Edtheriotia Kociolek, Q.M.You, Stepanek, R.L.Lowe et Q-X. Wang,, 2016

Holotype species: Edtheriotia guizhoiana Kociolek, Q.M.You, Stepanek, R.L.Lowe & Q.X.Wang

Original publication and holotype designation: Kociolek, J.P., You, Q.M., Stepanek, J.G., Lowe, R.L. & Wang, Q.X. (2016). New freshwater diatom genus, Edtheriotia gen. nov. of the Stephanodiscaceae (Bacillariophyta) from south-central China. Phycological Research 64: 274-280, 28 figs.

Description: Valves circular, with valve face flat. A narrow unornamented area is located near the valve margin internally. Valve face externally has rows of siliceous granules aligned with the striae. Near the margins externally there are fine poroids, and star-shaped to rounded granules. Areolae locular, open externally with round foramina, they are occluded internally by individual domed cribra on the valve face. Individual areolae around the valve margin are without occlusions. Externally areolae arranged in radial rows of unequal length, separated by hyaline, non-thickened strips. These hyaline areas are wider in the center of the valve, narrower at the margin and onto the mantle. Marginal fultoportulae distinct, internally each with two arcuate opercles, located on a costa (which may be bifurcated) or between two costae. External fultoportula openings are distinct, as a thickened short tube, with 1–3, sessile to slightly raised rimportulae are present on the valve face, not located at the end of a shortened stria. External fultoportula opening wider than areolae, but external tube is wanting.

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 2016-10-30 by M.D. Guiry.

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

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=52126

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 30 October 2016. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 April 2024