149,969 species and infraspecific names are in the database, 20,386 images, 57,652 bibliographic items, 380,224 distributional records.

Acrochaetium Nägeli, 1858

Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Nemaliophycidae
Order Acrochaetiales
Family Acrochaetiaceae

Lectotype species: Acrochaetium secundatum (Lyngbye) Nägeli

Original publication:Nägeli, C. & Cramer, C. (1858). Die Stärkekörner: Morphologische, physiologische, chemisch-physicalische und systematisch-botanische Monographie. Pflanzenphysiologische Untersuchungen. 2. Heft. pp. [i]-x, [1]-623, pls XI-XXVI. Zürich: bei Fredrich Schultness.
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Type designated in Woelkerling, W.J. (1983). The Audouinella (Acrochaetium-Rhodochorton) complex (Rhodophyta): present perspectives. Phycologia 22: 59-92, 22 figs, 10 tables.

Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Harper, J.T. & Saunders, G.W. (2002). A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov.. British Phycological Journal 37: 463-475.

Taxonomic notes
Harper & Saunders (2002) circumscribed this genus for marine species with monosporangia and stellate chloroplasts. - (5 Oct 2010) - M.D. Guiry

Description: Plants uniseriate filamentous, ecorticate, in general of small dimensions, rarely over 5 mm high. Cells with a single centrally located stellate chloroplast and a central pyrenoid, rarely more than one. Species with known life history with markedly heteromorphic generations; gametophytes with unicellular base and 1-6 erect axes, tetrasporophytes with a septately germinated spore and a multicellular filamentous base producing few to many upright axes. Branching of erect axes in both generations irregular, secund or opposite; unicellular hairs sometimes present. Sexual plants monoecious or dioecious. Spermatangia in small clusters. Carpogonia sessile or pedicellate, distinct carpogonial filament absent. Development of carposporophyte direct. Fertilized carpogonium dividing transversely, sometimes remaining undivided. Carposporophytes small, globose, producing few to several terminal carpospores; sterile involucre absent. Tetrasporangia formed in terminal or lateral positions on erect axes and laterals; sporangia cruciately divided. Asexual reproduction by means of monosporangia occurring in both generations, in many species the only form of propagation known. Emended by J.T. Harper & G.W. Saunders (2002: 470). Now comprises marine spp. [Audouinella comprises freshwater spp.]

Information contributed by: H. Stegenga. The most recent alteration to this page was made on 20 Jan 2017 by M.D. Guiry.

Comments: Worldwide, almost exclusively marine, most diversified in temperate areas, especially the North Atlantic. Plants often epiphytic on other algae or marine angiosperms, sometimes epizoic, semi-endophytic or semi-endozoic. See Harper & Saunders (2002: 470).

Numbers of names and species: There are 263 species names in the database at present, of which 171 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):

