Plectodiscus

Daughter taxa (time control age-window is: 0-800Ma)
				Plectodiscus bergontianus neptune records:
				Plectodiscus sp. neptune records:

Taxonomy

Catalog entries: Plectodiscus

Original description: Thin, biconvex skeleton, with oval, less frequently circular outline, consisting of frontal, equatorial, and sagittal girdles. The closed-spiral structure of girdles is of the Spironium type: wings of the same type of girdle form a one-half turn of the spiral, and at the point of their junction overlap each other. Fist system has fully developed girdles, its dimensions are 40-50µm; in the rest of the girdles only the equatorial girdle is fully developed, both sagittal and frontal girdles terminating at the point of their junction with the previous system. Distance between rings is greater than is the diameter of the central chamber. Inner spines are indistinct; rim of the disc is smooth or is covered by numerous short spines.

Depending on the degree of inclination of the plane of the girdles in relation to the main axes of the skeleton, the equatorial girdles appear from the surface (rest of girdles in corresponding cross-section) in the form of rings, as a single or double spiral, or in the form of rings connected by zigzag radial lines.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of Neogene Period (100% up, 2.6Ma, in Piacenzian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Total of ranges of species in this database

Plot of 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: Spongodiscidae inc sed

Plectodiscus compiled by the radiolaria@mikrotax project team viewed: 20-9-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=205058 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

No comments yet. Be the first!

x