Hedbergella sigali

Taxonomy

Original description: Translated from French (Chronos translation). "Trochospiral test, ventrally involute, dorsally evolute (two whorls showing), of a small size (diameter 0.20 to 0.30mm), fairly compressed, with a lobate outline, 4 to 4.5 chambers (mostly 4) in the last whorl; the chambers are globular, with a fair increase in height as added. Spiral side most of the time flat, sometimes more or less convex, as a result of a raising (never very marked) of the trochospire. Ventral side without umbilicus. Aperture, ventral, umbilical-extraumbilical, reaching the periphery, bordered by a short lip."

Test trochospiralé, involute ventralement, évolute dorsalement (deux tours d' enroulement visibles ), de petite taille (diamètre de l'ordre de 0, 20 à 0,30 mm), modérément comprimé, au contour lobé, avec 4 à 4, 5 loges (le plus souvent 4) au dernier tour; les loges sont globuleuses, avec un accroissement en hauteur assez rapide à mesure qu'elles s'ajoutent. Face dorsale 1e plus souvent plane, parfois plus ou moins bombée, par suite d'un décollement (jamais très prononcé) de la trochospire, Face ventrale non ombiliquée. Ouverture ventrale, ombilicale-extraombilicale, atteignant la périphérie, bordée d'une courte lèvre .

Entries in the Catalog of original descriptions: Hedbergella sigali, Praehedbergella grigelisae

Emended description:

Geological Range:
Last occurrence (top): within G. algerianus zone (116.86-118.24Ma, top in Aptian stage). Data source: Moullade et al., 2005
First occurrence (base): at base of H. sigali zone (0% up, 134.7Ma, in Valanginian stage). Data source: zonal marker (from Timescale Creator)

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: Hedbergella sigali, synonyms included - Claviblowiella sigali; Hedbergella sigali; Praehedbergella grigelisae;
• See also space-time plot :: Samples map :: Parent: Hedbergella

Hedbergella sigali compiled by the pforams@mikrotax project team viewed: 8-12-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110263 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