Rugotruncana

Daughter taxa (time control age-window is: 0-800Ma)
			Rugotruncana circumnodifer
			Rugotruncana nothi
			Rugotruncana subcircumnodifer
			Rugotruncana sp. Specimens which cannot be assigned to established species

Taxonomy

Original description: The calcareous hyaline test is trochospirally coiled. The small early chambers are globular, inflated, and globigerine-like. Later chambers are very slightly to strongly flattened and exhibit a keeled, imperiorate, peripheral band. The early chambers are smooth walled, but some or all later chambers exhibit fine discontinuous costellae or traces of costellae. The principal aperture is rounded, interiomarginal, and opens into a relatively large umbilicus. Long apertural flaps extend into the umbilicus, and in later chambers form a protruded, imperforate, umbilical cover-plate with accessory apertures.

Entries in the Catalog of original descriptions: Rugotruncana

Distinguishing features:
Parent taxon (Rugoglobigerinidae): Test trochospiral, chambers inflated, periphery rounded, not carinate; wall with pustules, costellae, or other rugosities; aperture umbilical, with portici or tegilla.
This taxon: Test with a low trochospiral coil, early chambers subglobular and inflated, later chambers slightly compressed, sutures curved on the spiral side and continuous with the peripheral carina, straight, radial, and depressed on the umbilical side, umbilicus wide, periphery with double-keeled imperforate carinal band; wall calcareous, finely perforate, surface strongly pustulose, adjacent pustules may coalesce into short costellae without distinct alignment, although resulting in a rugose surface; primary aperture interiomarginal, umbilical, elongate portici in the early chambers, later with distinctly protruding tegilla provided with accessory apertures.

Geological Range:
Last occurrence (top): at top of P. hariaensis zone (100% up, 66.4Ma, in Maastrichtian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within R. calcarata zone (75.06-75.91Ma, base in Campanian stage). Data source: Total of ranges of species in this 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
• Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Rugoglobigerinidae

Rugotruncana compiled by the pforams@mikrotax project team viewed: 13-10-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110509 Go to Archive.is to create a permanent copy of this page - citation notes

Add Comment

* Required information

Notify me of new comments via email

Remember my form inputs on this computer

I have read and agree to the terms and conditions

Powered by Commentics

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 (2)

 

 

 

 

Notify Me

Le Coze

Posts: 147

Since: Aug 2017

Le Coze

The taxonomic discussion states that G. tilevi remains the correct name for the type species of Rugotruncana but it is included in the synonyms of G. circumnodifer?

17 September 2017 17:48

Jeremy Young

Posts: 535

Since: Jan 2017

Jeremy Young(UK)

Indeed, I will point his out to Brian

5 October 2017 22:12

 

RSS Alerts

 

x

Delete Comment

Are you sure you want to delete it?

Share a link to this comment

Close

x