Nannotax3 - ntax_cenozoic - Pappomonas vexillata Nannotax3 - ntax_cenozoic - Pappomonas vexillata

Pappomonas vexillata

Classification: ntax_cenozoic -> Coccolith families inc sed -> Papposphaeraceae -> Papposphaera -> Pappomonas vexillata
Sister taxa: P. lepida, P. obpyramidalis, P. vexillata ⟩⟨ P. sp. type 1, P. sp. type 4, P. sp. type 5, P. sp. type 6, P. sp. type 2 ⟩⟨ P. sagittifera, P. sarion, P. arctica, P. iugifera, P. heldalii ⟩⟨ P. thomsenii, P. bourrellii, P. sp. type 3, P. sp. cf. type 3, P. sp. type 3 ⟩⟨ P. simplicissima ⟩⟨ P. sp.


Citation: Pappomonas vexillata Keuter et al. 2021
taxonomic rank: species
Taxonomic discussion: Described in Pappomonas but possibly should be in Papposphaera.

Distinguishing features:
Parent taxon (Papposphaera): Coccolith distal rim serrated - elements pentagonal;
Coccosphere varimorphic, or dimorphic. All coccoliths have spines but CFCs typically have longer spines and larger calices.

This taxon: Central area with axial cross supporting spine with oblique triangular calyx.
Varimorphic - spines higher and porcesses larger at flagellar pole

Farinacci & Howe catalog pages: P. vexillata [no catalog entry yet]


Diagnosis A papposphaeracean species with a dimorphic coccosphere. All coccoliths bear leaf-like appendages. The flattened calyxes consisting of two dissimilar elements are held in a tilted position with reference to the central process. The appendages of the CFCs are higher and bear two blade-like elements, while those of the BC are smaller and bear triangular and rod-shaped elements.

Coccoliths: Round to weakly elliptical and 0.8−1.0 × 1.0−1.2μm in size. Rim of typical Papposphaeracea type,with serrated uper margin. Central area spanned by axial cross supporting process with calyx formed of a triangular plate. Coccosphere: varimorphic - process height and calyx size increases toward the flagellar pole.

Ecology & Biogeography

The species was routinely observed during a 2-year survey of the Gulf of Aqaba (Keuter et al. 2021)

Search data:
LITHS: murolith, circular, elliptical, CA: cross-axial, ca_disjunct, process,
CSPH: equant, CFC,
Lith size: 1->1.2µm; Coccosphere size: 4->6µm; Liths per sphere: 50->70
Data source notes: Keuter et al. 2021, & slightly extended
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:
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source:

Plot of occurrence data:


Keuter, S., Young, J. R., Koplovitz, G., Zingone, A. & Frada, M. J. (2021). Novel heterococcolithophores, holococcolithophores and life cycle combinations from the families Syracosphaeraceae and Papposphaeraceae and the genus Florisphaera. Journal of Micropalaeontology. 40: 75-99. gs O


Pappomonas vexillata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-7-2024

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Comments (1)

Josue Millan(US)

Dr Jelena Godrijan micrograph.