| Daughter taxa: (blue => in age window 0-300Ma) | ||||
| | | ||
| | |||
| | | | |
| | | | |
| | | | |
| | | | |
| | | ||
| | | | |
| | | | |
| Specimens which cannot be assigned to established species | ||||
Taxonomy
Original description: Microhedbergella Huber and Leckie, 2011:
Test wall thin, microperforate, wall pores evenly distributed and variably spaced in adult chambers, surface smooth or with scattered and weakly developed pustules. Test small to moderate in size, coiled in a very low to low trochospire, spiral side evolute, umbilical side mostly involute; chambers globular, never elongated radially, increasing rapidly to moderately in size, with 3–6 in the final whorl; aperture a low interiomarginal, umbilical-extraumbilical arch bordered by a thin lip or flap that may extend partly into umbilical region.
Entries in the Catalog of original descriptions: Microhedbergella;
Distinguishing features:
Test wall thin, microperforate, surface smooth or with scattered and weakly developed pustules. Test low trochopiral, small, chambers globular, increasing rapidly to moderately in size, with 3–6 in the final whorl; aperture a low interiomarginal, umbilical-extraumbilical arch bordered by a thin lip or flap.
Geological Range:
Last occurrence (top): near top of Maastrichtian Stage (90% up, 66.6Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): near top of Aptian Stage (91% up, 114.2Ma, in Aptian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous
Character matrix
| test outline: | chamber arrangement: | Trochospiral | edge view: | aperture: | Umb.-extraumbilical | ||
| umb chamber shape: | coiling axis: | periphery: | N/A | aperture border: | Thin lip | ||
| sp chbr shape: | umbilicus: | periph margin shape: | Moderately rounded | accessory apertures: | |||
| umbilical or test sutures: | umb depth: | wall texture: | shell porosity: | Microperforate: <1µm | |||
| spiral sutures: | final-whorl chambers: | 0.0-0.0 |
References:
 |
Microhedbergella compiled by the pforams@mikrotax project team viewed: 18-10-2018
|