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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
Genera
Species
Glossary
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What are diatoms?
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101-1000
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
438
of 1106 species
GC
Genus Considered
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Achnanthes
Achnanthes mauiensis
Achnanthidium
Achnanthidium reimeri
Achnanthidium alpestre
Achnanthidium rivulare
Achnanthidium druartii
Achnanthidium deflexum
Achnanthidium duthiei
Amicula
Amicula vermiculata
Amphipleura
Amphipleura pellucida
Amphora
Amphora pediculus
Amphora minutissima
Amphora bicapitata
GC
Aneumastus
Aneumastus minor
Aneumastus carolinianus
Anomoeoneis
Anomoeoneis capitata
Anomoeoneis monoensis
Anomoeoneis sphaerophora f. rostrata
Asterionella
Asterionella formosa
Aulacoseira
Aulacoseira granulata var. angustissima
Aulacoseira herzogii
Aulacoseira pusilla
Aulacoseira ambigua
Aulacoseira crassipunctata
Aulacoseira subarctica
Aulacoseira canadensis
Aulacoseira valida
Aulacoseira granulata
Aulacoseira nivalis
Aulacoseira islandica
Aulacoseira lirata
Aulacoseira italica
Aulacoseira muzzanensis
Bacillaria
Bacillaria paxillifera
Biremis
Biremis circumtexta
Boreozonacola
Boreozonacola hustedtii
Boreozonacola olympica
Brachysira
Brachysira vitrea
Brachysira microcephala
Brachysira subtilis
Brachysira confusa
Brachysira brebissonii
Brachysira styriaca
Brachysira ocalanensis
Caloneis
Caloneis bacillum
Caloneis fusus
Caloneis lewisii
Caloneis silicula
Capartogramma
Capartogramma crucicula
Cavinula
Cavinula pseudoscutiformis
Cavinula vincentii
Cavinula lapidosa
Cavinula pusio
Cavinula scutelloides
Cavinula davisiae
Cavinula variostriata
Cavinula scutiformis
Chamaepinnularia
Chamaepinnularia witkowskii
Chamaepinnularia krookii
Cocconeis
Cocconeis fluviatilis
Cocconeis cascadensis
Cocconeis pediculus
Cocconeis czarneckii
Cocconeis coreana
Cocconeis rugosa
Cocconeis placentula
Craticula
Craticula buderi
Cyclostephanos
Cyclostephanos invisitatus
Cyclostephanos tholiformis
Cyclostephanos dubius
Cyclotella
Cyclotella kingstonii
Cylindrotheca
Cylindrotheca gracilis
Cymbella
Cymbella cosleyi
Cymbella excisiformis
Cymbella affiniformis
Cymbella affinis
Cymbella subleptoceros
Cymbella parva
Cymbella hustedtii
Cymbella neoleptoceros
Cymbella blinnii
Cymbella stigmaphora
Cymbella designata
GC
Cymbellonitzschia
Cymbellonitzschia diluviana
Cymbopleura
Cymbopleura amphicephala
Cymbopleura naviculiformis
Cymbopleura frequens
Cymbopleura oblongata
Cymbopleura incertiformis var. laterostrata
Cymbopleura maggieae
Cymbopleura subaequalis
Cymbopleura rupicola
Cymbopleura incertiformis var. linearis
Cymbopleura incertiformis
Cymbopleura metzeltinii
Cymbopleura florentina
Decussata
Decussata placenta
Delicatophycus
Delicatophycus tundraphilus
Delicatophycus canadensis
Delicatophycus delicatulus
Denticula
Denticula tenuis
Denticula kuetzingii
Diadesmis
Diadesmis confervacea
Diatoma
Diatoma moniliformis
Diatoma vulgaris
Diatoma tenuis
Diploneis
Diploneis submarginestriata
Diploneis texana
Discostella
Discostella stelligera
Distrionella
Distrionella incognita
Encyonema
Encyonema montanum
Encyonema obscurum
Encyonema hamsherae
Encyonema lange-bertalotii
Encyonema appalachianum
Encyonema neogracile
Encyonema norvegicum
Encyonema hebridicum
Encyonopsis
Encyonopsis krammeri
Encyonopsis medicinalis
Encyonopsis albertana
Encyonopsis neerlandica
Encyonopsis czarneckii
Encyonopsis dakotae
Encyonopsis falaisensis
Encyonopsis cesatii
Encyonopsis cesatiformis
