Syracosphaera monechiae

Classification: ntax_cenozoic -> Syracosphaerales -> Syracosphaeraceae -> Syracosphaera -> Syraco - fossil -> Syracosphaera monechiae
Sister taxa: N. franzii, S. clathrata, S. croatica, S. fragilis, S. horvati, S. monechiae, S. octiforma, S. oneillii, S. raffiae, S. tanzanensis, S. sp. fossil


Citation: Syracosphaera monechiae Dunkley Jones et al. 2009
Rank: Species

Distinguishing features: Small (3–4 µm), elliptical; rim narrow formed of sub-vertical elements with a distinct proximal flange; central-area wide spanned by a well-developed fragile lath cycle and a low central spine

Farinacci & Howe catalog pages: S. monechiae *

Search data:
TagsLITHS: murolith, elliptical, CA: ca_disjunct, grill, CROSS-POLARS: R-prominent, T-prominent,
MetricsLith size: 2->3µm;
Data source notes: lith length from illustrated specimens (OD range seems too high)
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP19-20 zone (34.44-36.97Ma, top in Priabonian stage). Data source: original description
First occurrence (base): within NP19-20 zone (34.44-36.97Ma, base in Priabonian stage). Data source: original description

Plot of occurrence data:


Bown, P. R., Lees, J. A. & Young, J. R. (2017). On the Cretaceous origin of the Order Syracosphaerales and the genus Syracosphaera. Journal of Micropalaeontology. 36(2): 153-165. gs V O

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs


Syracosphaera monechiae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-6-2021

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

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