Papposphaera sagittifera cfr. HET ...
P. sagittifera cfr. HET (Figs 27–32) Material from the Weddell Sea EPOS cruise seems in all major details to match the appearance of northern hemisphere P. sagittifera. The two complete cells (Figs 27, 30) are flagellated and both with a curled up haptonema. The coccospheres comprise the usual mixtu...
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| Format: | Text |
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Zenodo
2016
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| Online Access: | https://dx.doi.org/10.5281/zenodo.12534990 https://zenodo.org/doi/10.5281/zenodo.12534990 |
| Summary: | P. sagittifera cfr. HET (Figs 27–32) Material from the Weddell Sea EPOS cruise seems in all major details to match the appearance of northern hemisphere P. sagittifera. The two complete cells (Figs 27, 30) are flagellated and both with a curled up haptonema. The coccospheres comprise the usual mixture of coccoliths with central processes clustered around the flagella and towards the antapical pole. Other coccoliths are devoid of processes and much reminiscent of P. sagittifera body coccoliths in terms of central area calcification (Fig. 31) and the elaboration of the rim (Fig. 32). The calyx (Figs 28–29) is a flaring four-winged rosette similar to that described from Arctic P. sagittifera HET. Each wing has on the interior edge a marked step-wise reduction in size. The identity of this material is still ascertained with some element of doubt. The Antarctic material is characterized by a large degree of coccosphere cohesiveness which means that the number of coccoliths that clearly display the central area ... : Published as part of Thomsen, Helge A., Østergaard, Jette B. & Heldal, Mikal, 2016, Coccolithophores in Polar Waters: HOL Revisited Papposphaera sagittifera HET and, pp. 33-50 in Acta Protozoologica 55 (1) on page 44, DOI: 10.4467/16890027AP.16.005.4046, http://zenodo.org/record/10994318 ... |
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