Encyonopsis stafsholtii
Encyonopsis montana
Encyonopsis aequaliformis
GC
Envekadea
Envekadea pachycephala
Envekadea vanlandinghamii
Eolimna
Eolimna metafarta
Eolimna aboensis
Epithemia
Epithemia gibberula
Eucocconeis
Eucocconeis laevis
Eucocconeis depressa
Eucocconeis alpestris
Eunotia
Eunotia orthohedra
Eunotia cataractarum
Eunotia exigua
Eunotia trinacria
Eunotia rhomboidea
Eunotia tecta
Eunotia horstii
Eunotia subherkiniensis
Eunotia bidentula
Eunotia canicula
Eunotia papilioforma
Eunotia gibbosa
Eunotia bactriana
Eunotia sudetica
Eunotia boomsma
Eunotia nymanniana
Eunotia paludosa
Eunotia hexaglyphis
Eunotia incisa
Eunotia mucophila
Eunotia kociolekii
Eunotia novaeangliae
Eunotia richbuttensis
Eunotia mydohaimasiae
Eunotia panda
Eunotia naegelii
Fallacia
Fallacia californica
Fallacia tenera
Fallacia vitrea
Fallacia latelongitudinalis
Fallacia pygmaea
Fragilaria
Fragilaria recapitellata
Fragilaria vaucheriae
Fragilaria socia
Fragilaria mesolepta
Fragilaria cyclopum
Fragilaria amphicephaloides
Fragilaria crotonensis
Fragilaria tenera
Fragilaria synegrotesca
Fragilariforma
Fragilariforma marylandica
Fragilariforma virescens
Frustulia
Frustulia creuzburgensis
Frustulia neomundana
Geissleria
Geissleria ignota
Geissleria declivis
Geissleria cascadensis
Geissleria kriegeri
Geissleria lateropunctata
Geissleria punctifera
Geissleria decussis
Gliwiczia
Gliwiczia calcar
Gogorevia
Gogorevia exilis
Gogorevia rostellata
Gomphonella
Gomphonella hutchinsoniana
Gomphonella pseudookunoi
Gomphonella fogedii
Gomphonella olivacea
Gomphonema
Gomphonema montezumense
Gomphonema variostriatum
Gomphonema superiorense
Gomphonema lagenula
Gomphonema kobayasii
Gomphonema sierranum
Gomphonema caperatum
Gomphonema duplipunctatum
Gomphonema apuncto
Gomphonema germainii
Gomphonema stoermeri
Gomphonema johnsonii
Gomphonema pseudosphaerophorum
Gomphonema apicatum
Gomphonema pusillum
Gomphosinica
Gomphosinica geitleri
Gomphosphenia
Gomphosphenia lingulatiformis
Gomphosphenia grovei
Grunowia
Grunowia tabellaria
Grunowia sinuata
Halamphora
Halamphora montana
Halamphora normanii
Halamphora oligotraphenta
Halamphora veneta
Halamphora latecostata
Halamphora elongata
Hannaea
Hannaea arcus
Hippodonta
Hippodonta coxiae
Hippodonta gravistriata
Hippodonta capitata subsp. iberoamericana
Hippodonta hungarica
Hippodonta capitata
Humidophila
Humidophila pantropica
Karayevia
Karayevia ploenensis var. gessneri
Karayevia clevei
Kobayasiella
Kobayasiella subtilissima
Kobayasiella jaagii
Kobayasiella okadae
Kobayasiella parasubtilissima
Kurtkrammeria
Kurtkrammeria aequalis
Kurtkrammeria neoamphioxys
Lemnicola
Lemnicola hungarica
Lindavia
Lindavia delicatula
Lindavia comensis
Lindavia michiganiana
Lindavia praetermissa
Lindavia radiosa
Lindavia antiqua
Luticola
Luticola ventricosa
Luticola ignorata
Luticola arctica
Luticola goeppertiana
Luticola hamiltonii
Mastogloia
Mastogloia binotata
Melosira
Melosira dickiei
Meridion
Meridion anceps
Meridion circulare
Meridion alansmithii
Muelleria
Muelleria gibbula
Navicula
Navicula kotschyi
Navicula metareichardtiana
Navicula antonii
Navicula canalis
Navicula veneta
Navicula eileeniae
Navicula cincta
Navicula seibigiana
Navicula subrostellata
Navicula supleeorum
Navicula cryptofallax
Navicula staffordiae
Navicula cryptocephala
Navicula gregaria
Navicula libonensis
Navicula salinarum
Navicula aitchelbee
Navicula erifuga
Navicula capitatoradiata
Navicula lundii
Navicula elsoniana
Navicula germainii
Navicula leptostriata
Navicula notha
Navicula recens
Navicula subrhynchocephala
Navicula trivialis
Navicula perotii
Navicula geronimensis
Navicula duerrenbergiana
