|Daughter taxa (time control age-window is: 0-800Ma)||Granddaughter taxa|
XCs elliptical discs, with a narrow rim, central part without conical depression. CFCs not differentiated.
Monothecate - no XCs. BCs with horizontal flanges and vertical tubes.
XCs “undulating” planoliths, confined to imbricate circlet around flagellar pole. CFCs with spines showing calyx with 4-fold symmetry, AACs usually present.
XCs wheel-like, with radial laths well-separated, spoke-like. BCs and XCs both show distinct chirality. CFCs not differentiated.
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]
|Metrics||Lith size: 1->3.5µm; Coccosphere size: 3->13µm;|
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:
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