Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
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 copmosed 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 |
Taxonomy:
Distinguishing features: Elliptical holococcoliths with perforations.
Farinacci & Howe catalog pages: Holodiscolithus *
Search data:Tags | LITHS: holococcolith, elliptical, hollow, |
Metrics | Lith size: 2.5->6µm; |
Geological Range:
Last occurrence (top): in upper part of Ionian Stage (75% up, 0.3Ma, in Ionian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Danian Stage (63% up, 63.2Ma, in Danian stage). Data source: Total of range of species in this database
Plot of occurrence data:
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Holodiscolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-3-2021
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 |