Nannotax3 - ntax_cenozoic - molischii type <title>Nannotax3 - ntax_cenozoic - molischii type

molischii type


Classification: ntax_cenozoic -> Syracosphaerales -> Syracosphaeraceae -> Syracosphaera -> SY molischii gp -> molischii type
Sister taxa: borealis type, halldalii type, molischii type, rotula type

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
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
BCs robust, rim wide, ornamented
Syracosphaera molischii type 1
Syracosphaera molischii type 2
Syracosphaera molischii type 3
Syracosphaera molischii type 4

Syracosphaera hastata
BCs narrow smooth rim; CFCs with tall spines

Syracosphaera marginiporata
BCs small, large central plaque and narrow lath cycle, rim narrow smooth

Syracosphaera ossa
BCs with broad smooth rim
Syracosphaera ossa type 1
Syracosphaera ossa type 2

Syracosphaera epigrosa
BCs like S. ossa but with central ring of nodes; CFCs like S. ossa, with flattened spine; XCs not known

Taxonomy:

Citation: molischii type Young et al., 2003
Rank: species sub-group

Distinguishing features:
Parent taxon (SY molischii gp): BCs placolith-like (i.e. with proximal and distal flanges), often with ridges and irregular central area calcification, no spines. XCs variable.
This taxon: XCs “undulating” planoliths, confined to imbricate circlet around flagellar pole. CFCs with spines showing calyx with 4-fold symmetry, AACs usually present.

Farinacci & Howe catalog pages:


Morphology:

The XCs are highly distinctive and are formed of: 1. Asymmetric flange with variably-developed wing like extensions (directed toward and away from apical pole of coccosphere). 2. Conical central area (concave on distal side, convex on proximal side), with horseshoe shaped slits at either end.
Coccospheres are typically small and somewhat flattened/oblate - i.e. wider than long. 

Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

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 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:

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 V O


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molischii type compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 31-1-2023

Taxon Search:
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AphiaID: not found
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=877 Go to Archive.is to create a permanent copy of this page - citation notes



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