Papposphaera sagittifera ...
P. sagittifera combination coccospheres (Figs 17–22) Two new occurrences of combination coccospheres from West Greenland are shown in Figs 17, 19. The cell shown in Fig. 17 is particularly appealing because here the two groups of coccoliths have become partly separated to clearly show the morphologi...
| Main Authors: | , , |
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| Format: | Text |
| Language: | unknown |
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Zenodo
2016
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| Online Access: | https://dx.doi.org/10.5281/zenodo.12534979 https://zenodo.org/doi/10.5281/zenodo.12534979 |
| Summary: | P. sagittifera combination coccospheres (Figs 17–22) Two new occurrences of combination coccospheres from West Greenland are shown in Figs 17, 19. The cell shown in Fig. 17 is particularly appealing because here the two groups of coccoliths have become partly separated to clearly show the morphological characteristics of each of them. With reference to the combination coccospheres of P. sagittifera and T. borealis there is one issue of particular concern. It has become apparent that in each of the combination coccospheres illustrated by Thomsen et al. (1991) and also in the two new images reproduced here, the P. sagittifera HET calyx is in fact different from what is typically found in P. sagittifera HET when not forming part of a combination coccosphere. In the P. sagittifera combination coccosphere the four-winged rosette comprises wings that are fairly narrow, hardly ever stepwise elaborated on the inside, and with an angle proximally between the exterior edge of the wing and the connecting line between ... : 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 pages 39-41, DOI: 10.4467/16890027AP.16.005.4046, http://zenodo.org/record/10994318 ... |
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