Citation: Pappomonas flabellifera Manton & Oates, 1975taxonomic rank: SpeciesBasionym: Pappomonas flabellifera Manton & Oates 1975 var. flabelliferaTaxonomic 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:
Pappomonas flabellifera Manton & Oates 1975 var. flabellifera -process Y-shaped, or triangular with dissimilar blades described from S. Africa. AACs have short process
Pappomonas flabellifera var. borealis Manton, Sutherland & McCully 1976 - process triangular formed of two simlar blades with serrated end, described from Greenland.
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
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.
Ecology & BiogeographyOccurs in Arctic and Antarctic (Thomsen & Ostergaard 2014) Biology & life-cyclesNo combination coccospheres observed but Thomsen & Ostergaard (2014) suggest that the holococcolith stage is most likely to be Trigonaspis minutissima, based on biogoegraphy.
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:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Pappomonas
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. gsO
Pappomonas flabellifera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-10-2024
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