Trigonaspis Thomsen 1980 ...
Trigonaspis Thomsen 1980a The original description of this holococcolithophorid genus as reproduced below was based on material from West Greenland: Small biflagellate coccolithophorids with a short haptonema. Periplast composed of coccoliths which are tower-like near the flagellar pole. Coccolith c...
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| Format: | Text |
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Zenodo
2015
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| Online Access: | https://dx.doi.org/10.5281/zenodo.12637886 https://zenodo.org/doi/10.5281/zenodo.12637886 |
| Summary: | Trigonaspis Thomsen 1980a The original description of this holococcolithophorid genus as reproduced below was based on material from West Greenland: Small biflagellate coccolithophorids with a short haptonema. Periplast composed of coccoliths which are tower-like near the flagellar pole. Coccolith crystallites small triangular plates composed of three subunits. Small organic scales, always unmineralized, appear below the coccolith base-plates. Type species: Trigonaspis diskoensis The key characteristics are dimorphic (occasionally varimorphic) coccoliths that involves a tuft of tower-shaped coccoliths encircling the flagellar pole, and above all the monolayer of triangular crystallite groups that cover all coccolith surfaces. The most closely related genus is Turrisphaera Manton et al. 1976b which is distinguished from Trigonaspis based on the presence of hexangular rather than triangular crystallite groups. Circumstantial evidence in support of this distinction has subsequently come from the discovery of ... : Published as part of Thomsen, Helge A. & Østergaard, Jette B., 2015, Coccolithophorids in Polar Waters: Trigonaspis spp. Revisited, pp. 85-96 in Acta Protozoologica 54 (2) on pages 86-87, DOI: 10.4467/16890027AP.15.007.2732, http://zenodo.org/record/12638290 ... |
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