Vikingea Witkowski, Lange-Bertalot & Metzeltin, 2000

Holotype species: Vikingea gibbocalyx (Brun) Witkowski, Lange-Bertalot & Metzeltin

Original publication and holotype designation: Witkowski, A., Lange-Bertalot, H. & Metzeltin, D. (2000). Diatom flora of marine coasts I. Iconographia Diatomologica 7: 1-925, incl. 219 pls with 4504 figs.

Description: Frustules in girdle view rectangular, constricted with distinctly raised apices. Valves rhombiclanceolate to linear-elliptic with one raphe valve and one rapheless valve. RLV: in general valve convex with the margin raised to form a siliceous rib surrounding the whole valve. Valve surface in general convex with apices depressed below the valve face level. Sternum distinct, linear to narrowly lanceolate. Transapical striae composed of large, rectangular to square areolae crossed by apically oriented ribs. At each side of the sternum close to the valve margin two horse shoe-like structures occur. RV: surface concave with distinctly raised apices, resembling horns. Raphe straight, external endings simple, expanded, terminal endings hooked in a polar position. Axial area linear, central area large oblong or transversely expanded in form of a fascia reaching the valve margins. Transapical striae composed of numerous circular areolae.

Origin of description: this description is from the original publication; it may have been modified slightly. The most recent alteration to this page was made on 2020-02-12 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Cox, E.J. (2015). Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae (Diatoms). In: Syllabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. 13th Ed. Photoautotrophic eukaryotic algae Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Heterokontophyta/Ochrophyta, Chlorarachniophyta/Cercozoa, Euglenophyta/Euglenozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 64-103. Stuttgart: Borntraeger Science Publishers.

Comments: "The generic name is derived from horn-like, raised apices of the raphe valve, resembling in a girdle view a Viking's helmet. The new generic name is dedicated to our colleagues from Scandinavia and Mr. Sven Koeltz, whose identification with Scandinavia is very tight."

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=47243

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 12 February 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 April 2024