|Daughter taxa (time control age-window is: 0-800Ma)|
Specimens which cannot be assigned to established species
Original description: Diagnosis.– Test biserial, with subspherical chambers throughout. Chambers increase more or less regularly in size as added. Sutures distinct and depressed. Main aperture in the shape of a low- to medium-high arch, situated at the base of the last-formed chamber. Test ornamentation irregularly reticulate, at least in the earlier portion; chambers sometimes costate.
Description.– Test robust, biserial throughout. Chambers are subspherical, with the younger distinctly overlapping the previously formed ones. Chambers increase more or less regularly in size as added, resulting in highly variable shape of the test in lateral view. Chamber proliferation may occur occasionally in rare specimens. Sutures are distinct, depressed, and straight to slightly oblique to the axis of growth. Main aperture has the shape of a low to medium high arch, situated at the base of the last formed chamber of the test. It is bordered by two lateral, imperforate, rod-like rims, which are or are not attached to the penultimate chamber, and a wide imperforate band in the central part. Additional apertures can be developed along the zigzag suture if the rod-like rims are suspended. Test ornamentation is irregularly reticulate throughout. Costate ornamentation was observed on the last-formed chambers of some specimens. The test wall is calcareous, hyaline, finely perforate, the pores being situated in the spaces de- fined by the irregular reticulate network, or between the robust costae.
Entries in the Catalog of original descriptions: Braunella
Parent taxon (Heterohelicidae): Aperture symmetrical, ranging from a low slit to a high arch at the base of the final chamber, becoming terminal in uniserial taxa.
This taxon: Biserial throughout, chambers globular, wall texture with irregular reticulate ornamentation
Last occurrence (top): near top of Maastrichtian Stage (94% up, 66.4Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Campanian Stage (64% up, 76.2Ma, in Campanian stage). Data source: Total of range of species in this database
Plot of range and occurrence data:
Braunella compiled by the pforams@mikrotax project team viewed: 8-2-2023
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