Nannotax3 - ntax_cenozoic - SY molischii gp

SY molischii gp

Classification: ntax_cenozoic -> Syracosphaerales -> Syracosphaeraceae -> Syracosphaera -> SY molischii gp
Sister taxa: SY pulchra gp, SY molischii gp, SY nodosa gp, SY mediterranea group, Syraco - fossil, S. sp.

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
borealis type
XCs elliptical discs, with a narrow rim, central part without conical depression. CFCs not differentiated.
S. borealis
S. strigilis
S. exigua
S. pemmadiscus
S. andruleitii

halldalii type
Monothecate - no XCs. BCs with horizontal flanges and vertical tubes.
S. halldalii
S. protrudens

molischii type
XCs “undulating” planoliths, confined to imbricate circlet around flagellar pole. CFCs with spines showing calyx with 4-fold symmetry, AACs usually present.
S. molischii
S. hastata
S. marginiporata
S. ossa
S. epigrosa

rotula type
XCs wheel-like, with radial laths well-separated, spoke-like. BCs and XCs both show distinct chirality. CFCs not differentiated.
S. ampliora
S. rotula


Citation: SY molischii gp Young et al., 2003
Rank: species group

Distinguishing features:
Parent taxon (Syracosphaera): Coccospheres usually dithecate. Exothecal coccoliths (XCs) highly variable. Endothecal coccoliths are muroliths with 1, 2 or 3 flanges, the forms with 2 flanges are often placolith-like.
This taxon: BCs placolith-like (i.e. with proximal and distal flanges), often with ridges and irregular central area calcification, no spines. XCs variable.

Farinacci & Howe catalog pages: SY molischii gp [no catalog entry yet]

Search data:
MetricsLith size: 1->3.5µm; Coccosphere size: 3->13µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Gelasian Stage (0% up, 2.6Ma, in Piacenzian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research, Special Issue. 1: 1-132. gs V O


SY molischii gp compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2021

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

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