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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
Genera
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Size Range,
µm
3
11-100
101-1000
1001-10000
10001-100000
100001-1000000
Length/Diameter,
µm
Width,
µm
Stria density
per 10 μm, near center
Motility
Non-motile
Weakly motile
Slightly motile
Moderately motile
Highly motile
Attachment
Unattached
Prostrate
Tube-Forming
Vertical
Habitat
Soils
Moist habitats
Benthic
Planktonic
Milieu
Rivers
Lakes
Wetlands
Springs
Splash zones
Estuaries
Neritic
Sea Ice
Colony
Solitary
Colonies occasional
Colonies common
Biological Condition Gradient
BCG 1
BCG 2
BCG 3
BCG 4
BCG 5
Distribution
Western rivers 2004
Southeast rivers 2014
Northeast rivers 2016
Northwest rivers 2015
California coastal rivers 2017
Northeast lake sediments
Nat. Eco. Obs. Network (NEON)
Great Lakes inventory
Nitrogen Fixer
Nitrogen Fixer
Rare
Rare
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Extinct
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Displaying
702
of 1106 species
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Acanthoceras
Acanthoceras zachariasii
Achnanthes
Achnanthes mauiensis
Achnanthes tumescens
Achnanthes undulorostrata
Achnanthes felinophila
Achnanthes longboardia
Achnanthes inflata
Achnanthidium
Achnanthidium rosenstockii
Achnanthidium subhudsonis var. kraeuselii
Achnanthidium druartii
Actinella
Actinella punctata
Actinocyclus
Actinocyclus normanii
Adlafia
Adlafia suchlandtii
Adlafia detenta
Amphora
Amphora calumetica
Amphora bicapitata
GC
Aneumastus
Aneumastus minor
Aneumastus carolinianus
Aneumastus rostratus
Aneumastus tusculus
Anomoeoneis
Anomoeoneis capitata
Anomoeoneis fogedii
Anomoeoneis monoensis
Anomoeoneis sphaerophora f. rostrata
Anomoeoneis sphaerophora
Anomoeoneis costata
Anomoeoneis sculpta
Asterionella
Asterionella formosa
Asterionella ralfsii var. americana
Aulacoseira
Aulacoseira granulata var. angustissima
Aulacoseira herzogii
Aulacoseira pusilla
Aulacoseira tenella
Aulacoseira humilis
Aulacoseira nivaloides
Aulacoseira nygaardii
Aulacoseira ambigua
Aulacoseira crassipunctata
Aulacoseira subarctica
Aulacoseira alpigena
Aulacoseira canadensis
Aulacoseira valida
Aulacoseira newjerseyana
Aulacoseira granulata
Aulacoseira nivalis
Aulacoseira islandica
Aulacoseira lirata
Aulacoseira italica
Aulacoseira muzzanensis
Biremis
Biremis undulata
Biremis circumtexta
Boreozonacola
Boreozonacola hustedtii
Boreozonacola olympica
Brachysira
Brachysira zellensis
Brachysira vitrea
Brachysira subtilis
Brachysira confusa
Brachysira brebissonii
Brachysira styriaca
Brachysira ocalanensis
Brachysira arctoborealis
Brachysira follis
Brachysira neoacuta
Brachysira hannae
Brachysira serians
Caloneis
Caloneis fusus
Caloneis lewisii
Caloneis amphisbaena
Campylodiscus
Campylodiscus clypeus
Capartogramma
Capartogramma crucicula
Cavinula
Cavinula jaernefeltii
Cavinula lapidosa
Cavinula pusio
Cavinula scutelloides
Cavinula davisiae
Cavinula variostriata
Cavinula scutiformis
Cavinula maculata
Chaetoceros
Chaetoceros lauderi
Chamaepinnularia
Chamaepinnularia hassiaca
Chamaepinnularia krasskei
Chamaepinnularia witkowskii
Chamaepinnularia gandrupii
Chamaepinnularia krookii
Cosmioneis
Cosmioneis citriformis
Cosmioneis hawaiiensis
Cosmioneis reimeri
Craticula
Craticula subminuscula
Craticula molestiformis
Craticula citrus
Craticula accomoda
Craticula accomodiformis
Craticula riparia
Craticula buderi
Craticula halophila
Craticula ambigua
Craticula johnstoniae
Craticula sardiniana
