Taxonomy
Original description: "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
Character matrix
test outline: | Stellate | chamber arrangement: | Planispiral | edge view: | Hourglass | aperture: | Equatorial |
sp chamber shape: | Elongate | coiling axis: | Very low | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Elongate | umbilicus: | Narrow | periph margin shape: | Moderately rounded | accessory apertures: | Relict |
spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 4.5-5.5 | N.B. These characters are used for advanced search. N/A - not applicable |
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 range and occurrence data:
Carman, K. (1929). Some foraminifera from the Niobara and Benton formations of Wyoming. Journal of Paleontology. 3(3): 309-315. gs Eicher, D. L. & Worstell, P. (1970). Lunatriella, a Cretaceous heterohelicid foraminifer from the western interior of the United States. Micropaleontology. 16(1): 117-121. gsReferences:
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Clavihedbergella subdigitata compiled by the pforams@mikrotax project team viewed: 11-12-2023
Short stable page link: https://mikrotax.org/pforams/index.php?id=110051 Go to Archive.is to create a permanent copy of this page - citation notes |
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