Acrochaetium acanthophora Aziz C 
Acrochaetium actinocladum I.A.Abbott C 
Acrochaetium affine M.Howe & Hoyt C 
Acrochaetium agardhiellae A.B.Joly & Cordeiro C 
Acrochaetium alacranense Aziz C 
Acrochaetium alariae (Jónsson) Bornet C 
Acrochaetium alcyonidii C.-C.Jao S 
Acrochaetium amahatanum S.Kumano C 
Acrochaetium americana (C.-C.Jao) Papenfuss S 
Acrochaetium americanum (C.-C.Jao) Papenfuss S 
Acrochaetium amphiroae (K.M.Drew) Papenfuss S 
Acrochaetium angustum (K.M.Drew) Papenfuss C 
Acrochaetium antillarum W.R.Taylor C 
Acrochaetium arcuatum (K.M.Drew) C.K.Tseng C 
Acrochaetium armoricanum Feldmann C 
Acrochaetium arnoldii Weber-van Bosse C 
Acrochaetium asparagopsis (Chemin) Papenfuss S 
Acrochaetium attenuatum (Rosenvinge) Hamel C 
Acrochaetium avrainvilleae Børgesen C 
Acrochaetium bahreinii Børgesen C 
Acrochaetium balliae (Stegenga) Stegenga, Bolton & R.J.Anderson C 
Acrochaetium balticum (Rosenvinge) Aleem & Schulz C 
Acrochaetium barbadense (Vickers) Børgesen C 
Acrochaetium battersianum Hamel C 
Acrochaetium bengalicum A.K.Islam & A.Aziz C 
Acrochaetium bisporum (Børgesen) Børgesen S 
Acrochaetium blomquistii Aziz C 
Acrochaetium boergesenii Schiffner C 
Acrochaetium boergesenii S.P.Singh, R.K.Tiwari, & D.C.Pandey S 
Acrochaetium bonnemaisoniae (Batters) Feldmann & G.Feldmann S 
Acrochaetium bornetii Papenfuss S 
Acrochaetium botryocarpum (Harvey) J.Agardh S 
Acrochaetium brebneri (Batters) Hamel C 
Acrochaetium bulbosa Hamel C 
Acrochaetium byssaceum (Kützing) Nägeli C 
Acrochaetium caesareae Feldmann C 
Acrochaetium caespitiforme Børgesen C 
Acrochaetium caespitosum (J.Agardh) Nägeli S 
Acrochaetium canariense Børgesen C 
Acrochaetium candelabrum Børgesen C 
Acrochaetium catenulatum M.Howe C 
Acrochaetium chaetomorphae (Tanaka & Pham-Hoàng Hô) Heerebout C 
Acrochaetium champiae P.Anand C 
Acrochaetium cheminii Feldmann U 
Acrochaetium chondriae Aziz C 
Acrochaetium chylocladiae (Batters) Batters S 
Acrochaetium clandestinum (Montagne) M.Howe C 
Acrochaetium codicola Børgesen S 
Acrochaetium codii Hamel S 
Acrochaetium colaconemoides Pham-Hoàng Hô C 
Acrochaetium collopodum (Rosenvinge) Hamel C 
Acrochaetium comptum Børgesen S 
Acrochaetium concavum (F.Schmitz & Heydrich) Setchell & Gardner C 
Acrochaetium corymbiferum (Thuret) Batters C 
Acrochaetium crassipes (Børgesen) Børgesen C 
Acrochaetium curtum Baardseth C 
Acrochaetium cymopoliae Børgesen C 
Acrochaetium cytophagum (Rosenvinge) Hamel C 
Acrochaetium dasyae Collins S 
Acrochaetium daviesii (Dillwyn) Nägeli S 
Acrochaetium delisea Aziz C 
Acrochaetium densum (K.M.Drew) Papenfuss S 
Acrochaetium desmarestiae Kylin S 
Acrochaetium dictyopteridis Hamel & Hamel-Joukov U 
Acrochaetium dictyotae Collins S 
Acrochaetium discoideum Børgesen C 
Acrochaetium distichosporum Dawson, Acleto & Foldvik C 
Acrochaetium domerguei Hamel & Hamel-Joukov U 
Acrochaetium dotyi I.A.Abbott C 
Acrochaetium doumerquei Hamel & Hamel-Joukov C 
Acrochaetium drewiae Baardseth C 
Acrochaetium duboscqii Feldmann C 
Acrochaetium dufourii Børgesen S 
Acrochaetium dufourii Collins S 
Acrochaetium dumontiae (Rosenvinge) Hamel C 
Acrochaetium dwarkense Børgesen C 
Acrochaetium eastwoodiae (Setchell & N.L.Gardner) Papenfuss C 
Acrochaetium efflorescens (J.Agardh) Nägeli S 
Acrochaetium effusum Levring C 
Acrochaetium elegans (K.M.Drew) Papenfuss S 
Acrochaetium emergens (Rosenvinge) Weber-van Bosse S 
Acrochaetium endophyticum Batters S 
Acrochaetium endozoicum (Darbishire) Batters C 
Acrochaetium entophyticum Batters C 
Acrochaetium epispiculum A.B.Joly & Cordeiro C 
Acrochaetium epizooicum A.A.Aleem C 
Acrochaetium erectum Børgesen C 
Acrochaetium ernothrix Børgesen C 
Acrochaetium extensum Ercegovic C 
Acrochaetium fernandezianum (Levring) Papenfuss C 
