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Clavihedbergella subdigitata


Classification: pf_mesozoic -> Hedbergellidae -> Clavihedbergella -> Clavihedbergella subdigitata
Sister taxa: C. amabilis, C. eocretacea, C. leckiei, C. moremani, C. moulladei, C. pauliani, C. simplex, C. simplicissima, C. subcretacea, C. subdigitata, C. sp.,

Taxonomy

Citation: Clavihedbergella subdigitata (Carman, 1929)
Rank: Species
Basionym: Globigerina subdigitata

Type images:

Original description: Globigerina subdigitata Carman 1929: "Test trochoid, in early stages with very low spire, becoming nearly planispiral in the adult, perforate. Last few chambers greatly elongated, with blunt ends, with chamber walls parallel not tapering. Axis of these chambers joins test at tangential angle."

Entries in the Catalog of original descriptions: Globigerina subdigitata;

Geological Range:
Last occurrence (top): within D. asymetrica zone (84.19-86.71Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. concavata zone (86.71-89.91Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

Character matrix

test outline:Stellatecoiling axis:Very lowchamber arrangement:Planispiralumbilicus:Narrow
edge view:Hourglassumbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:
wall texture:Smoothaperture:Equatorialaperture border:Thin lipaccessory apertures:Relict
periphery:N/Aumb chamber shape:Elongatesp chbr shape:Elongateperiph margin shape:Moderately rounded
umb depth:Shallowdiameter mm:0.4width mm:breadth mm:0.11
final-whorl chambers:4.5-5.5

References:

Carman, K., (1929). Some foraminifera from the Niobara and Benton formations of Wyoming. Journal of Paleontology, 3(3): 309-315.


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Clavihedbergella subdigitata compiled by the pforams@mikrotax project team viewed: 23-7-2017

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