arrayname: original
Taxonomy
Original description: Test wall microperforate, pore diameter ranging 0.4 to 0.8 microns, surface smooth or with very fine pustules. Test very small, coiled in a low to rarely moderate trochospire, equatorial periphery moderately to strongly lobate, unequally biconvex, test thickness:diameter ratio averaging 0.61; chambers inflated, dextrally or sinistrally coiled in 1.5 to 2 whorls of 6 to 8 chambers that increase rapidly in size with 3 to 4 chambers in the final whorl, ultimate:penultimate ratio averaging 1.1, final chamber slightly reniform; sutures depressed, radial, straight; umbilicus shallow, narrow; aperture an extra-umbilical low arch that extends from near the peripheral margin nearly to the umbilicus, bordered by a narrow lip.
Entries in the Catalog of original descriptions: Microhedbergella miniglobularis
Character matrix
test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Inequally biconvex | aperture: | Extraumbilical |
sp chamber shape: | coiling axis: | Low-moderate | periphery: | aperture border: | Thin lip | ||
umb chbr shape: | umbilicus: | Narrow | periph margin shape: | accessory apertures: | |||
spiral sutures: | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Microperforate: <1µm | |
umbilical or test sutures: | Moderately depressed | final-whorl chambers: | 3-4 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within M. renilaevis zone (112.96-113.20Ma, top in Albian stage). Data source: [copied from Chronos database]
First occurrence (base): near top of P. rohri zone (91% up, 113.5Ma, in Aptian stage). Data source: zonal marker (from Timescale Creator)
Plot of range and occurrence data:
Huber, B. T. & Leckie, R. M. (2011). Planktic foraminiferal species turnover across deep-sea Aptian/Albian boundary sections. Journal of Foraminiferal Research. 41: 53-95. gsReferences:
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Microhedbergella miniglobularis compiled by the pforams@mikrotax project team viewed: 21-4-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=110349 Go to Archive.is to create a permanent copy of this page - citation notes |
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