Taxonomy
Original description: Test small, strongly convex, turret-shaped, consisting of 3 whorls; there are 4-5 highly inflated rounded chambers in the final whorl; these chambers are closely adjacent to one another so that the whole test looks like a disorganized accumulation of spherical chambers. The chambers grow very uniform in size. The sutures are short, slightly curved, almost straight. The umbilical aperture is a large slit in the extraumbilical area. The aperture has a small raised lip. Wall smooth, finely porous. Average dimensions: Diameter 0.15 mm; greatest thickness 0.10 mm.
Entries in the Catalog of original descriptions: Globigerina hoterivica
Morphology:
Close inspection of the axis of coiling in the Crimean specimens shows that it may change angle from the earlier to the last whorl, with the earlier 2-2.5 whorls being positioned almost sideways from the last whorl.
In this sense, F. hoterivica resembles the mode of coiling of Conoglobigerina gulekhensis (Gorbachik & Poroshina), which warrants more detailed study of these taxa from several localities to determine in more detail to what extent the test morphology of the two taxa overlaps. Among the Crimean specimens several show a looped aperture, as commonly found in Globuligerina oxfordiana (Grigelis). A bulla-like last chamber is common. Wall texture in the Crimean specimens is poorly preserved but reticulate (Gradstein et al., 2018).
Wall type:
Size:
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Inequally biconvex | aperture: | Umbilical |
sp chamber shape: | Inflated | coiling axis: | Moderate | periphery: | N/A | aperture border: | Thick lip |
umb chbr shape: | Inflated | umbilicus: | Narrow | periph margin shape: | Broadly rounded | accessory apertures: | N/A |
spiral sutures: | Moderately depressed | umb depth: | Deep | wall texture: | Cancellate | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4.0-4.5 | N.B. These characters are used for advanced search. N/A - not applicable |
Most likely ancestor: Globuligerina oxfordiana - at confidence level 5 (out of 5). Data source: .
Geological Range:
Notes: Berriasian through ? Barremian; Favusella hoterivica is widely reported and easily recognized.
Last occurrence (top): within L. cabri zone (123.89-125.71Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): at base of G. hoterivica zone (0% up, 141.9Ma, in Berriasian stage). Data source: zonal marker (from Timescale Creator)
Plot of range and occurrence data:
Butt, A. (1979). Lower Cretaceous foraminiferal biostratigraphy, paleoecology, and depositional environment at DSDP Site 397, Leg 47A. Initial Reports of the Deep Sea Drilling Project. 47(1): 257-271. gs Coccioni, R. & Premoli Silva, I. (1994). Planktonic foraminifera from the Lower Cretaceous of Rio Argos sections (southern Spain) and biostratigraphic implications. Cretaceous Research. 15: 645-687. gs Gradstein, F., Waskowska, A., Kopaevich, L., Watkins, D., Friis, H. & Perez Panera, J. (2018). Berriasian planktonic foraminifera and calcareous nannofossils from Crimea Mountains, with reference to microfossil evolution. Swiss Journal of Geosciences. 1-24. gs Lipson-Benitah, S. & Almogi-Labin, A. (2004). Aptian planktonic foraminifera from Israel. Israel Journal of Earth Sciences. 53(1): 27-46. gs Subbotina, N. N. (1953). Foraminiferes fossiles d'URSS Globigerinidae, Globorotaliidae, Hantkeninidae. Bureau de Recherches Geologiques et Minieres. 2239: 1-144. gs Wernli, R., Ascoli, P. & Williams, G. L. (1995). Favusella hoterivica (Subbotina) from the Berriasian and Valanginian of offshore Eastern Canada. Revue de Paléobiologie. 14(2): 379-398. gsReferences:
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Favusella hoterivica compiled by the pforams@mikrotax project team viewed: 1-6-2023
Short stables page link: https://mikrotax.org/pforams/index.php?id=110107 Go to Archive.is to create a permanent copy of this page - citation notes |
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