Taxonomy
Original description: Test rotaliform, dorsal side convex, ventral side umbilicate; periphery rounded; chambers subglobular, closely appressed and penultimate chambers sometimes smaller than anatepenultimate; sutures distinct, depressed, slightly curved; wall calcareous, finely perforate; aperture opening into umbilicus, almost invariably obscured by foreign material.
Entries in the Catalog of original descriptions: Globigerina loetterli, Hedbergella murphyi
Character matrix
| test outline: | Lobate | chamber arrangement: | Trochospiral | edge view: | Spiroconvex | aperture: | Umbilical |
| sp chamber shape: | Inflated | coiling axis: | Low | periphery: | N/A | aperture border: | N/A |
| umb chbr shape: | Inflated | umbilicus: | Wide | periph margin shape: | Broadly rounded | accessory apertures: | None |
| spiral sutures: | Moderately depressed | umb depth: | Shallow | wall texture: | Finely pustulose | shell porosity: | Finely Perforate: 1-2.5µm |
| umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 6-8 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Geological Range:
Last occurrence (top): within M. schneegansi zone (89.75-92.51Ma, top in Turonian stage). Data source: [copied from Chronos database]
First occurrence (base): within M. schneegansi zone (89.75-92.51Ma, base in Turonian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Nauss, A. W. (1947). Cretaceous Microfossils of the Vermillion Area, Alberta. Journal of Paleontology. 21(4): 329-343. gsReferences:

![]() |
Muricohedbergella loetterli compiled by the pforams@mikrotax project team viewed: 9-9-2026
Short stable page link: https://mikrotax.org/pforams/index.php?id=110370 Go to Archive.is to create a permanent copy of this page - citation notes |
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Comments