Nannotax3 - ntax_cenozoic - Pappomonas flabellifera Nannotax3 - ntax_cenozoic - Pappomonas flabellifera

Pappomonas flabellifera


Classification: ntax_cenozoic -> Coccolith families inc sed -> Papposphaeraceae -> Pappomonas -> Pappomonas flabellifera
Sister taxa: P. borealis, P. flabellifera, P. garrisonii, P. weddellensis ⟩⟨ P. sp. type 1, P. sp. type 4, P. sp. type 5 ⟩⟨ P. sp.

Taxonomy:

Citation: Pappomonas flabellifera Manton & Oates, 1975
taxonomic rank: Species
Basionym: Pappomonas flabellifera Manton & Oates 1975 var. flabellifera
Taxonomic discussion: Manton et al. (1976) divided the species into two varieties based on the form of the blades on the process and their geographical distribution:
Thomsen & Ostergaard 2014 separated these two forms as discrete species, based on these characters and larger size of P. borealis body coccoliths (1.0-1.6µm vs 0.6-0.9 µm). They also provided detailed redescription of the species.

Distinguishing features:
Parent taxon (Pappomonas): Coccolith distal rim serrated - elements pentagonal;
Coccosphere dimorphic or trimorphic. Processes only on CFCs coccoliths. Calices with 2-fold symmetry
BCs without axial spine or node

This taxon: CFC with axial cross, spine and flat calyx of two disimilar blades.
BCs 0.6-0.9 µm long, with 3 or 4  longitudinal bars
AACs like CFCs but with lower spine and smaller more symetrical clayx 

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


Morphology:

Typically the calyx is triangular but with one blade smaller than the other, and the process runs into this blade. In other forms the two blades are more similar and quadrate, forming a Y-shaped calyx. 



Size:
Cell 4-6 µm; BCs 0.6-0.9 µm long (Thomsen & Ostergaard 2014)


Ecology & Biogeography

Occurs in Arctic and Antarctic (Thomsen & Ostergaard 2014)

Biology & life-cycles
No combination coccospheres observed but Thomsen & Ostergaard (2014) suggest that the  holococcolith stage is most likely to be Trigonaspis minutissima, based on biogoegraphy.

See also: Trigonaspis minutissima - possible haploid phase;

Search data:
LITHS: murolith, elliptical, CA: concentric-ring(s), ca_disjunct, grill, process,
CSPH: equant, CFC,
Lith size: 0.6->0.9µm;
Data source notes: lith size (BC diameter) from Thomsen & Ostergaard. 2014
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: present in the plankton (Young et al. 2003)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: [JRY rough estimate]

Plot of occurrence data:

References:

Manton, I. & Oates, K. (1975). Fine-structural observations on Papposphaera Tangen from the Southern Hemisphere and on Pappomonas gen. nov. from South Africa and Greenland. British Phycological Journal. 10(1): 93-109. gs

Manton, I., Sutherland, J. & McCully, M. (1976). Fine structural observations on coccolithophorids from South Alaska in the genera Papposphaera Tangen and Pappomonas Manton and Oates. British Phycological Journal. 11: 225-234. gs

Thomsen, H. A. & Buck, K. R. (1998). Nanoflagellates of East Pacific coastal Waters: Morphology, taxonomy, and biogeography of weakly calcified coccolithophorids (Prymnesiophyceae). Cryptogamie Algologie. 19: 29-48. gs

Thomsen, H. A. & Ostergaard, J. B. (2014). Coccolithophorids in polar waters: Pappomonas spp. revisited. Acta Protozoologica. 53: 235-256. gs

Thomsen, H. A. (2016). Baltic Sea coccolithophores – an overview of insights into their taxonomy and ecology from the last 40 years. Journal of Nannoplankton Research. 36(2): 97-119. gs O


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Pappomonas flabellifera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-4-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=991 Go to Archive.is to create a permanent copy of this page - citation notes
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