Craticula cuspidata
Craticula coloradensis
Craticula acidoclinata
Craticula pampeana
Cyclostephanos
Cyclostephanos invisitatus
Cyclostephanos tholiformis
Cyclostephanos dubius
Cyclotella
Cyclotella distinguenda
Cyclotella quillensis
Cylindrotheca
Cylindrotheca gracilis
Cymbella
Cymbella cleve-eulerae
Cymbella fontinalis
Cymbella designata
GC
Cymbopleura
Cymbopleura amphicephala
Cymbopleura naviculiformis
Cymbopleura angustata
Cymbopleura fluminea
Cymbopleura frequens
Cymbopleura oblongata
Cymbopleura incertiformis var. laterostrata
Cymbopleura maggieae
Cymbopleura subaequalis
Cymbopleura lapponica
Cymbopleura rupicola
Cymbopleura hybrida
Cymbopleura elliptica
Cymbopleura sublanceolata
Cymbopleura anglica
Cymbopleura laszlorum
Cymbopleura incertiformis var. linearis
Cymbopleura incerta
Cymbopleura incertiformis
Cymbopleura metzeltinii
Cymbopleura florentina
Cymbopleura stauroneiformis
Cymbopleura rainierensis
Cymbopleura tynnii
Cymbopleura apiculata
Cymbopleura edlundii
Cymbopleura lata
Cymbopleura austriaca
Cymbopleura subcuspidata
Cymbopleura perprocera
Cymbopleura crassipunctata
Cymbopleura inaequalis
Cymbopleura heinii
Cymbopleura subrostrata
Delicatophycus
Delicatophycus tundraphilus
Delicatophycus canadensis
Delicatophycus montana
Delicatophycus delicatulus
Delicatophycus alpestris
Denticula
Denticula creticola
Denticula subtilis
Denticula kuetzingii
Diatoma
Diatoma tenuis
Diatoma ehrenbergii
Diploneis
Diploneis puella
Diploneis puellafallax
Diploneis submarginestriata
Diploneis potapovae
Diploneis calcicolafrequens
Diploneis texana
Diploneis parma
Diploneis calcilacustris
Diploneis galloprovincialis
Diploneis boldtiana
Diploneis abscondita
Diploneis doncharlesii
Diploneis krammeri
Diploneis ovalis
Diploneis mollenhaueri
Diploneis elliptica
Diploneis finnica
Diprora
Diprora haenaensis
Discostella
Discostella lacuskarluki
Discostella asterocostata
Ellerbeckia
Ellerbeckia arenaria
Encyonema
Encyonema minutum
Encyonema triangulum
Encyonopsis
Encyonopsis lacusalpini
Encyonopsis minuta
Encyonopsis alpina
Encyonopsis thumensis
Encyonopsis perborealis
Encyonopsis bobmarshallensis
Encyonopsis hustedtii
Encyonopsis robusta
Encyonopsis krammeri
Encyonopsis kutenaiorum
Encyonopsis medicinalis
Encyonopsis albertana
Encyonopsis anacondae
Encyonopsis neerlandica
Encyonopsis descripta
Encyonopsis czarneckii
Encyonopsis dakotae
Encyonopsis descriptiformis
Encyonopsis falaisensis
Encyonopsis cesatii
Encyonopsis cesatiformis
Encyonopsis stafsholtii
Encyonopsis lacuscaerulei
Encyonopsis montana
Encyonopsis aequaliformis
GC
Entomoneis
Entomoneis punctulata
Entomoneis paludosa
Entomoneis ornata
Entomoneis alata
Envekadea
Envekadea pachycephala
Envekadea vanlandinghamii
Envekadea metzeltinii
Eolimna
Eolimna metafarta
Eolimna aboensis
Epithemia
Epithemia reicheltii
Epithemia alpestris
Epithemia argus
Eunotia
Eunotia microcephala
Eunotia orthohedra
Eunotia perpusilla
Eunotia bidentula
Eunotia gibbosa
Eunotia bactriana
Eunotia sudetica
Eunotia mucophila
Eunotia novaeangliae
Eunotia bidens
Eunotia zasuminensis
Eunotia triodon
Eunotia panda
Eunotia superbidens
Eunotia formica
Eunotia spatulata
Eupodiscus
Eupodiscus radiatus
Fallacia
Fallacia californica
Fallacia subhamulata
Fallacia vitrea
Fallacia hummii
Fragilaria
Fragilaria amphicephaloides
Fragilaria crotonensis
Fragilariforma
Fragilariforma horstii
Fragilariforma nitzschioides
Fragilariforma virescens
Frustulia
Frustulia pseudomagaliesmontana
Frustulia crassinervia
Frustulia amosseana
Frustulia esandalliae
Frustulia krammeri
