Taxonomy
Original description: Shell small, similar in external appearance to Globigerinella aspera (Ehrenberg). Spiral low. Whorls 2.5-3.0.First whorl lies below the outer surface of the second or in the same plane. There are 6-7 chambers, or occasionally 8, to the last whorl. Chambers spherical, noticeably increasing in size and lying closely packed together; they are delimited from each other by almost straight, deep sutures. Peripheral margin rounded, slightly undulate, almost smooth. Umbilicus clearly visible, narrow. Orifices slit-like lying between the umbilicus and the peripheral margin, frequently with lips. Walls smooth.
Entries in the Catalog of original descriptions: Globigerina globigerinellinoides
Character matrix
test outline: | Circular | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | Extraumbilical |
sp chamber shape: | - | coiling axis: | Very low | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | - | umbilicus: | Narrow | periph margin shape: | Moderately rounded | accessory apertures: | None |
spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | - |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 6-8 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within Cenomanian Stage (93.90-100.50Ma, top in Cenomanian stage). Data source: [copied from Chronos database]
First occurrence (base): within Albian Stage (100.50-113.20Ma, base in Albian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Georgescu, M. D. (2010a). Liuenella, new name for Liuella Georgescu, 2008. Journal of Foraminiferal Research. 40: 206-. gs Sigal, J. (1979). Chronostratigraphy and ecostratigraphy of Cretaceous formations recovered on DSDP Leg 47B, Site 398. Initial Reports of the Deep Sea Drilling Project. 47(2): 287-326. gs Subbotina, N. N. (1949). Микрофауна меловых отложений южного склона Кавказа [Microfauna from the Cretaceous of the southern slope of the Caucasus]. Trudy VNIGRI Mikrofauna USSR. 34: 5-36. gsReferences:
Liuenella globigerinellinoides compiled by the pforams@mikrotax project team viewed: 14-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110317 Go to Archive.is to create a permanent copy of this page - citation notes |
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