149,967 species and infraspecific names are in the database, 20,386 images, 57,648 bibliographic items, 380,221 distributional records.

Chaetoceros Ehrenberg, 1844

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Bacillariophyta
Subphylum Bacillariophytina
Class Mediophyceae
Subclass Chaetocerotophycidae
Order Chaetocerotales
Family Chaetocerotaceae

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.
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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.
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as masculine.

Most recent taxonomic treatment adopted: Hasle, G.R. & Syvertsen, E.E. (1996). Marine diatoms. In: Identifying Marine Phytoplankton. (Tomas, C.R. Eds), pp. 5-385. San Diego: Academic Press.

Nomenclatural notes
Two species were included in the original publication (p. 200): C. dichaeta and C. tetrachaeta, no type was designated. - (13 Jan 2007) - Wendy Guiry

Initially considered feminine (Ehrenberg 1844), then neuter and then masculine (Van Landingham 1968). The genus is treated as masculine here, as are all genera with the suffix "-ceros". In accordance with the Code, genera with the suffix "-ceras" are, however, treated as neuter. - (9 Sep 2012) - M.D. Guiry

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.

Information contributed by: Modified from http://www.szn.it/botanica/database/chaetoceros_en.htm. The most recent alteration to this page was made on 6 Aug 2017 by M.D. Guiry.

Numbers of names and species: There are 259 species names in the database at present, of which 210 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):