Frustulia bahlsii
Geissleria
Geissleria acceptata
Geissleria ignota
Geissleria declivis
Geissleria cascadensis
Geissleria kriegeri
Geissleria lateropunctata
Geissleria punctifera
Geissleria decussis
Gliwiczia
Gliwiczia calcar
Gogorevia
Gogorevia exilis
Gogorevia rostellata
Grunowia
Grunowia solgensis
Grunowia tabellaria
Grunowia sinuata
Gyrosigma
Gyrosigma obscurum
Gyrosigma acuminatum
Gyrosigma obtusatum
Gyrosigma attenuatum
Halamphora
Halamphora latecostata
Halamphora elongata
Hannaea
Hannaea arcus
Hantzschia
Hantzschia amphioxys
Hippodonta
Hippodonta pseudacceptata
Hippodonta coxiae
Hippodonta gravistriata
Hippodonta capitata subsp. iberoamericana
Hippodonta hungarica
Hippodonta capitata
Humidophila
Humidophila schmassmannii
Humidophila undulata
Humidophila contenta
Humidophila perpusilla
Humidophila pantropica
Iconella
Iconella hibernica
Iconella tenera
Iconella bifrons
Iconella guatimalensis
Karayevia
Karayevia amoena
Karayevia laterostrata
Karayevia ploenensis var. gessneri
Kobayasiella
Kobayasiella micropunctata
Kobayasiella subtilissima
Kobayasiella jaagii
Kobayasiella madumensis
Kobayasiella okadae
Kobayasiella parasubtilissima
Krasskella
Krasskella kriegeriana
Kurtkrammeria
Kurtkrammeria aequalis
Kurtkrammeria neoamphioxys
Kurtkrammeria stodderi
Kurtkrammeria weilandii
Kurtkrammeria subspicula
Kurtkrammeria lacusglacialis
Kurtkrammeria treinishii
Lacustriella
Lacustriella lacustris
Lindavia
Lindavia delicatula
Lindavia comensis
Lindavia michiganiana
Lindavia ocellata
Lindavia praetermissa
Lindavia rossii
Lindavia radiosa
Lindavia antiqua
Lindavia affinis
Lindavia intermedia
Lindavia bodanica
Luticola
Luticola ventricosa
Luticola ignorata
Luticola arctica
Luticola goeppertiana
Luticola stigma
Luticola minor
Luticola mobiliensis
Mastogloia
Mastogloia taralunae
Mastogloia pumila
Mastogloia lacustris
Mastogloia elliptica
Mayamaea
Mayamaea cahabaensis
Melosira
Melosira varians
Meridion
Meridion lineare
Microcostatus
Microcostatus krasskei
Muelleria
Muelleria gibbula
Muelleria tetonensis
Muelleria agnellus
Muelleria spauldingiae
Nanofrustulum
Nanofrustulum cataractarum
Navicula
Navicula ingenua
Navicula goersii
Navicula vilaplanii
Navicula kotschyi
Navicula caterva
Navicula longicephala
Navicula metareichardtiana
Navicula antonii
Navicula canalis
Navicula veneta
Navicula trilatera
Navicula eileeniae
Navicula cincta
Navicula seibigiana
Navicula subrostellata
Navicula supleeorum
Navicula cryptofallax
Navicula staffordiae
Navicula cryptocephala
Navicula symmetrica
Navicula gregaria
Navicula libonensis
Navicula aitchelbee
Navicula erifuga
Navicula capitatoradiata
Navicula lundii
Navicula germainii
Navicula leptostriata
Navicula notha
Navicula caroliniae
Navicula oppugnata
Navicula rostellata
Navicula recens
Navicula subrhynchocephala
Navicula trivialis
Navicula reinhardtii
Navicula escambia
Navicula schweigeri
Navicula wildii
Navicula geronimensis
Navicula cari
Navicula duerrenbergiana
Navicula winona
Navicula rhynchocephala
Navicula cryptocephaloides
Navicula rhynchotella
Navicula subconcentrica
Navicula weberi
Navicula pseudolanceolata
Navicula lanceolata
Navicula streckerae
Navicula tripunctata
Navicula vaneei
Navicula whitefishensis
Navicula harmoniae
Navicula margalithii
Navicula viridulacalcis subsp. neomundana
Navicula slesvicensis
Navicula angusta
Navicula venerablis
Navicula viridula
Navicula peregrinopsis
Navicula flatheadensis
Navicula piercei
Navicula hasta
Navicula sovereignii
Navicula radiosa
Navicula vulpina
Navicula galloae
Navicula peregrina
