Quaternariella obscura Thomsen 1980 ...

• Main Authors: Thomsen, Helge A., Østergaard, Jette B.
• Format: Text
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Taxonomy; Chromista; Haptophyta; Coccolithophyceae; Coccosphaerales; Calyptrosphaeraceae; Quaternariella; Quaternariella obscura; Antarc*; Antarctica; Greenland
• Online Access: https://dx.doi.org/10.5281/zenodo.12637798; https://zenodo.org/doi/10.5281/zenodo.12637798

Quaternariella obscura Thomsen 1980d (Figs 21–33) This taxon was described based on material from West Greenland (Arctic Station). The main diagnostic feature is packages of rhombohedral crystallites (typically in groups of four) evenly distributed over the entire cell surface. The coccolith base plate scale is circular and rimmed and has a diameter of approx. 0.6 µm (Thomsen 1980d). Evidence is also available documenting the presence of small non mineralized under layer scales (Thomsen 1980d; loc. cit. Fig. 6). Most probably there is a cluster of four crystallites in the centre of each scale. Here we illustrate additional material from the type locality (Figs 21–22) and also document the occurrence of this taxon in NE Greenland (NEW / Figs 23–27) as well as from Antarctica (EPOS / Figs 28–29). Irrespective of the origin of the material the general appearance is very similar. Numerical details have been accounted for in Table 3. We provide here for the first time evidence for the existence of different life ... : Published as part of Thomsen, Helge A. & Østergaard, Jette B., 2015, Coccolithophorids in Polar Waters: Quaternariella and Porsildia gen. nov. Mercedesia gen. nov., Ericiolus,, pp. 155-169 in Acta Protozoologica 54 (3) on pages 161-164, DOI: 10.4467/16890027AP.15.013.3210, http://zenodo.org/record/12638210 ...