Bellerochea Van Heurck, 1885
Holotype species: Bellerochea malleus (Brightwell) Van Heurck
Original publication and holotype designation: Van Heurck, H. (1885). Synopsis des Diatomées de Belgique. Texte. pp. 1-235. Anvers: Martin Brouwers & Co.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: 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.
According to Gómez et al. (2018: 249), Climacodium and Bellerochea should be placed in the same family, Bellerocheaceae (Lithodesmiales). - (30 Sep 2019) - Wendy Guiry
Emended by von Stosch (Daly Yahia-Kéfi et al., 2005: 59). - (17 Oct 2006) - Wendy Guiry
Description: Cells rectangular in girdle view, joined to form long filaments in which small gaps occur between cells due to curvature of the valve faces. Cells weakly silicified. Plastids numerous small plates. A widely distributed marine, planktonic genus, containing three species. Valves triangular (sometimes bi- or quadrangular); valve face depressed slightly internal to the angles. Face and girdle formed by an open meshwork of siliceous costae radiating from a central annulus, or not even reaching the centre (B. malleus); costae sometimes forming small 'C' shaped swirls. Minor costae link the principal ones to delimit areolae; no vela can be detected. At the junction between valve face/mantle a slight marginal ridge is developed and at the angles (elevations) of the valve there is what appears to be an ocellus, with distinct longitudinal ridges. The marginal ridges interlock or even fuse with those of adjacent cells. Rather delicate rimoportulae occur (arrows) either centrally or marginally; they have long external tubes. Elements of the cingulum numerous but even more lightly silicified than the valves and we have not been able to resolve any detail (but see von Stosch, 1977).The most recent alteration to this page was made on 30 Sep 2019 by Wendy Guiry.
Comments: The genus is discussed in great detail in the excellent study of von Stosch (1977) who discusses the diatotepic layer forming a 'wall' internal to the siliceous framework. The only point we can add and which is significant is the possible formation of an ocellus which, if confirmed, will require a re-assessment of the classification of this genus and possibly ally it to genera of the Hemiaulales rather than the Lithodesmiales.
Numbers of names and species: There are 6 species names in the database at present, as well as 4 infraspecific names. Of the species names, 4 have 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.
Daly Yahia-Kéfi, O., Souissi, S., De Stefano, M.& Yahia, Daly M.N. (2005). Bellerochea horologicalis and Lithodesmioides polymorpha var. tunisiense var. nov. (Coscinodiscophyceae, Bacillariophyta) in the Bay of Tunis: ultrastructural observations and spatio-temporal distribution . Botanica Marina 48: 58-72.
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.
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: 23 April 2002 by M.D. Guiry
Verified by: 30 September 2019 by Wendy Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44361
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 14 April 2021.