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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
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Solitary
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
Extinct
Extinct
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Displaying
754
of 1105 species
GC
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Acanthoceras
Acanthoceras zachariasii
Achnanthes
Achnanthes mauiensis
Achnanthes tumescens
Achnanthes undulorostrata
Achnanthes felinophila
Achnanthes longboardia
Achnanthes inflata
Achnanthes coarctata
Achnanthidium
Achnanthidium rosenstockii
Achnanthidium subhudsonis var. kraeuselii
Achnanthidium laticephalum
Achnanthidium crassum
Achnanthidium kranzii
Achnanthidium alpestre
Achnanthidium atomus
Achnanthidium gracillimum
Achnanthidium delmontii
Achnanthidium druartii
Actinocyclus
Actinocyclus normanii
Adlafia
Adlafia suchlandtii
Adlafia detenta
Amicula
Amicula vermiculata
Amphora
Amphora minutissima
Amphora calumetica
Amphora bicapitata
GC
Aneumastus
Aneumastus minor
Aneumastus pseudotusculus
Aneumastus carolinianus
Aneumastus rostratus
Aneumastus tusculus
Anomoeoneis
Anomoeoneis capitata
Anomoeoneis fogedii
Anomoeoneis monoensis
Anomoeoneis sphaerophora f. rostrata
Anomoeoneis sphaerophora
Anomoeoneis costata
Anomoeoneis sculpta
Biremis
Biremis undulata
Biremis circumtexta
Boreozonacola
Boreozonacola hustedtii
Boreozonacola olympica
Brachysira
Brachysira zellensis
Brachysira vitrea
Brachysira subtilis
Brachysira confusa
Brachysira styriaca
Brachysira ocalanensis
Brachysira arctoborealis
Brachysira follis
Brachysira neoacuta
Brachysira hannae
Brachysira serians
Brebissonia
Brebissonia lanceolata
Caloneis
Caloneis bacillum
Caloneis fusus
Caloneis lewisii
Caloneis silicula
Caloneis amphisbaena
Campylodiscus
Campylodiscus clypeus
Capartogramma
Capartogramma crucicula
Cavinula
Cavinula pseudoscutiformis
Cavinula jaernefeltii
Cavinula lapidosa
Cavinula pusio
Cavinula scutelloides
Cavinula cocconeiformis
Cavinula davisiae
Cavinula variostriata
Cavinula scutiformis
Cavinula maculata
Chamaepinnularia
Chamaepinnularia hassiaca
Chamaepinnularia mediocris
Chamaepinnularia krasskei
Chamaepinnularia witkowskii
Chamaepinnularia gandrupii
Chamaepinnularia krookii
Cocconeis
Cocconeis pseudothumensis
Cocconeis fluviatilis
Cocconeis cascadensis
Cocconeis pediculus
Cocconeis klamathensis
Cocconeis coreana
Cocconeis rugosa
Cocconeis placentula
Cocconeis grovei
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
Cyclotella
Cyclotella distinguenda
Cyclotella kingstonii
Cylindrotheca
Cylindrotheca gracilis
Cymbella
Cymbella excisiformis
Cymbella laevis
Cymbella affiniformis
Cymbella subleptoceros
Cymbella parva
Cymbella hustedtii
Cymbella neoleptoceros
Cymbella cleve-eulerae
Cymbella hantzschiana
Cymbella rumrichiae
Cymbella vulgata
Cymbella stigmaphora
Cymbella alpestris
Cymbella maggiana
Cymbella fontinalis
Cymbella neocistula var. islandica
Cymbella cymbiformis
Cymbella perfossilis
Cymbella aspera
Cymbella lanceolata
Cymbella designata
GC
Cymbellonitzschia
Cymbellonitzschia diluviana
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
Decussata
Decussata placenta
Delicatophycus
Delicatophycus tundraphilus
Delicatophycus canadensis
Delicatophycus montana
Delicatophycus delicatulus
Delicatophycus alpestris
Denticula
Denticula creticola
Denticula tenuis
Denticula subtilis
Denticula kuetzingii
Diatoma
Diatoma ehrenbergii
Diatomella
Diatomella balfouriana
Diploneis
Diploneis puella
Diploneis puellafallax
Diploneis submarginestriata
Diploneis potapovae
Diploneis calcicolafrequens
Diploneis texana
Diploneis parma
Diploneis calcilacustris
Diploneis boldtiana
Diploneis abscondita