Chaetoceros abnormis A.I.Proshkina-Lavrenko C 
Chaetoceros aculeatus I.V.Makarova C 
Chaetoceros adelianus Manguin C 
Chaetoceros adelianus Manguin C 
Chaetoceros adriaticus B.Schussnig U 
Chaetoceros aduncus I.N.Sukhanova C 
Chaetoceros aequatorialis Cleve C 
Chaetoceros affinis Lauder C 
Chaetoceros amanita Cleve-Euler S 
Chaetoceros anastomosans Grunow C 
Chaetoceros anglicus Grunow U 
Chaetoceros angularis Schütt C 
Chaetoceros angulatus F.Schütt S 
Chaetoceros apendiculatus F.C.Müller Melchers C 
Chaetoceros armatus T.West S 
Chaetoceros astrabadicus A.Henckel C 
Chaetoceros asymmetricus J. Fenner in Fenner & Mikkelsen P 
Chaetoceros atlanticus Cleve C 
Chaetoceros audax F.Schütt S 
Chaetoceros audax F.Schütt C 
Chaetoceros aurivillii Cleve C 
Chaetoceros bacteriastrius G.C.Wallich C 
Chaetoceros bacteriastroides Karsten C 
Chaetoceros bermejensis Hernández-Becerril C 
Chaetoceros bisetaceus J.Schumann C 
Chaetoceros borealis Bailey C 
Chaetoceros borealis H.S.Lauder U 
Chaetoceros borealoides Honigmann C 
Chaetoceros borgei Lemmermann C 
Chaetoceros brevis F.Schütt C 
Chaetoceros brevisetus Aksentjev C 
Chaetoceros brightwellii (Cleve) Cleve P 
Chaetoceros brussilowi A.Henckel C 
Chaetoceros buceros Karsten C 
Chaetoceros bulbosus (Ehrenberg) Heiden C 
Chaetoceros bungei Honigmann C 
Chaetoceros calcitrans (Paulsen) H.Takano C 
Chaetoceros californicus Grunow C 
Chaetoceros capensis Karsten C 
Chaetoceros capreolus (Ehrenberg) L.W.Bailey P 
Chaetoceros capricornianus F.J.R.Taylor C 
Chaetoceros caspicus Ostenfeld C 
Chaetoceros castracanei Karsten C 
Chaetoceros cellulosus H.S.Lauder S 
Chaetoceros ceratosporus Ostenfeld C 
Chaetoceros chinchae K.S.Mereschkowsky S 
Chaetoceros chunii G.H.H.Karsten C 
Chaetoceros cinctus Gran C 
Chaetoceros circinalis (Meunier) K.G. Jensen & Moestrup P 
Chaetoceros clavigerus Ostenfeld S 
Chaetoceros clavigerus Grunow P 
Chaetoceros clevei F.Schütt C 
Chaetoceros coarctatus Lauder C 
Chaetoceros cochleus F.Schütt C 
Chaetoceros coloradensis J.Li, Kociolek & Y.H.Gao C 
Chaetoceros compactus F.Schütt C 
Chaetoceros compactus J.Ikari C 
Chaetoceros compressus Lauder C 
Chaetoceros concavicornis L.A.Mangin C 
Chaetoceros confertum F.C.Müller Melchers C 
Chaetoceros confervoides Ralfs C 
Chaetoceros confusus S.L.VanLandingham C 
Chaetoceros constrictus Gran C 
Chaetoceros contortus F.Schütt C 
Chaetoceros convolutus Castracane C 
Chaetoceros cornutus G.Leuduger-Fortmorel C 
Chaetoceros coronatus Gran C 
Chaetoceros costatus Pavillard C 
Chaetoceros crenatus (Ehrenberg) T.Brightwell P 
Chaetoceros crinitus F.Schütt C 
Chaetoceros criophilus Castracane C 
Chaetoceros cruciatus Karsten C 
Chaetoceros curvatus Castracane C 
Chaetoceros curvisetus Cleve C 
Chaetoceros dadayi Pavillard C 
Chaetoceros danicus Cleve C 
Chaetoceros dayaensis Y.Li & S.Zhu C 
Chaetoceros debilis Cleve C 
Chaetoceros decipiens Cleve C 
Chaetoceros delicatulus Ostenfeld C 
Chaetoceros densus (Cleve) Cleve C 
Chaetoceros denticulatus H.S.Lauder C 
Chaetoceros diadema (Ehrenberg) Gran C 
Chaetoceros dichaeta Ehrenberg C 
Chaetoceros dichatoensis Gaonkar, Montresor & Sarno C 
Chaetoceros didymus Ehrenberg C 
Chaetoceros difficilis Cleve C 
Chaetoceros dipyrenops Meunier C 
Chaetoceros distans Cleve S 
Chaetoceros distichum Schütt C 
Chaetoceros distichus F.Schütt C 
Chaetoceros distinguendus Lemmermann C 
Chaetoceros diversicurvatus Goor C 
Chaetoceros diversus Cleve C 
Chaetoceros eibenii Grunow C 