Navicula aurora
Navicula walkeri
Navicula ludloviana
Navicula subwalkeri
Navicula oblonga
Navicula volcanica
Navicula genovefae
GC
Navicymbula
Navicymbula pusilla
Neidiomorpha
Neidiomorpha binodiformis
Neidiopsis
Neidiopsis hamiltonii
Neidiopsis levanderi
Neidiopsis wulffii
Neidiopsis weilandii
Neidium
Neidium densestriatum
Neidium pseudodensestriatum
Neidium hercynicum
Neidium fogedii
Neidium distinctepunctatum
Neidium bobmarshallense
Neidium hitchcockii
Neidium sacoense
Neidium undulatum
Neidium fossum
Neidium amphigomphus
Neidium dilatatum
Neidium iridis
Ninastrelnikovia
Ninastrelnikovia gibbosa
Nitzschia
Nitzschia inconspicua
Nitzschia innominata
Nitzschia fonticoloides
Nitzschia soratensis
Nitzschia alpina
Nitzschia liebethruthii
Nitzschia semirobusta
Nitzschia acidoclinata
Nitzschia oligotraphenta
Nitzschia incognita
Nitzschia sociabilis
Nitzschia paleacea
Nitzschia balcanica
Nitzschia biacrula
Nitzschia clausii
Nitzschia columbiana
Nitzschia dissipata
Nitzschia reversa
Nitzschia recta
Nitzschia angustata
Nitzschia kurzeana
Nitzschia acicularis
Nitzschia regula var. robusta
Nitzschia serpentiraphe
Nitzschia filiformis
Nitzschia sigma
Nitzschia sigmoidea
Nitzschia siliqua
GC
Nupela
Nupela carolina
Nupela neglecta
Nupela scissura
Nupela vitiosa
Nupela wellneri
Nupela tenuicephala
Nupela impexiformis
Nupela fennica
Nupela decipiens
Nupela potapovae
Nupela elegantula
Nupela pennsylvanica
Nupela lapidosa
Nupela poconoensis
Nupela frezelii
Nupela subrostrata
Odontidium
Odontidium hyemale
Orthoseira
Orthoseira oregoniana
Orthoseira roeseana
Oxyneis
Oxyneis binalis
Pinnularia
Pinnularia marchica
Pinnularia pluvianiformis
Pinnularia bigibba
Pinnularia saprophila
Pinnularia divergentissima
Pinnularia borealis
Pinnularia subcapitata var. elongata
Pinnularia borealis var. lanceolata
Pinnularia brebissonii
Pinnularia nodosa
Pinnularia nodosa var. percapitata
Pinnularia rabenhorstii
Pinnularia scotica
Pinnularia wisconsinensis
Pinnularia subgibba var. lanceolata
Pinnularia brauniana
Pinnularia rhombarea
Pinnularia suchlandtii
Pinnularia feremorosa
Pinnularia lailaensis
Pinnularia subgibba var. sublinearis
Pinnularia polyonca var. stidolphii
Pinnularia microstauron
Pinnularia acrosphaeria
Pinnularia subgibba var. undulata
Pinnularia undula
Pinnularia parvulissima
Pinnularia turgidula
Pinnularia decrescens
Pinnularia turfosiphila
Pinnularia lokana
Pinnularia macilenta
Pinnularia socialis
Pinnularia lata
Pinnularia cuneicephala
Pinnularia kwacksii
Pinnularia undula var. major
Pinnularia clericii
Pinnularia formica
Pinnularia subgibba
Pinnularia streptoraphe
Pinnularia rexlowei
Pinnularia bihastata
Pinnularia spinifera
Pinnularia transversa
Pinnularia pulchella var. canadensis
Pinnularia torta
Pinnularia pulchella
Pinnularia nobilis var. regularis
Pinnularia dariana
Pinnularia gigas
Pinnularia ectorii
Pinnularia alabamae
Pinnunavis
Pinnunavis elegans
Placoneis
Placoneis anglophila
Placoneis explanata
Placoneis abiskoensis
Placoneis gastrum
Placoneis amphibola
Plagiotropis
Plagiotropis lepidoptera var. proboscidea
Plagiotropis arizonica
Planothidium
Planothidium rostratoholarcticum
Planothidium abbreviatum
Planothidium delicatulum
Planothidium reichardtii
Planothidium joursacense
GC
Platessa
Platessa bahlsii
Platessa kingstonii
Platessa hustedtii
Platessa lutheri
Platessa conspicua
Platessa strelnikovae
Playaensis
Playaensis circumfimbria
Pleurosigma
Pleurosigma inflatum
Prestauroneis
Prestauroneis protracta
Prestauroneis integra
Psammothidium
Psammothidium semiapertum
