Praegublerina acuta

Taxonomy

Original description: Diagnosis : A Gublerina with the following peculiarities: test relatively small, the initial chambers are increasing slowly; they are separated from each other by distinctly visible depressed sutures and not covered by rugosities like those of genotype G. cuvillieri.

Description : The test consists of two divergent rows of more or less globular chambers connected with each other by a calcareous lamella. The latter also contains a varying number of irregularly dispersed, often partly reniform, chambers filling almost the whole space between the two lateral rows of chambers of some of the specimens. The chambers of the lateral divergent rows are separated from each other by depressed sutures. Their size is generally increasing from the first to the last, although this increase in size is not always regular. The size of the initial chambers is increasing more slowly than of these ones of G. cuvillieri. The last chambers are often elongating a little towards the centre of the test. The whole test is sometimes compressed in the vertical direction towards the symmetric plane of both divergent rows of chambers. The calcareous lamella, filling the space between these rows, occasionally encloses the upper end of the test and part of its flanks.

The aperture of the specimens found up to now could not be seen; it can be assumed however that it is at the inner basis of the last chamher like G. cuvillieri Kikoine.

Entries in the Catalog of original descriptions: Gublerina acuta, Gublerina hedbergi

Geological Range:
Last occurrence (top): within P. hariaensis zone (66.39-67.64Ma, top in Maastrichtian stage). Data source: [copied from Chronos database]
First occurrence (base): within R. calcarata zone (75.06-75.91Ma, base in Campanian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Praegublerina acuta, synonyms included - Gublerina acuta; Gublerina acuta robusta; Gublerina hedbergi; Gublerina robusta; Guembelina robusta;
• See also space-time plot :: Samples map :: Parent: Praegublerina

Praegublerina acuta compiled by the pforams@mikrotax project team viewed: 10-5-2026 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110440 Go to Archive.is to create a permanent copy of this page - citation notes

Add Comment

* Required information

Comment

Name

Email

Country

Captcha

Notify me of new comments via email

Remember my form inputs on this computer

I have read and agree to the terms and conditions

x

Insert Bullet List

Please enter at least one item.

Item:

Item:

Item:

Item:

Item:

x

Insert Numeric List

Please enter at least one item.

Item:

Item:

Item:

Item:

Item:

x

Insert Image

Please enter the link of the image

x

Privacy Policy

This policy contains information about your privacy. By posting, you are declaring that you understand this policy:

• Your name, rating, website address, town, country, state and comment will be publicly displayed if entered.
• Aside from the data entered into these form fields, other stored data about your comment will include:
  • Your IP address (not displayed)
  • The time/date of your submission (displayed)
• Your email address will not be shared. It is collected for only two reasons:
  • Administrative purposes, should a need to contact you arise.
  • To inform you of new comments, should you subscribe to receive notifications.
• A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself.

This policy is subject to change at any time and without notice.

x

Terms and Conditions

These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:

• Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
• You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
• You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
• The administrator has the right to edit, move or remove any comment for any reason and without notice.

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

No comments yet. Be the first!

x