Navicula angusta
Navicula venerablis
Navicula radiosa
Navicula genovefae
GC
Navicymbula
Navicymbula pusilla
Neidiomorpha
Neidiomorpha binodiformis
Neidiopsis
Neidiopsis hamiltonii
Neidiopsis levanderi
Neidiopsis wulffii
Neidium
Neidium hercynicum
Nitzschia
Nitzschia innominata
Nitzschia fonticoloides
Nitzschia perminuta
Nitzschia alpina
Nitzschia liebethruthii
Nitzschia desertorum
Nitzschia semirobusta
Nitzschia valdecostata
Nitzschia palea var. debilis
Nitzschia acidoclinata
Nitzschia minuta
Nitzschia palea var. tenuirostris
Nitzschia amphibia
Nitzschia communis
Nitzschia oregona
Nitzschia palea
Nitzschia oligotraphenta
Nitzschia incognita
Nitzschia sociabilis
Nitzschia paleacea
Nitzschia brevissima
Nitzschia fonticola
Nitzschia balcanica
Nitzschia exilis
Nitzschia clausii
Nitzschia columbiana
Nitzschia dissipata
Nitzschia reversa
Nitzschia acicularis
Nitzschia filiformis
Nitzschia sigma
Nupela
Nupela scissura
Nupela wellneri
Nupela impexiformis
Nupela decipiens
Nupela pennsylvanica
Nupela lapidosa
Nupela poconoensis
Nupela frezelii
Nupela subrostrata
Odontidium
Odontidium mesodon
Odontidium hyemale
Oxyneis
Oxyneis binalis var. elliptica
Peronia
Peronia fibula
Pinnularia
Pinnularia marchica
Pinnularia saprophila
Pinnularia divergentissima
Pinnularia borealis
Pinnularia borealis var. lanceolata
Pinnularia brebissonii
Pinnularia nodosa
Pinnularia nodosa var. percapitata
Placoneis
Placoneis abiskoensis
Planothidium
Planothidium potapovae
Planothidium abbreviatum
Planothidium delicatulum
Planothidium reichardtii
Planothidium incuriatum
Planothidium amphibium
Planothidium biporomum
Planothidium holstii
Planothidium sheathii
Planothidium apiculatum
Planothidium lanceolatoides
Planothidium joursacense
GC
Platessa
Platessa hustedtii
Platessa stewartii
Platessa lutheri
Platessa conspicua
Platessa oblongella
Platessa strelnikovae
Playaensis
Playaensis circumfimbria
Prestauroneis
Prestauroneis protracta
Proschkinia
Proschkinia browderiana
Psammothidium
Psammothidium nivale
Psammothidium chlidanos
Psammothidium daonense
Psammothidium bioretii
Psammothidium helveticum
Psammothidium lacustre
Psammothidium harveyi
Psammothidium alpinum
Psammothidium obliquum
Pseudostaurosira
Pseudostaurosira robusta
Pseudostaurosira parasitica
Pseudostaurosira americana
Pulchellophycus
Pulchellophycus schwabei
Reimeria
Reimeria sinuata
Reimeria uniseriata
Rhoicosphenia
Rhoicosphenia abbreviata
Rhoicosphenia stoermeri
Rossithidium
Rossithidium petersenii
Rossithidium anastasiae
Sellaphora
Sellaphora subfasciata
Sellaphora javanica
Sellaphora subbacillum
Sellaphora disjuncta
Sellaphora stauroneioides
Sellaphora rexii
Sellaphora californica
Sellaphora hohnii
Semiorbis
Semiorbis eliasiae
Skabitschewskia
Skabitschewskia oestrupii
Skabitschewskia peragalloi
Stauroforma
Stauroforma exiguiformis
Stauroneis
Stauroneis smithii
Stauroneis smithii var. incisa
Stauroneis livingstonii
Stauroneis neohyalina
Stauroneis kootenai
Stauroneis bryocola
Stauroneis schroederi
Staurophora
Staurophora tackei
Staurophora soodensis
Staurophora wislouchii
Staurosira
Staurosira stevensonii
Staurosirella
Staurosirella berolinensis
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 niagarae
Surirella
Surirella suecica
Surirella iowensis
Surirella brebissonii
Surirella angusta
Surirella ovalis
Synedra
Synedra famelica
Tabellaria
Tabellaria fenestrata
Tabellaria flocculosa
Tabularia
Tabularia fasciculata
Tetracyclus
Tetracyclus hinziae
Tetracyclus glans
Thalassiosira
Thalassiosira minima
Thalassiosira weissflogii
Thalassiosira baltica
Thalassiosira lacustris
Tryblionella
Tryblionella lanceola