Heliodiscus hexasteriscus

Taxonomy

Catalog entries: Heliodiscus hexasteriscus

Original description: Shell like a sunburst with six rays of moderate length, equal in size except as broken, about half the diameter of the cortical shell in length, strongly four-angled in the lower three-fourths and rounded distally; tips bluntly pointed, the bases flaring to the disc; hyaline, and with short, backwardly directed processes or hooklets in the proximal part, these evidently the places of attachment of contractile protoplasmic myonemes; cortical shell lenticular, biconvex, with small, regular, equal circular pores, the pores with thin, raised rims or collars and with very minute, rarely bifurcate, mostly simple, sepaloid spinules, about twenty pores or more in a radius, and from five to nine around the edge on an interradius; cavity of the pores cylindrical, asymmetrically pointed toward the center of the disc, wall thick; medullary shell obscured by the extreme density of the cortical wall.
Remarks on original description: [The authors here list Heliodiscus hexasteriscus under the subgeneric name Heliodiscetta and include the subgeneric name in the species name.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within Paleogene Period (23.03-66.04Ma, top in Chattian stage). Data source: Lazarus et al. 2015 - "P age group"
First occurrence (base): within Paleogene Period (23.03-66.04Ma, base in Danian stage). Data source: Lazarus et al. 2015 - "P age group"

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
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Heliodiscus

Heliodiscus hexasteriscus compiled by the radiolaria@mikrotax project team viewed: 29-11-2023 Taxon Search: Advanced Search Short stables page link: https://mikrotax.org/radiolaria/index.php?id=204253 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