Chaetoceros elmorei Boyer C 
Chaetoceros elongatus Honigmann C 
Chaetoceros exospermus Meunier C 
Chaetoceros externus Gran C 
Chaetoceros fallax Prosckina-Lavrenko C 
Chaetoceros femur F.Schütt C 
Chaetoceros filiferus Karsten C 
Chaetoceros filiformis Meunier C 
Chaetoceros flexuosus Mangin C 
Chaetoceros fragilis Meunier C 
Chaetoceros frickei Hustedt P 
Chaetoceros furcellatus Yendo C 
Chaetoceros furcillatus Bailey C 
Chaetoceros fusus F.Schütt C 
Chaetoceros galvestonensis A.Collier & A.Murphy C 
Chaetoceros gastridius (Ehrenberg) T.Brightwell P 
Chaetoceros gelidus Chamnansinp, Li, Lundholm & Moestrup C 
Chaetoceros glacialis A.Henckel C 
Chaetoceros glandazii Mangin S 
Chaetoceros gobii A.Henckel C 
Chaetoceros gracilis Apstein S 
Chaetoceros gracilis F.Schütt C 
Chaetoceros gracilis Pantocsek C 
Chaetoceros grunowii F.Schütt S 
Chaetoceros hendeyi Manguin C 
Chaetoceros hirtisetus (Rines & Hargreaves) Chamnansinp, Moestrup & Lundholm C 
Chaetoceros hirundinellus S.Qian C 
Chaetoceros hispidus (Ehrenberg) T.Brightwell P 
Chaetoceros hohnii Graebn.& Wujek C 
Chaetoceros holsaticus F.Schütt C 
Chaetoceros ikari Skvortzov C 
Chaetoceros imbricatus Mangin C 
Chaetoceros incurvus Bailey P 
Chaetoceros indicus Karsten C 
Chaetoceros indicus R.Subrahmanyan C 
Chaetoceros ingolfianus Ostenfeld C 
Chaetoceros insignis Proschkina-Lavrenko U 
Chaetoceros intermedius A.Henckel C 
Chaetoceros invisibilis R.M. Gogorev & I.V.Makarova in Gogorev & al. P 
Chaetoceros jouseanus R. M. Gogorev C 
Chaetoceros juetlandicus J.Fenner C 
Chaetoceros karianus Grunow C 
Chaetoceros karyanus A.Henckel C 
Chaetoceros knipowitschii Henckel C 
Chaetoceros komarovii Woronichin C 
Chaetoceros laciniosus F.Schütt C 
Chaetoceros laevis Leuduger-Fortmorel C 
Chaetoceros lauderi Ralfs ex Lauder C 
Chaetoceros leve F.Schütt C 
Chaetoceros litoralis Lemmermann C 
Chaetoceros lorenzianus Grunow C 
Chaetoceros lorenzii Grunow U 
Chaetoceros makarovae R. M. Gogorev P 
Chaetoceros malygini A.Henckel C 
Chaetoceros medius F.Schütt C 
Chaetoceros meridiana (F.Schütt) G.Karsten P 
Chaetoceros mertensii Honigmann C 
Chaetoceros messanensis Castracane C 
Chaetoceros minimus (Levander) D.Marino, G.Giuffre, M.Montresor & A.Zingone C 
Chaetoceros minutissimus Makarova & Proshkina-Lavrenko C 
Chaetoceros misumensis H.H.Gran & K.Yendo C 
Chaetoceros mitra (Bailey) Cleve C 
Chaetoceros monicae A.Grunow S 
Chaetoceros muelleri Lemmermann C 
Chaetoceros najadianus B.Schussnig U 
Chaetoceros nansenii A.Henckel C 
Chaetoceros natatus Manguin P 
Chaetoceros neglectus Karsten C 
Chaetoceros neobulbosus T.V.Desikachary, S.Gowthaman & Y.Latha P 
Chaetoceros neocompactus VanLandingham C 
Chaetoceros neogracilis S.L.VanLandingham C 
Chaetoceros neupokojewii A.Henckel C 
Chaetoceros nipponicus J.Ikari C 
Chaetoceros odessanus Aksentjev C 
Chaetoceros okamurae J.Ikari C 
Chaetoceros orientale Schiller C 
Chaetoceros pachtussowii A.Henckel C 
Chaetoceros pacificus J.Ikari C 
Chaetoceros paradoxus Cleve C 
Chaetoceros parvus F.Schütt C 
Chaetoceros paulsenii Ostenfeld C 
Chaetoceros pavillardii J.Ikari C 
Chaetoceros pelagicus Cleve C 
Chaetoceros pendulus Karsten C 
Chaetoceros perpusillus Cleve C 
Chaetoceros peruvianus Brightwell C 
Chaetoceros peruvioatlanticus Karsten S 
Chaetoceros phuketensis J.E.B.Rines, P.Boonruang & E.C.Theriot C 
Chaetoceros pinguichaetus A.Henckel & P.Henckel C 
Chaetoceros pinguis A.Henckel C 
Chaetoceros pliocenus J.-J.Brun C 
Chaetoceros polygonus F.Schütt S 
