Holotype species: Climacodium frauenfeldianum Grunow
Taxonomic status: currently recognized as a distinct genus.
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.
According to Gómez et al. (2018: 249), Climacodium and Bellerochea should be placed in the same family, Bellerocheaceae (Lithodesmiales). - (30 Sep 2019) - Wendy Guiry
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 30 Sep 2019 by Wendy Guiry.
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.
Numbers of names and species: There are 5 species names in the database at present, of which 1 has been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..
Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Click here to also show infraspecific names in the list below.
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.
Round, F.E., Crawford, R.M. & Mann, D.G. (1990). The diatoms biology and morphology of the genera. pp. [i-ix], 1-747. Cambridge: Cambridge University Press.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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.
Created: 27 April 2003 by Mairead Murphy
Verified by: 30 September 2019 by Wendy Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=46449
Please cite this record as:
Wendy Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 18 June 2021.