Cosmarium taxichondrum var. yamagishii Kanetsuna 2004
Publication Details
Cosmarium taxichondrum var. yamagishii Kanetsuna 2004: 160, figs 21-24, 36-38
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 Cosmarium is Cosmarium undulatum Corda ex Ralfs.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Swamp, Cascatinha, Rio de Janeiro, Brazil; (Kanetsuna 2004: 166) Holotype: (Kanetsuna 2004: 166)
General Environment
This is a freshwater species.
Description
This variety closely resembles the type, but differs in having a linear sinus, approximately four denticulations on each side of lateral margins, four to six granules in the central area and lacking apical and supraisthmial granulis. Cell length 52-57 µm, width 52-56 µm, breadth of isthmus 8.8-13 µm, thickness 25-28 µm. Cells are medium in size, approximately as long as they are broad, deeply constructed in the middle, with a linear sinus. Semicells are trapeziform, apical margin is slightly convex and smooth, lateral margins are convex and convergent with approximately four denticulations on each side. The semicell face is decorated with a row of four to six large granules and many coarse scrobiculations below the apical margin. Chloroplasts have two pyrenoids in each semicell. The side view of semicells circular while the vertical view of semicells is fusiform and poles have acute denticulations.
Created: 01 December 2004 by Sandy Lawson.
Last updated: 27 July 2018
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=65960
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 27 July 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024
