Chaetoceros Ehrenberg, 1844
Lectotype species: Chaetoceros tetrachaeta Ehrenberg
Original publication: Ehrenberg, C.G. (1844). Einige vorläufige Resultate seiner Untersuchungen der ihm von der Südpolreise des Captain Ross, so wie von den Herren Schayer und Darwin zugekommenen Materialien über das Verhalten des kleinsten Lebens in den Oceanen und den grössten bisher zugänglichen Tiefen des Weltmeeres. Bericht über die zur Bekanntmachung Geeigneten Verhandlungen Der Königl. Preuss. Akademie Der Wissenschaften zu Berlin 1844: 182-207.
Type designated in: Boyer, C.S. (1927). Synopsis of North American Diatomaceae. Part I. Coscinodiscatae, Rhizosolenatae, Biddulphiatae, Fragilariatae. Proceedings of the Academy of Natural Sciences of Philadelphia 78(Suppl.): 1-228.
Description: Generally colonial bipolar centric diatoms. Forms cylindrical cells with an oval or circular base that contain 1, 2 or more chloroplasts. The chloroplasts appear to be quadrangular in cingular view and elliptic or circular in valve view. The mantle is vertical and the cingulum is more or less developed. Processes, called setae, that are of varying thickness emerge from each apex. In the colonial species the terminal setae, those emerging from the last valve in the colony, are distinguished from intercalary setae, those of the internal valves that cross each other and/or fuse at some point, allowing the formation colonies of differing lengths. Specialised intercalary setae are found in some species (C. compressus , C. diversus , C. messanensis), which are different in size and shape from the other setae in the colony. An aperture that varies in size and shape and is delimited by the valve faces and the proximal part of the setae separates the cells of a colony. The valve surface generally has radial costae originating from a central hyaline\transparent annulus. The rimoportula, when present, is located centrally or subcentrally, usually with a short external tube. In the cingulum, the intercalary bands and the pleurae are of the open or segmented type. The setae have a variable ornamentation, often consisting of rows of spines or pores of different sizes. Section compressa Ostenfeld 1903 emend. Yang Li & N. Lundholm (Xu et al., 2019: 116).
Information contributed by: Modified from http://www.szn.it/botanica/database/chaetoceros_en.htm. The most recent alteration to this page was made on 2023-06-08 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Gender: This genus name is currently treated as masculine.
Most recent taxonomic treatment adopted: De Luca, D., Sarno, D., Piredda, R., & Kooistra, W. H. (2019). A multigene phylogeny to infer the evolutionary history of Chaetocerotaceae (Bacillariophyta). Molecular Phylogenetics and Evolution 140(106575): [1-12], 3 figs, 1 table.
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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.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=43689
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 June 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 September 2023