Nannotax3 - ntax_cenozoic - SY molischii gp 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.
Syracosphaera borealis
Syracosphaera strigilis
Syracosphaera pemmadiscus
Syracosphaera andruleitii

halldalii type
Monothecate - no XCs. BCs with horizontal flanges and vertical tubes.
Syracosphaera halldalii
Syracosphaera 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.
Syracosphaera molischii
Syracosphaera hastata
Syracosphaera marginiporata
Syracosphaera ossa
Syracosphaera epigrosa

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

Taxonomy:

Citation: SY molischii gp Young et al., 2003
taxonomic 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:
Lith 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 ranges of the species in this database
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

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. S1: 1-132. gs


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SY molischii gp compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-3-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1331 Go to Archive.is to create a permanent copy of this page - citation notes
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