Catalog entries: Globigerina radians
Type images:Distinguishing features:
Parent taxon (Globigerinella): Test initially trochospiral, becoming nearly planispiral; globular to ovate chambers; aperture umbilical; fine spines cover the test
This taxon: Near planispiral coiling & slightly radially elongate chambers
Coiling direction (in extant population): mixed
Morphology:
Wall type:
Character matrix
test outline: | Stellate | chamber arrangement: | Pseudoplanispiral | edge view: | Equally biconvex | aperture: | Equatorial |
sp chamber shape: | Globular | coiling axis: | Very low | periphery: | N/A | aperture border: | N/A |
umb chbr shape: | Globular | umbilicus: | Wide | periph margin shape: | Broadly rounded | accessory apertures: | None |
spiral sutures: | Strongly depressed | umb depth: | Deep | wall texture: | Cancellate | shell porosity: | Macroperforate: >2.5µm |
umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 4-5 | N.B. These characters are used for advanced search. N/A - not applicable |
In modern oceans a common, warm water, species [SCOR WG138]
Geographic distribution
Most likely ancestor: Globigerinella siphonifera - at confidence level 3 (out of 5). Data source: Weiner et al. 2015, f11.
Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton (SCOR WG138)
First occurrence (base): within Tortonian Stage (7.25-11.62Ma, base in Tortonian stage). Data source: Weiner et al. 2015, prediction form molecular clock (so very large error margin)
Plot of occurrence data:
Egger, J. G. (1893). Foraminiferen aus Meeresgrundproben, gelothet von 1874 bis 1876 von S. M. Sch. Gazelle. Abhandlungen der königlichen bayerischen Akademie Wissenschaften zu München. 18(2): 195-457. gs Weiner, A. K. M., Weinkauf, M. F. G., Kurasawa, A., Darling, K. F. & Kucera, M. (2015). Genetic and morphometric evidence for parallel evolution of the Globigerinella calida morphotype. Marine Micropaleontology. 114: 19-35. gsReferences:
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Globigerinella radians compiled by the pforams@mikrotax project team viewed: 4-12-2023
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