Psammothidium sacculus
Psammothidium lauenburgianum
Psammothidium harveyi
Psammothidium obliquum
Pseudofallacia
Pseudofallacia monoculata
Pseudostaurosira
Pseudostaurosira pseudoconstruens
Pulchellophycus
Pulchellophycus schwabei
Punctastriata
Punctastriata mimetica
Reimeria
Reimeria uniseriata
Rossithidium
Rossithidium kriegeri
Rossithidium anastasiae
Scoliopleura
Scoliopleura peisonis
Sellaphora
Sellaphora pulchra
Sellaphora schadei
Sellaphora atomoides
Sellaphora subfasciata
Sellaphora javanica
Sellaphora stroemii
Sellaphora subbacillum
Sellaphora japonica
Sellaphora wallacei
Sellaphora disjuncta
Sellaphora stauroneioides
Sellaphora meridionalis
Sellaphora auldreekie
Sellaphora rexii
Sellaphora bacilloides
Sellaphora californica
Sellaphora fusticulus
Sellaphora hohnii
Sellaphora laevissima
Sellaphora alastos
Sellaphora americana
Sellaphora moesta
Semiorbis
Semiorbis hemicyclus
Semiorbis eliasiae
Skabitschewskia
Skabitschewskia oestrupii
Stauroneis
Stauroneis separanda
Stauroneis kriegeri
Stauroneis bovbjergii
Stauroneis agrestis
Stauroneis smithii
Stauroneis smithii var. incisa
Stauroneis livingstonii
Stauroneis pseudagrestis
Stauroneis neohyalina
Stauroneis lauenburgiana
Stauroneis boyntoniae
Stauroneis kootenai
Stauroneis reichardtii
Stauroneis bryocola
Stauroneis acidoclinatopsis
Stauroneis pikuni
Stauroneis schroederi
Stauroneis siberica
Stauroneis acidoclinata
Stauroneis ancepsfallax
Stauroneis vandevijveri
Stauroneis absaroka
Stauroneis anceps
Stauroneis sacajaweae
Stauroneis amphicephala
Stauroneis pax
Stauroneis stodderi
Stauroneis fluminopsis
Stauroneis conspicua
Stauroneis thompsonii
Stauroneis angustilancea
Stauroneis staurolineata
Stauroneis gracilis
Stauroneis beeskovea
Stauroneis baconiana
Stauroneis akamina
Stauroneis subborealis
Stauroneis circumborealis
Stauroneis superkuelbsii
Stauroneis acuta
Stauroneis sonyae
Stauroneis kishinena
Stauroneis submarginalis
Stauroneis kingstonii
Stauroneis heinii
Stauroneis phoenicenteron
Stauroneis supergracilis
Stauroneis americana
Stauroneis finlandia
Stauroneis rex
Stauroneis terryi
Staurophora
Staurophora tackei
Staurophora soodensis
Staurophora wislouchii
Staurophora brantii
Staurophora columbiana
Staurophora amphioxys
Staurosira
Staurosira stevensonii
Staurosirella
Staurosirella berolinensis
Staurosirella neopinnata
Stephanocyclus
Stephanocyclus meneghinianus
Stephanocyclus gamma
Stephanodiscus
Stephanodiscus parvus
Stephanodiscus minutulus
Stephanodiscus binderanus
Stephanodiscus hantzschii f. tenuis
Stephanodiscus hantzschii
Stephanodiscus oregonicus
Stephanodiscus alpinus
Stephanodiscus medius
Stephanodiscus yellowstonensis
Stephanodiscus niagarae
Stephanodiscus reimeri
Surirella
Surirella stalagma
Surirella atomus
Surirella lacrimula
Surirella suecica
Surirella amphioxys
Surirella iowensis
Surirella arctica
Surirella brebissonii
Surirella angusta
Surirella pinnata
Surirella ovalis
Surirella crumena
Surirella striatula
Surirella undulata
Surirella cruciata
Surirella terryi
Surirella librile
Surirella internationalis
GC
Tabellaria
Tabellaria fenestrata
Tabellaria flocculosa
Terpsinoë
Terpsinoe musica
Tetracyclus
Tetracyclus rupestris
Tetracyclus hinziae
Tetracyclus emarginatus
Thalassiosira
Thalassiosira minima
Thalassiosira weissflogii
Thalassiosira lacustris
Tryblionella
Tryblionella lanceola
Tryblionella granulata
Tryblionella apiculata
Tryblionella brunoi
Tryblionella gracilis
Tryblionella plana var. fennica
Tryblionella scalaris
Ulnaria
Ulnaria contracta
Ulnaria delicatissima
Urosolenia
Urosolenia eriensis