dilatata type


Classification: ntax_cenozoic -> Syracosphaerales -> Syracosphaeraceae -> Syracosphaera -> SY pulchra gp -> dilatata type
Sister taxa: dilatata type, noroitica type, prolongata type, pulchra type

Daughter taxa (time control age-window is: 0-800Ma)
Syracosphaera arethusae
BCs - murolith mid-wall flange continuous, distal flange broad;
CFCs- with spine
XCs - larger murolith, mid-wall flange very weak or missing
Syracosphaera dilatata
BCs - murolith mid-wall flange beaded, distal flange narrow;
CFCs - with spine
XCs - larger murolith, mid-wall flange beaded.
Syracosphaera azureaplaneta
BCs - murolith, irregularly elliptical, mid-wall flange beaded
XCs - large with wide distal flange, central area of similar width to flange
Syracosphaera corolla
BCs - murolith, irregularly elliptical, mid-wall flange beaded
XCs - large with wide distal flange, central area much narrower than flange, parallel-sided

Taxonomy:

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

Distinguishing features: BCs with 3 flanges, but mid-wall flange weakly developed, as ring bead-like nodes; XCs muroliths, similar to BCs.

Farinacci & Howe catalog pages:

Search data:
TagsLITHS:
MetricsLith size: 2->3µm; Coccosphere size: 8->15µm;
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 Gelasian 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, Special Issue. 1: 1-132. gs V O


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dilatata type compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-6-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=441 Go to Archive.is to create a permanent copy of this page - citation notes



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