Daughter taxa (time control age-window is: 0-800Ma)![]() | Granddaughter taxa | ||||
| Holodiscolithus agniniae Flat, elliptical, formed from six crystallographic blocks divided by near-radial sutures. | |||||
| Holodiscolithus catellus Elliptical, narrow rim copmosed of many small elements, vacant central area | |||||
| Holodiscolithus geisenii Small, elliptical with complex, weakly birefringent, central plate | |||||
| Holodiscolithus lippertii elliptical, with axial ridges & 8-10 perforations; formed of 4 blocks with diagonal sutures | |||||
| Holodiscolithus liui Small, elliptical with open central area spanned by broad transverse bar (dark at 0°) | |||||
| Holodiscolithus macroporus Elliptical, non-birefringent in plan view, with 10-16 pores | |||||
| Holodiscolithus minolettii Elliptical, narrow dark rim composed of many small elements, central plate of birefringent blocks. | |||||
| Holodiscolithus serus Small, elliptical holococcolith with a narrow rim and small, bright transverse bar spanning the central area. | |||||
| Holodiscolithus solidus Cavate elliptical holococcolith; bars define 6 holes - 2 at ends and 4 at sides | |||||
| Holodiscolithus whitesideae Small, cavate, only known from side-view, steep-sided base with short, narrow spine and median septum | |||||
| Holodiscolithus sp. Specimens which cannot be assigned to any established species | |||||
Distinguishing features:
Parent taxon (fossil holococcoliths): Holococcolith genera only known from the fossil record
This taxon: Elliptical holococcoliths with perforations.
| LITHS: holococcolith, elliptical, hollow, |
| Lith size: 2.5->6µm; |
Geological Range:
Last occurrence (top): at top of NN20 zone (100% up, 0.3Ma, in Ionian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NP4 zone (61.51-63.25Ma, base in Danian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
![]() |
Holodiscolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-9-2026
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=715 Go to Archive.is to create a permanent copy of this page - citation notes |
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
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