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          • Actinocyclus
          • Actinoptychus
          • Actinoptychus senarius
          • Actinoptychus splendens
          • Actinoptychus sp. indeterminata
          • Arachnodiscus
          • Asteromphalus
          • Aulacodiscus
          • Aulacodiscus argus
          • Aulacodiscus kittonii
          • Aulacoseira
          • Coscinodiscus
          • Cyclotella
          • Cyclotella baltica
          • Ditylum
          • Endictya
          • Hyalodiscus
          • Lindavia
          • Melosira
          • Melosira mauryana (extinct)
          • Melosira moniliformis
          • