Euastrum hypochondrum f. divergens Y.Kanetsuna 2004
Publication Details
Euastrum hypochondrum f. divergens Y.Kanetsuna 2004: 160, figs 5-7, 31-33 (as 'Euastrum hypochondum var. hypochondrum f. divergens (Couté & Tell) Kanetsuna f. nov.')
Published in: Kanetsuna, Y. (2004). New and interesting desmids (Zygnematales, Chlorophyceae) collected from Brazil and Argentina. Phycological Research 52: 160-167, 47 figs.
Request PDFPublication date: June 2004
Type Species
The type species (lectotype) of the genus Euastrum is Euastrum ansatum Ehrenberg ex Ralfs.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Swamp, Sete Quedas, Paraná, Argentina; (Kanetsuna 2004: 162) Holotype: (Kanetsuna 2004: 162)
General Environment
This is a freshwater species.
Description
This form differs from the type variety by having larger granules, diverging basal margins with four teeth at the tip and open sinus; the vertical view is elliptical and granules are prominent. Cell length 50-70 µm, width 50-80 µm, breadth of isthmus 14-20 µm, thickness 28-32 µm. Cells are approximately equal in length and breadth, lateral lobes are rounded and broad, and greatly extended. The wall is decorated with large granules, with four large teeth at lateral angles. Basal margins diverge, the apex of the apical lobe is flat or slightly retuse, and the sinus is open widely. The semicell face has a circular pattern of granules above the supraisthmial tubercle. In vertical view, semi-cells are broadly elliptical; the basal view of semicells shows four large granules around the isthmus.
Created: 01 December 2004 by Sandy Lawson.
Last updated: 14 January 2019
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=65956
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 14 January 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 16 April 2024
