Stephanolithion speciosum

Classification: Mesozoic -> Stephanolithiales -> Stephanolithiaceae -> Stephanolithion -> Stephanolithion speciosum
Sister taxa: S. atmetos, S. bigotii, S. brevispinus, S. hexum, S. speciosum, S. sp.,

Distinguishing features: Elliptical with multiple short rim spines and eight cross bars.


Citation: Stephanolithion speciosum Deflandre in Deflandre & Fert, 1954
Rank: Species

Farinacci & Howe catalog pages: Stephanolithion speciosum * , Stephanolithion speciosum octum * , Stephanolithion carinatum *

Distinguishing features: Elliptical with multiple short rim spines and eight cross bars.

Morphology remarks: There appears to be relatively continuous variation in the length of the rim spines and so the species/subspecies Stephanolithion speciosum octum (distinguished by longer rim spines) should probably be considered a subspecies or variant of Stephanolithion speciosum.

Search data:
TagsLITHS: murolith, CA: grill, process, V-UNITS: V-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 4->7µm;
Sources: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NJ12b subzone (164.79-165.55Ma, top in Callovian stage). Data source: Bown & Cooper 1998
First occurrence (base): at base of NJ10 zone (0% up, 169.7Ma, in Bajocian stage). Data source: Bown & Cooper 1998 (fig 4) - zonal event

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Stephanolithion


    Barnard, T. & Hay, W. W. (1974). On Jurassic coccoliths: A tentative zonation of the Jurassic of Southern England and North France. Eclogae Geologicae Helvetiae. 67(3): 563-585. gs :: view :: open

    Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs :: ::

    Bown, P. R., Cooper, M. K. E. & Lord, A. R. (1988). A calcareous nannofossil biozonation scheme for the early to mid Mesozoic. Newsletters on Stratigraphy. 20: 91-114. gs :: ::

    Deflandre, G. & Fert, C. (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie. 40: 115-176. gs :: ::

    Medd, A. W. (1979). The Upper Jurassic coccoliths from the Haddenham and Gamlingay boreholes (Cambridgeshire, England). Eclogae Geologicae Helvetiae. 72: 19-109. gs :: view :: open

    Perch-Nielsen, K. (1984). Validation of new combinations. INA Newsletter. 6(1): 42-46. gs :: view :: open

    Rood, A. P. & Barnard, T. (1972). On Jurassic coccoliths: Stephanolithion, Diadozygus and related genera. Eclogae Geologicae Helvetiae. 65: 327-342. gs :: view :: open


    Stephanolithion speciosum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-7-2020

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    Short stable page link: Go to to create a permanent copy of this page - citation notes

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