Catalog entries: Hastigerinella caucasica
Type images:Distinguishing features:
Parent taxon (Clavigerinella): Final chambers clavate.
This taxon: Final chambers taper into an acute or pointed tip
Morphology:
Wall type:
Size:
Character matrix
test outline: | Stellate | chamber arrangement: | Pseudoplanispiral | edge view: | Hourglass | aperture: | Umbilical |
sp chamber shape: | Elongate | coiling axis: | Very low | periphery: | N/A | aperture border: | Thick lip |
umb chbr shape: | Elongate | umbilicus: | Wide | periph margin shape: | Subangular | accessory apertures: | Sutural |
spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4-4.5 | N.B. These characters are used for advanced search. N/A - not applicable |
Geographic distribution
Aze et al. 2011 summary: Known only from Austria and Tanzania; based on Coxall & Pearson (2006)
Isotope paleobiology
Aze et al. 2011 ecogroup 4 - Open ocean sub-thermocline; based on comparison with other species of the genus.
Phylogenetic relations
Most likely ancestor: Clavigerinella eocanica - at confidence level 3 (out of 5). Data source: Coxall & Pearson (2006), fig 8.1.
Likely descendants: Hantkenina singanoae;
plot with descendants
Geological Range:
Notes: Subbotina’s holotype is simply listed as being Eocene in age. Our observations in Austria and Tanzania suggest a very restricted range in the uppermost part of early Eocene Zone E7.
[Coxall & Pearson 2006]
Last occurrence (top): within E8 zone (43.85-45.72Ma, top in Lutetian stage). Data source: Coxall & Pearson (2006), fig 8.1
First occurrence (base): within E8 zone (43.85-45.72Ma, base in Lutetian stage). Data source: Coxall & Pearson (2006), fig 8.1
Plot of occurrence data:
Primary source for this page: Coxall & Pearson 2006 - Eocene Atlas, chap. 8, p. 218
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 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 Pearson, P. N. (1993). A lineage phylogeny for the Paleogene planktonic foraminifera. Micropaleontology. 39: 193-232. gs Pearson, P. N. et al. (2004). Paleogene and Cretaceous sediment cores from the Kilwa and Lindi areas of coastal Tanzania: Tanzania Drilling Project Sites 1–5. Journal of African Earth Sciences. 39: 25-62. gs Subbotina, N. N. (1958). In: Bykova, N.K., et al., New genera and species of foraminifera. Trudy VNIGRI Mikrofauna USSR. 115(9): 58-61. gsReferences:
Clavigerinella caucasica compiled by the pforams@mikrotax project team viewed: 5-12-2024
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