Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
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Current identification/main database link: Pavlova calceolata van der Veer 1976
Compiled data
Original Description
Two unequal heterodynamic flagella and a thin haptonema arising ventrally close together from the posterior part of the depression. One flagellum 6-10 ≤m long, in rest sinuately coiled, clad with very small stellate particles and long spreading hairs. The other flagellum 2-3 µm long, generally flexed backwards, with long spreading hairs. Haptonema 1-2 µm long. A single chloroplast, parietal, pale yellow-green, with four lobes projecting from the dorsally positioned isthmus, and with an eyespot on the edge near the flagellar insertion.
A pit entering the cell near the base of the long flagellum, terminating in a globose sac.
Two vacuoles with reserve materials in the posterior part of the cell.
Dome-shaped vesicles of varying size irregularly distributed in the outer layer of cytoplasm.
Extra details from original publication
TABLE 1. DIFFERENCES BETWEEN P. calceolata and P. gyrans
Pavlova gyrans
Pavlova calceolata
Flagellar particles with median constriction
Flagellar particles stellate
Body particles nearly spherical
Body particles absent
Chloroplast bilobed, flexed
Chloroplast tetralobed
Pyrenoid present
Pyrenoid absent
Stigma inwardly facing
Stigma outwardly facing
Pit: tube-shaped, curved towards stigma
Pit: a narrow canal with globose ending, not associated with stigma
Van Der Veer, J. (1976). Pavlova calceolata (Haptophyceae), a new species from the Tamar Estuary, Cornwall, England. Journal of the Marine Biological Association of the United Kingdom. 56: 21-30. gsReferences:
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Pavlova calceolata: Catalog entry compiled by Jeremy Young. Viewed: 17-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=54740 Go to Archive.is to create a permanent copy of this page - citation notes |
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