Acrochaetium flexuosum Vickers C 
Acrochaetium fuegiense Kylin C 
Acrochaetium galaxaurae Aziz C 
Acrochaetium globosum Børgesen C 
Acrochaetium godwardense R.J.Patel S 
Acrochaetium gracile Børgesen S 
Acrochaetium grande (Levring) Papenfuss C 
Acrochaetium grateloupiae E.Y.Dawson C 
Acrochaetium griffithsianum Nägeli S 
Acrochaetium gynandrum (Rosenvinge) Hamel S 
Acrochaetium hallandicum (Kylin) Hamel S 
Acrochaetium hamelii Feldmann C 
Acrochaetium hancockii (E.Y.Dawson) Papenfuss C 
Acrochaetium hauckii Schiffner S 
Acrochaetium hlulekaense Stegenga C 
Acrochaetium homorhizum Børgesen C 
Acrochaetium hormorhizum Børgesen C 
Acrochaetium howei (Yamada) Papenfuss C 
Acrochaetium hoytii Collins C 
Acrochaetium humile (Rosenvinge) Børgesen C 
Acrochaetium hummii Aziz C 
Acrochaetium hyalosiphoniae (Nakamura) Papenfuss S 
Acrochaetium hypneae (Børgesen) Børgesen S 
Acrochaetium imitator I.A.Abbott C 
Acrochaetium immersum (Rosenvinge) Hamel C 
Acrochaetium inclusum (Levring) Papenfuss C 
Acrochaetium incrassatum Ercegovic C 
Acrochaetium indica S.K.S.Raikwar S 
Acrochaetium infestans M.Howe & Hoyt S 
Acrochaetium inkyui Y.-P.Lee C 
Acrochaetium intermedium C.-C.Jao S 
Acrochaetium interpositum (Heydrich) Børgesen C 
Acrochaetium irregulare (Reinsch) comb. ined. C 
Acrochaetium islamii Aziz C 
Acrochaetium iyengarii Børgesen C 
Acrochaetium jamaicense V.J.Chapman C 
Acrochaetium japonicum Papenfuss C 
Acrochaetium jonsonii Papenfuss S 
Acrochaetium jonssonii Papenfuss S 
Acrochaetium keralayense L.Jose & R.J.Patel S 
Acrochaetium krusadii Børgesen C 
Acrochaetium kuckuckianum Hamel C 
Acrochaetium kurilense (Nagai) Papenfuss C 
Acrochaetium kurogii (Y.P.Lee & Lindstrom) Y.P.Lee & I.K.Lee C 
Acrochaetium kylinii Hamel C 
Acrochaetium kylinioides Feldmann C 
Acrochaetium laminariae Feldmann U 
Acrochaetium lanuginosum (Dillwyn) Nägeli S 
Acrochaetium lauterbachii (F.Schmitz & Heydrich) Hamel C 
Acrochaetium laxum I.A.Abbott C 
Acrochaetium lenormandii (Suhr ex Kützing) Nägeli S 
Acrochaetium leptonema (Rosenvinge) Børgesen C 
Acrochaetium leptonemoides Levring C 
Acrochaetium levringii Papenfuss C 
Acrochaetium liagorae Børgesen C 
Acrochaetium liagoraefilum Børgesen C 
Acrochaetium liagoroides Børgesen C 
Acrochaetium lorrain-smithiae (Lyle) L.Newton C 
Acrochaetium luxurians (J.Agardh ex Kützing) Nägeli C 
Acrochaetium macropoda P.J.L.Dangeard C 
Acrochaetium macropus Kylin C 
Acrochaetium macula (Rosenvinge) Hamel C 
Acrochaetium madinae Hamel & Hamel-Joukov C 
Acrochaetium madininae Hamel & Hamel-Joukov U 
Acrochaetium magnificum (Drew) Papenfuss P 
Acrochaetium mahumetanum Hamel C 
Acrochaetium maluinum Hamel U 
Acrochaetium manorense P.Anand C 
Acrochaetium mauritianum Børgesen C 
Acrochaetium mediterraneum (Levring) Athanasiadis C 
Acrochaetium microfilum C.-C.Jao C 
Acrochaetium microfilum Levring S 
Acrochaetium microscopicum (Nägeli ex Kützing) Nägeli C 
Acrochaetium minimum Collins S 
Acrochaetium minutissimum Nägeli S 
Acrochaetium minutissimum (Zanardini) Papenfuss S 
Acrochaetium minutum (Suhr) Hamel C 
Acrochaetium mirabile (Suhr) Nägeli S 
Acrochaetium molinieri Coppejans & Boudouresque C 
Acrochaetium molle (Pilger) Hamel C 
Acrochaetium moniliforme (Rosenvinge) Børgesen C 
Acrochaetium multisporum Børgesen C 
Acrochaetium nemalii (De Notaris ex L.Dufour) Børgesen S 
Acrochaetium netrocarpum Børgesen C 
Acrochaetium nitidulum I.A.Abbott C 
Acrochaetium nitophyllii (Levring) Papenfuss C 
Acrochaetium nurulislamii A.Aziz & S.Islam C 
Acrochaetium occidentale Børgesen S 
Acrochaetium opetigenum Børgesen C 
Acrochaetium ophioglossum (Schneider) Ballantine & Aponte S 
Acrochaetium pacificum Kylin C 
Acrochaetium pallens (Zanardini) Nägeli C 
Acrochaetium papenfussii I.A.Abbott C 
