Hedbergella
Extinct genus of single-celled organisms / From Wikipedia, the free encyclopedia
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Hedbergella is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as:
Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to Praeglobotruncana but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of Praeglobotruncana as by Banner and Blow (1959).
Hedbergella | |
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Scientific classification | |
Domain: | Eukaryota |
Clade: | Diaphoretickes |
Clade: | SAR |
Phylum: | Retaria |
Subphylum: | Foraminifera |
Class: | Globothalamea |
Order: | Rotaliida |
Family: | †Hedbergellidae |
Subfamily: | †Hedbergellinae |
Genus: | †Hedbergella Brönnimann and Brown, 1958 |
Species | |
See text |
Hedbergella was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina.[1] Hedbergella ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the end.