Trigonaspis melvillea

Classification: Coccolithophores -> Holococcoliths -> open-tube -> Trigonaspis -> Trigonaspis melvillea
Sister taxa: P. borealis HOL, T. melvillea, T. minutissima, P. garrisonii HOL, T. sp.,


Citation: Trigonaspis melvilleaThomsen in Thomsen et al. 1988
Rank: Species

Distinguishing features: BCs are only slightly raised above the baseplate.
Tower coccoliths only at flagellar pole, with slender tube ending distally in a single distally directed triangular plate.

Farinacci & Howe catalog pages: Trigonaspis melvillea *

Size: Cell spherical 3-4 µm

Search data:
TagsLITHS: holococcolith, flaring distally, elliptical, sub-circular, cylindrical, hollow, CA: H: fabric-triangular-xtals, vacant, process, PROCESS: flaring, hollow,
CSPH: spherical, equant, CFC, CFC+process, polymorphic, V-UNITS: px-plate, V-prominent, R-UNITS: spine, R-prominent,
MetricsLith size: 0.5->0.8µm; Coccosphere size: 6->8µm;
Sources: lith size (BC diam) from Thomsen et al. 2015; csph size from illustrated specs
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
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in stage). Data source: [JRY rough estimate]

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Trigonaspis


    Thomsen, H. A. & Ostergaard, J. B. (2015). Coccolithophorids in Polar Waters: Trigonaspis spp. revisited. Acta Protozoologica. 54: 85-96. 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, Special Issue. 1: 1-132. gs :: view :: open


    Trigonaspis melvillea compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-7-2020

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    Short stable page link: Go to to create a permanent copy of this page - citation notes

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