Cosmarium pseudovariolatum var. majus Kanetsuna 2004
Publication Details
Cosmarium pseudovariolatum var. majus Kanetsuna 2004: 160-167, figs 15-17, 43-45; table 2
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, Transpantaneira, Mato Grosso, Brazil; (Kanetsuna 2004: 166) Holotype: (Kanetsuna 2004: 166)
General Environment
This is a freshwater species.
Description
This variety differs from the type by having semicells with larger dimensions, rectangular basal angles and two pyrenoids. Cell length 81-82.5 µm, width 48-51 µm, breadth of isthmus 13-14.5 µm, thickness approximately 15 µm. Cells are larger than the type, about 1.7 times longer than they are broad, deeply constricted in the middle, and the sinus is closed linearly but is open slightly at the extremity. Semicells are pentagonal with rounded angles, basal angles are rectangular, and lower lateral margins are almost subparallel or converge slightly toward the narrow apex. Cell wall is sparsely and conspicuously scrobiculate above the centre. Side view of semicells is elliptical while vertical view of semicells is broadly elliptical with a thickened wall. Chloroplasts have two pyrenoids in each semicell.
Created: 01 December 2004 by Sandy Lawson.
Last updated: 31 August 2011
Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=65959
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 31 August 2011. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024
