Taxonomy:
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 process ca. 2.0-2.5 µm high, with short stem supporting two large fan-like blades, one markedly larger than the other.
BCs with axial cross +/- extra bars
AACs like CFCs but much smaller spine and calyx
Farinacci & Howe catalog pages: P. weddellensis *
Morphology:
AACs have much reduced symmetrical central processes without a shaft and smaller distal appendages and may have baseplate calcification of 8 radial bars instead of 4.
Size:
Ecology & Biogeography
Biology & life-cycles
LITHS: murolith, elliptical, CA: ca_disjunct, cross-axial, process, CSPH: equant, CFC, |
Lith size: 1->1.5µm; Data source notes: lith size (BC diameter) from OD |
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:
Thomsen, H. A. & Ostergaard, J. B. (2014). Coccolithophorids in polar waters: Pappomonas spp. revisited. Acta Protozoologica. 53: 235-256. gs Thomsen, H. A., Buck, K. R., Coale, S. L., Garrison, D. L. & Gowing, M. M. (1988). Nanoplanktonic coccolithophorids (Prymnesiophyceae, Haptophyceae) from the Weddell Sea, Antarctica. Nordic Journal of Botany. 8: 419-436. gs 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. S1: 1-132. gs References:
Pappomonas weddellensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-12-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1002 Go to Archive.is to create a permanent copy of this page - citation notes |
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