Acrochaetium parvulum (Kylin) Hoyt C 
Acrochaetium pectinatum (Kylin) Hamel S 
Acrochaetium penetrans (Levring) Papenfuss S 
Acrochaetium phacelorhizum Børgesen C 
Acrochaetium phuquocensis Pham-Hoàng Hô C 
Acrochaetium plumosum (K.M.Drew) G.M.Smith C 
Acrochaetium polyblastum (Rosenvinge) Børgesen S 
Acrochaetium polyidis (Rosenvinge) Børgesen S 
Acrochaetium polysporum M.Howe C 
Acrochaetium porphyrae (K.M.Drew) G.M.Smith S 
Acrochaetium posidoniae (Zanardini) Nägeli S 
Acrochaetium pseudoerectum Pham-Hoàng Hô C 
Acrochaetium pubes (C.Agardh) Nägeli S 
Acrochaetium pubes (Agardh) Nägeli P 
Acrochaetium pulchellum Børgesen C 
Acrochaetium pulvereum Nägeli U 
Acrochaetium pulvinatum Levring C 
Acrochaetium punctatum E.Y.Dawson S 
Acrochaetium pusillum Feldmann U 
Acrochaetium pygmaeum (Kützing) Nägeli S 
Acrochaetium radians Hamel C 
Acrochaetium radiatum C.-C.Jao S 
Acrochaetium ralfsiae Børgesen C 
Acrochaetium reductum (Rosenvinge) Hamel C 
Acrochaetium reniforme Aziz C 
Acrochaetium repens Børgesen C 
Acrochaetium reticulatum (Batters) Papenfuss S 
Acrochaetium rhipidandrum (Rosenvinge) Hamel S 
Acrochaetium robustum Børgesen C 
Acrochaetium rongelapense I.A.Abbott C 
Acrochaetium roseolum (Crouan) Nägeli C 
Acrochaetium rosulatum (Rosenvinge) Papenfuss S 
Acrochaetium ryukyuense (Nakamura) Papenfuss C 
Acrochaetium sagraeanum (Montagne) Bornet C 
Acrochaetium sanctae-mariae (Darbishire) Hamel C 
Acrochaetium sancti-thomae Børgesen C 
Acrochaetium sargassi Børgesen S 
Acrochaetium sargassicaulinum Noda C 
Acrochaetium sargassicola Børgesen S 
Acrochaetium sarmae M.Khan S 
Acrochaetium savianum (Meneghini) Nägeli S 
Acrochaetium scapae (Lyle) Papenfuss C 
Acrochaetium scinaiae E.Y.Dawson S 
Acrochaetium secundatum (Lyngbye) Nägeli C - type
Acrochaetium seiriolanum (Harvey-Gibson) Hamel C 
Acrochaetium seriasporum (E.Y.Dawson) J.N.Norris C 
Acrochaetium seriatum Børgesen S 
Acrochaetium sertulariae Jaasund C 
Acrochaetium sessile (Nakamura) Y.-P.Lee C 
Acrochaetium sinicola (E.Y.Dawson) Papenfuss S 
Acrochaetium sparsum (Harvey) Nägeli C 
Acrochaetium spathoglossi Børgesen C 
Acrochaetium spermatochni J.Feldmann C 
Acrochaetium spiculiphilum E.Y.Dawson S 
Acrochaetium spongicola Weber-van Bosse C 
Acrochaetium stilophorae (Levring) Kylin C 
Acrochaetium streblocladiae P.J.L.Dangeard S 
Acrochaetium strictum (Rosenvinge) Hamel S 
Acrochaetium stypopodiae Aziz C 
Acrochaetium subpinnatum Bornet ex Hamel C 
Acrochaetium subreductum Levring S 
Acrochaetium subseriatum C.-C.Jao S 
Acrochaetium subseriatum Børgesen C 
Acrochaetium subsimplex Levring C 
Acrochaetium subtilissimum (Kützing) Hamel C 
Acrochaetium tenuissimum (Collins) Papenfuss C 
Acrochaetium terminale (Nakamura) Y.-P.Lee C 
Acrochaetium thuretii (Bornet) Collins & Hervey S 
Acrochaetium toyamaense Noda & Honda S 
Acrochaetium trichogloeae Børgesen C 
Acrochaetium trifilum (Buffham) Batters C 
Acrochaetium tuticorinense Børgesen C 
Acrochaetium unifilum C.-C.Jao C 
Acrochaetium unilaterale (Kjellman) Hamel S 
Acrochaetium unipes Børgesen C 
Acrochaetium vagum (K.M.Drew) C.-C.Jao S 
Acrochaetium vinculoides (Heydrich) Okamura C 
Acrochaetium virgatulum (Harvey) Batters S 
Acrochaetium yamadae (Garbary) Y.Lee & I.K.Lee S 
Acrochaetium zosterae Papenfuss S 

Harper, J.T. & Saunders, G.W. (2002). A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov.. British Phycological Journal 37: 463-475.

Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.

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: 28 December 2000 by M.D. Guiry

Verified by: 20 January 2017 by M.D. Guiry

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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 24 November 2017.

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