Citation: Lithostromationaceae Deflandre, 1959Rank: FamilyTaxonomic discussion: The genera Isolithus and Lacunolithus described by Lyul'eva 1967 were included by Young & Bown 1997 in the Lithostromationaceae since they have similar morphology and neritic distribution to the better known genera. Alternativley they might be regared as junior synonyms of Lithostromation. [my interpretation - JRY 2021]
Distinguishing features: Parent taxon (Nannolith families inc sed): Haptophytes forming calcareous structures not obviously homologous with heterococcoliths, holococcoliths, or discoasteralids This taxon: Large (10-20µm) triangular to stellate nannoliths with porous structure formed from small crystallites. In xpl behave as single crystal unit with low birefringence
Morphology: Crystallography - probably the same as discoasters, i.e formed entirely of V-units. The nannoliths are thick and often slightly tilted so show some birefringence [my interpretation - JRY 2017] Size:
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range: Last occurrence (top): in mid part of Ionian Stage (52% up, 0.4Ma, in Ionian stage). Data source: Total of range of species in this database First occurrence (base): at base of Ypresian Stage (0% up, 56Ma, in Thanetian stage). Data source: Total of range of species in this database
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
Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: Nannolith families inc sed
References:
Deflandre, G. (1959). Sur les nannofossiles calcaires et leur systématique. Revue de Micropaléontologie. 2: 127-152. gs
Lyul'eva, S. A. (1967). Coccolithophoridae in the Turonian strata of the Dneiper-Don Basins. Geologicheskiy Zhurnal. 27: 91-98. gsVO
Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs
Young, J. R. & Bown, P. R. (1997a). Cenozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 36-47. gsVO
Lithostromationaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-2-2023
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