Arcanodiscus crawfordianus Goeyers & Van de Vijver 2020, sp. nov. ...

• Main Authors: Goeyers, Charlotte, Vijver, Bart Van De
• Format: Text
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Chromista; Ochrophyta; Bacillariophyceae; Arcanodiscales; Arcanodiscaceae; Arcanodiscus; Arcanodiscus crawfordianus; Antarctic; Campbell Island; Crawford; Pacific; Antarc*
• Online Access: https://dx.doi.org/10.5281/zenodo.4329152; https://zenodo.org/doi/10.5281/zenodo.4329152

Arcanodiscus crawfordianus Goeyers & Van de Vijver sp. nov. http://phycobank.org/ 102318 Figs 74–80, 116–124 Etymology The species is named in honor of our colleague Dr Richard M. Crawford to acknowledge his work on melosiroid diatoms. Material examined Holotype CAMPBELL ISLAND • sub-Antarctic region; sample BAS303; 12 Jan. 1970; D. Vitt leg.; BR-4579. Isotype CAMPBELL ISLAND • same collection data as for holotype; slide at University of Antwerp, Belgium; PLP-370. Description Light microscopy (Figs 74–80) To date, frustules in girdle view not observed in LM. Valves strongly silicified, rounded with a thick mantle and clearly convex, weakly domed valve face. Valve dimensions (n = 10): valve diameter 9–18.5 μm. Central area formed by a large, smooth, hyaline zone, 6–11 μm, ca 60% of the total valve diameter, surrounded by a striated, irregularly bordered marginal zone. Thick spines, scattered in the marginal zone distinctly present. Marginal striae discernible in LM, 30–33 in 10 μm. Visible tube processes ... : Published as part of Goeyers, Charlotte & Vijver, Bart Van De, 2020, Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species, pp. 1-30 in European Journal of Taxonomy 694 on pages 13-16, DOI: 10.5852/ejt.2020.694, http://zenodo.org/record/3973347 ...