Climacodium Grunow, 1868

Holotype species: Climacodium frauenfeldianum Grunow

Description: Cells H-shaped, joined by the extended valve apices to form straight filaments. Plastids numerous, discoid. A marine plankton genus mainly distributed in tropical/sub-tropical oceanic waters. Valves narrow with apical processes and deep mantles without obvious linking structures at apices of the processes. The valve surface appears structureless in the SEM, except for a small, rimmed pore midway between the two processes. This pore may not be present on all valves and varies in its appearance. Cingulum not observed and may be lacking except during division (Hustedt, 1927-66). Only an indistinct line indicates the junction between the two thecae of a cell.

The most recent alteration to this page was made on 2019-09-30 by Wendy Guiry.

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

Most recent taxonomic treatment adopted: Gómez, F., Wang, L. & Lin, S. (2018). Molecular phylogeny suggests the affinity of the planktonic diatoms Climacodium and Bellerochea (Lithodesmiales, Mediophyceae). Diatom Research 33(3): 349-354.

Comments: Cells are presumably linked into filaments by mucilage extrusion at the apices of the processes. Apart from the type species only one other valid species, C. biconcavum Cleve, has been described - originally as Eucampia. The genus is in need of study; TEM is necessary to determine the nature of the valve though there may be no areolation and little silicification. Its taxonomic position near Eucampia is based merely on general form and a thorough study esepcially of cultured material (cf. that on Streptocheca by von Stosch) should be made.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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

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Wendy Guiry in Guiry, M.D. & Guiry, G.M. 30 September 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 15 June 2024

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