Chaetoceros procerus F.Schütt C 
Chaetoceros proschkinae Gogorev C 
Chaetoceros protuberans Lauder C 
Chaetoceros pseudoaurivillii J.Ikari C 
Chaetoceros pseudobrevis Pavillard C 
Chaetoceros pseudocrinitus Ostenfeld C 
Chaetoceros pseudocurvisetus Mangin C 
Chaetoceros pseudodichaetus J.Ikari C 
Chaetoceros pseudosimilis A.Cleve C 
Chaetoceros pundulus Karsten C 
Chaetoceros quillensis L.W.Bailey U 
Chaetoceros radians F.Schütt S 
Chaetoceros radicans F.Schütt C 
Chaetoceros ralfsii Schütt S 
Chaetoceros ralfsii Cleve S 
Chaetoceros recurvatus Henckel C 
Chaetoceros rigidus Ostenfeld C 
Chaetoceros robustus (Cleve) Ostenfeld P 
Chaetoceros rostratus Ralfs C 
Chaetoceros rotosporus Li, Lundholm & Moestrup C 
Chaetoceros rude Leuduger-Fortmorel U 
Chaetoceros russanowii A.Henckel C 
Chaetoceros salsugineus Takano C 
Chaetoceros saltans Cleve C 
Chaetoceros schmidtii C.E.H.Ostenfeld C 
Chaetoceros schuettii Cleve C 
Chaetoceros secundus Cleve C 
Chaetoceros seiracanthus Gran C 
Chaetoceros septentrionalis Østrup S 
Chaetoceros sessile Grøntved C 
Chaetoceros setoensis J.Ikari C 
Chaetoceros seychellarum Karsten C 
Chaetoceros siamensis Ostenfeld C 
Chaetoceros sigmo-calamus J.A.Tempère & J.-J.Brun U 
Chaetoceros similis Cleve C 
Chaetoceros simplex Ostenfeld C 
Chaetoceros skeleton F.Schütt S 
Chaetoceros socialis H.S.Lauder C 
Chaetoceros solitarius (Cleve) Cleve S 
Chaetoceros spirillum (Castracane) De Toni S 
Chaetoceros sporotruncatus Gaonkar, Kooistra & Lange C 
Chaetoceros ssedowii A.Henckel C 
Chaetoceros strictus Karsten C 
Chaetoceros subcompressus J.L.B.Schröder C 
Chaetoceros subsalsus Lemmermann S 
Chaetoceros subsecundus (Grunow ex Van Heurck) Hustedt C 
Chaetoceros subtilis Cleve C 
Chaetoceros subtortilis Proshkina-Lavrenko C 
Chaetoceros sumatranus Karsten C 
Chaetoceros tenuissimus Meunier C 
Chaetoceros teres Cleve C 
Chaetoceros tetrachaeta Ehrenberg C - type
Chaetoceros tetras G.H.H.Karsten C 
Chaetoceros tetrastichon Cleve C 
Chaetoceros thienemannii Hustedt C 
Chaetoceros throndsenii (Marino, Montresor, & Zingone) Marino, Montresor & Zingone C 
Chaetoceros titicacaensis Frenguelli P 
Chaetoceros tortissimus Gran C 
Chaetoceros transisetus J.R.Johansen & J.S.Boyer, Jr. C 
Chaetoceros vanheurckii Gran C 
Chaetoceros vermiculatus F.Schütt S 
Chaetoceros vermiculus F.Schütt C 
Chaetoceros villosus Kützing C 
Chaetoceros vistulae Apstein C 
Chaetoceros vixvisibilis Schiller C 
Chaetoceros volans F.Schütt C 
Chaetoceros weissflogii F.Schütt S 
Chaetoceros wighamii Brightwell C 
Chaetoceros willei Gran C 
Chaetoceros xishaensis Y.C.Kuo, J.Ye & H.Zhou C 
Chaetoceros zachariasii Honigmann C 
Chaetoceros ziwolkii A.Henckel C 

References
Hustedt, F. (1930). Bacillariophyta (Diatomeae) Zweite Auflage. In: Die Süsswasser-Flora Mitteleuropas. Heft 10. (Pascher, A. Eds), pp. [i]-vii, [1]-466. Jena: Verlag von Gustav Fischer.

Scott, F.J. & Thomas, D.P. (2005). Diatoms. In: Antarctic marine protists. (Scott, F.J. & Marchant, H.J. Eds), pp. 13-201. Canberra & Hobart: Australian Biological Resources Study; Australian Antarctic Division.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

Contributors
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: 11 April 2002 by M.D. Guiry

Verified by: 06 August 2017 by M.D. Guiry

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Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 November 2017.

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