexicana Final chambers elongate; tubulospines centrally positioned; peripheral outline distinctly stellate. 4-5 chambers in the final whorl. | ||||
Hantkenina singanoae Final chambers very elongate with rudimentary terminal cylindrical extensions, but lacking true tubulospines. 4-5 chambers in the final whorl. | ||||
Hantkenina sp. Specimens which cannot be assigned to established species |
[Coxall & Pearson 2006]
Catalog entries: Hantkenina
Distinguishing features:
Parent taxon (Hantkeninidae): Planispiral, wall smooth
This taxon: Final chambers with tubulospines
Morphology:
[Coxall & Pearson 2006]
Wall type:
Isotope paleobiology
Phylogenetic relations
Most likely ancestor: Clavigerinella - at confidence level 4 (out of 5). Data source: Coxall & Pearson 2006; .
Likely descendants: Cribrohantkenina;
plot with descendants
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 E8 zone (43.85-45.72Ma, base in Lutetian 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. 229
Bermudez, P. J. (1937b). Nuevas especies de Foraminiferos del Eoceno de Cuba. Memorias de la Sociedad Cubana de Historia Natural “Felipe Poey”. 11: 137-150. 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 Brönnimann, P. (1950b). The Genus Hantkenina Cushman in Trinidad and Barbados, B. W. I. Journal of Paleontology. 24(4): 397-420. 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 Coxall, H. K., Pearson, P. N., Shackleton, N. J. & Hall, M. A. (2000). Hantkeninid depth adaptation: An evolving life strategy in a changing ocean. Geology. 28: 87-90. gs Coxall, H. K., Huber, B. T. & Pearson, P. N. (2003). Origin and morphology of the Eocene planktonic foraminifera Hantkenina. Journal of Foraminiferal Research. 33: 237-261. gs Cushman, J. A. (1925a). A new genus of Eocene foraminifera. Proceedings of the United States National Museum. 66(30): 1-4. gs Thalmann, H. E. (1942). Foraminiferal genus Hantkenina and its subgenera. American Journal of Science. 240: 809-820. gs References:
Hantkenina compiled by the pforams@mikrotax project team viewed: 10-12-2024
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