Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | ![]() | ![]() | ![]() | Clathrolithus arenarius Large non-birefringent elliptical holococcolith comprising a perforate framework with a large central pore and 9-13 marginal pores. |
![]() | ![]() | Clathrolithus ellipticus Large, solid, elliptical and ‘C’-shaped holococcoliths that have honeycomb-like ridges on one surface. | ||
![]() | ![]() | ![]() | ![]() | Clathrolithus joidesa C-shaped nannoliths only observed in side view. Similar in appearance to Clathrolithus ellipticus but lacking clear ridges and pores. |
![]() | ![]() | Clathrolithus minutus Like Clathrolithus ellipticus but with a greater number of smaller pores/perforations (~<0.5 µm). | ||
Clathrolithus sp. Specimens which cannot be assigned to any established species |
Taxonomy:
Distinguishing features: Unusual holococcoliths with non-coccolith morphology typically comprising an elliptical, concavo-convex, domed, perforate framework.
Farinacci & Howe catalog pages: Clathrolithus * , Peritrachelina *
Morphology: Low birefringence in XPL.
Tags | LITHS: holococcolith, asymmetric, elliptical, CROSS-POLARS: 1ou, V-prominent, |
Metrics | Lith size: 7->9µm; |
Geological Range:
Last occurrence (top): in upper part of Rupelian Stage (74% up, 29.6Ma, in Rupelian stage). Data source: Total of range of species in this database
First occurrence (base): near top of Selandian Stage (87% up, 59.5Ma, in Selandian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs V O Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gs Deflandre, G. (1952). Classe des Coccolithophoridés. (Coccolithophoridae. Lohmann, 1902). In, Grassé, P. P. (ed.) Traité de Zoologie. Masson, Paris 439-470. gsReferences:
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Clathrolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-4-2021
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