Amphitholus acanthometra

Taxonomy

Catalog entries: Amphitholus acanthometra

Original description: Central chamber about twice as broad and as high as both cupolas. On the surface quite symmetrically distributed twenty long and strong cylindrical radial spines; eight in the sagittal plane or in the meridian plane of the central chamber (four opposite in pairs in the principal and the sagittal axes, four others in the middle between the principal and the sagittal spines); four in the horizontal transverse plane, on both sides of the poles of the major or lateral axis; and eight in diagonal planes (corresponding to the eight wing-spines of Tetrapyle octacantha). In the centre of the central chamber is a distinct trizonal medullary shell like that of Tetrapyle, with two vertical columella beams. Pores of the cortical shell subregular, circular, with elevated hexagonal frames, about four times as broad as the bars; five to seven in the semicircle of one cupola. (This remarkable species differs from Tholartus vicenus in the possession of a medullary shell, from Amphitholonium acanthometra by the simple cortical shell. Compare these species).
Remarks on original description: Haeckel listed Amphitholus acanthometra under the subgeneric name Amphitholura, but did not include the subgeneric name in the species name.

In the description, the species name Amphitholonium acanthometra is not know. Haeckel here probably intends Amphitholonium acanthonium.[comment from RadWorld database]

Description

Morphology:

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R 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: Amphitholus

Amphitholus acanthometra compiled by the radiolaria@mikrotax project team viewed: 2-7-2022 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/radiolaria/index.php?id=203109 Go to Archive.is to create a permanent copy of this page - citation notes

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information

1000

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

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