INA16 Athens - September 2017

Helicosphaera compacta

Short diagnosis: Elliptical Helicosphaera with well defined birefringent blanket in XPL and narrow central area spanned by a conjunct bar.

Taxonomy:

Farinacci & Howe catalog pages: Helicosphaera compacta * Helicosphaera moorkensii *

Short diagnosis: Elliptical Helicosphaera with well defined birefringent blanket in XPL and narrow central area spanned by a conjunct bar.

Geological Range:
Last occurrence (top): within NP24 zone (26.84-29.62Ma, top in Chattian stage). Data source: de Kaenel & Villa, 1996
First occurrence (base): within NP16 zone (40.40-42.87Ma, base in Lutetian stage). Data source: [PRB rough estimate]

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
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Interpret with caution & read these notes
• Taxon plotted: Helicosphaera compacta, synonyms included - Helicopontosphaera compacta; Helicosphaera compacta; Parent: H. lophota group

Helicosphaera compacta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-8-2017 Taxon Search: Advanced Search AphiaID: 633243 Nomenclatural data on WoRMS Go to Archive.is to create a permanent copy of this page - citation notes

Comments (1)

Sort By Newest Oldest Positive Critical

Page 1 of 1

 

Simon Cole (UK)

Hi Jeremy
I've always put the LO of H. compacta intra-NP24, approximated to the top of the Early Oligocene (28.09 according to GTS2012). I believe this is where de Kaenel & Villa, 1996 observed it too in most of their sections from the Iberia Abyssal Plain. Would you consider amending the absolute age here to reflect this?
Cheers,
Simon

15th October 2015 10:19am

Ines Galovic (Croatia)

Maybe in IAP LO of the species marks the end of E. Oligocene, but in other Oceans (ODP, IODP and in other articles) its rare appearance certainly is in the Late Oligocene i.e. NP25, like in Adriatic (Mediterranean area)-mine observation.

24th November 2015 7:51am

Notify Me

Page 1 of 1

 

Are you sure you want to report it?

Share a link to this comment

Close

Add Comment

* Required information

1000

--- Chile France Germany Italy Japan Philippines Spain UK US --- Afghanistan Albania Algeria Andorra Angola Argentina Armenia Australia Austria Azerbaijan Bahrain Bangladesh Belarus Belgium Belize Benin Bermuda Bhutan Bolivia Bosnia and Herzegovina Botswana Brazil Brunei Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Central African Republic Chad China Colombia Congo Costa Rica Croatia Cuba Cyprus Czech Republic Denmark Djibouti Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falklands Finland Gabon Gambia Georgia Ghana Greece Greenland Guatemala Guinea Guinea-Bissau Guyana Haiti Honduras Hong Kong Hungary Iceland India Indonesia Iran Iraq Ireland Israel Ivory Coast Jamaica Jordan Kazakhstan Kenya Kosovo Kuwait Kyrgyzstan Laos Latvia Lebanon Lesotho Liberia Libya Liechtenstein Lithuania Madagascar Malawi Malaysia Mali Mauritania Mexico Moldova Monaco Mongolia Montenegro Morocco Mozambique Myanmar Namibia Nepal Netherlands New Zealand Nicaragua Niger Nigeria North Korea Norway Oman Pakistan Palestine Panama Papua New Guinea Paraguay Peru Poland Portugal Puerto Rico Qatar Romania Russia Rwanda San Marino Saudi Arabia Senegal Serbia Sierra Leone Singapore Slovakia Slovenia Somalia South Africa South Korea South Sudan Sri Lanka Sudan Suriname Swaziland Sweden Switzerland Syria Taiwan Tajikistan Tanzania Thailand Togo Trinidad and Tobago Tunisia Turkey Turkmenistan Uganda Ukraine United Arab Emirates Uruguay Uzbekistan Venezuela Vietnam Western Sahara Yemen Zambia Zimbabwe

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

Please enter at least one item.

Item:

Item:

Item:

Item:

Item:

Please enter at least one item.

Item:

Item:

Item:

Item:

Item:

Please enter the link of the website

Optionally you can add display text

Please enter the email address

Optionally add any display text

Please enter the link of the image

Please enter the link of the video

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 further commenting.

These terms and conditions are subject to change at any time and without notice.