Diploneis doncharlesii
Diploneis krammeri
Diploneis ovalis
Diploneis mollenhaueri
Diploneis elliptica
Diploneis finnica
Discostella
Discostella pseudostelligera
Discostella lacuskarluki
Discostella stelligera
Discostella asterocostata
Encyonema
Encyonema minutum
Encyonema triangulum
Encyonopsis
Encyonopsis lacusalpini
Encyonopsis minuta
Encyonopsis alpina
Encyonopsis subminuta
Encyonopsis microcephala
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 vanlandinghamii
Envekadea metzeltinii
Eolimna
Eolimna metafarta
Eolimna aboensis
Epithemia
Epithemia sorex
Epithemia reicheltii
Epithemia gibberula
Epithemia musculus
Epithemia adnata
Epithemia alpestris
Epithemia argus
Epithemia smithii
Epithemia turgida
Epithemia gibba
Eucocconeis
Eucocconeis alpestris
Eucocconeis flexella
Eunotia
Eunotia orthohedra
Eunotia perpusilla
Eunotia tecta
Eunotia bidentula
Eunotia gibbosa
Eunotia incisa
Eunotia mucophila
Eunotia novaeangliae
Eunotia bidens
Eunotia sarraceniae
Eunotia charliereimeri
Eunotia pectinalis
Eunotia panda
Eunotia lewisii
Eunotia bilunaris
Eunotia superbidens
Eunotia pseudoparallela
Eunotia formica
Eunotia metamonodon
Eunotia spatulata
Eunotia tauntoniensis
Eupodiscus
Eupodiscus radiatus
Fallacia
Fallacia californica
Fallacia tenera
Fallacia subhamulata
Fallacia vitrea
Fallacia hummii
Fallacia pygmaea
Fragilaria
Fragilaria cyclopum
Fragilaria amphicephaloides
Frustulia
Frustulia pseudomagaliesmontana
Frustulia amosseana
Frustulia esandalliae
Frustulia bahlsii
Geissleria
Geissleria ignota
Geissleria declivis
Geissleria cascadensis
Geissleria kriegeri
Geissleria lateropunctata
Geissleria punctifera
Genkalia
Genkalia digitulus
Gliwiczia
Gliwiczia calcar
Gogorevia
Gogorevia exilis
Gogorevia rostellata
Gomphonema
Gomphonema distans
Gomphonema nathorstii
Gomphonema eileencoxiae
Gomphonema semiapertum
Gomphosinica
Gomphosinica geitleri
Grunowia
Grunowia solgensis
Grunowia tabellaria
Grunowia sinuata
Gyrosigma
Gyrosigma obscurum
Gyrosigma acuminatum
Gyrosigma obtusatum
Gyrosigma attenuatum
Halamphora
Halamphora thumensis
Halamphora subtilis
Halamphora montana
Halamphora normanii
Halamphora oligotraphenta
Halamphora coffeiformis
Halamphora veneta
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 pantropica
Hygropetra
Hygropetra balfouriana
Iconella
Iconella hibernica
Iconella tenera
Iconella bifrons
Iconella guatimalensis
Karayevia
Karayevia amoena
Karayevia laterostrata
Karayevia ploenensis var. gessneri
Karayevia clevei
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
Lemnicola
Lemnicola hungarica
Lindavia
Lindavia ocellata
Lindavia praetermissa
Lindavia radiosa
Lindavia antiqua
Lindavia affinis
Lindavia intermedia
Lindavia bodanica
Lindavia eriensis
Luticola
Luticola ventricosa
Luticola ignorata
Luticola arctica
Luticola goeppertiana
Luticola stigma
Luticola hamiltonii
Luticola minor
Luticola mobiliensis
Mastogloia
Mastogloia binotata
Mastogloia taralunae
Mastogloia grevillei
Mastogloia lucayensis
Mastogloia albertii
Mastogloia pumila
Mastogloia calcarea
Mastogloia lacustris
Mastogloia elliptica
Mastogloia floridensis
Mayamaea
Mayamaea cahabaensis
Muelleria
Muelleria gibbula
Muelleria tetonensis
Muelleria agnellus
Muelleria spauldingiae
Navicula
Navicula ingenua
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 salinarum
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 perotii
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 hodgeana
GC
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 bobmarshallensis
Neidium bisulcatum
Neidium hitchcockii
Neidium sacoense
Neidium undulatum
Neidium fossum
Neidium amphigomphus
Neidium dilatatum
Neidium iridis
Nitzschia
Nitzschia inconspicua
Nitzschia innominata
Nitzschia microcephala
Nitzschia fonticoloides
Nitzschia soratensis
Nitzschia alpina
Nitzschia desertorum
Nitzschia semirobusta
Nitzschia acidoclinata
Nitzschia amphibia
Nitzschia communis
Nitzschia oregona
Nitzschia oligotraphenta
Nitzschia incognita
Nitzschia sociabilis
Nitzschia fonticola
Nitzschia exilis
Nitzschia biacrula
Nitzschia columbiana
Nitzschia dissipata
Nitzschia recta
Nitzschia angustata
Nitzschia regula var. robusta
Nitzschia serpentiraphe
Nitzschia linearis
Nitzschia sigmoidea
Nupela
Nupela carolina
Nupela neglecta
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 mesodon
Oxyneis
Oxyneis binalis var. elliptica
Pinnularia
Pinnularia marchica
Pinnularia pluvianiformis
Pinnularia bigibba
Pinnularia subanglica
Pinnularia saprophila
Pinnularia divergentissima
Pinnularia borealis
Pinnularia gibbiformis
Pinnularia subcapitata var. elongata
Pinnularia borealis var. lanceolata
Pinnularia brebissonii
Pinnularia nodosa
Pinnularia nodosa var. percapitata
Pinnularia rabenhorstii
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 lata
Pinnularia cuneicephala
Pinnularia kwacksii
Pinnularia undula var. major
Pinnularia clericii
Pinnularia formica
Pinnularia subgibba
Pinnularia streptoraphe
Pinnularia rexlowei
Pinnularia bihastata
Pinnularia spinifera
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 potapovae
Planothidium abbreviatum
Planothidium delicatulum
Planothidium reichardtii
Planothidium incuriatum
Planothidium amphibium
Planothidium biporomum
Planothidium sheathii
Planothidium apiculatum
Planothidium lanceolatoides
Planothidium joursacense
GC
Platessa
Platessa bahlsii
Platessa kingstonii
Platessa hustedtii
Platessa stewartii
Platessa lutheri
Platessa conspicua
Platessa oblongella
Platessa strelnikovae
Playaensis
Playaensis circumfimbria
Pleurosigma
Pleurosigma inflatum
Pleurosigma delicatulum
Prestauroneis
Prestauroneis protracta
Prestauroneis integra
Psammothidium
Psammothidium microscopicum
Psammothidium didymum
Psammothidium semiapertum
Psammothidium levanderi
Psammothidium subatomoides
Psammothidium scoticum
Psammothidium pennsylvanicum
Psammothidium lauenburgianum
Psammothidium nivale
Psammothidium acidoclinatum
Psammothidium chlidanos
Psammothidium daonense
Psammothidium bioretii
Psammothidium helveticum
Psammothidium lacustre
Psammothidium harveyi
Psammothidium alpinum
Psammothidium obliquum
Pseudofallacia
Pseudofallacia monoculata
Pseudostaurosira
Pseudostaurosira elliptica
Pseudostaurosira parasitica
Reimeria
Reimeria uniseriata
Rexlowea
Rexlowea navicularis
Rossithidium
Rossithidium nodosum
Rossithidium petersenii
Rossithidium anastasiae
Scoliopleura
Scoliopleura peisonis
Sellaphora
Sellaphora saugerresii
Sellaphora pulchra
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 bacillum
Sellaphora fusticulus
Sellaphora hohnii
Sellaphora laevissima
Sellaphora alastos
Sellaphora americana
Sellaphora moesta
Seminavis
Seminavis eulensteinii
Semiorbis
Semiorbis rotundus
Skabitschewskia
Skabitschewskia oestrupii
Skabitschewskia peragalloi
Stauroneis
Stauroneis separanda
Stauroneis thermicola
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 alabamae
Stauroneis sonyae
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
Staurosirella
Staurosirella martyi
Staurosirella leptostauron
Staurosirella leptostauron var. dubia
Stephanocyclus
Stephanocyclus gamma
Stephanodiscus
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
Synedra
Synedra famelica
Tetracyclus
Tetracyclus rupestris
Tetracyclus emarginatus
Tetracyclus glans
Thalassiosira
Thalassiosira lacustris
Tryblionella
Tryblionella lanceola
Tryblionella apiculata
Tryblionella brunoi
Tryblionella gracilis
Tryblionella plana var. fennica
Tryblionella scalaris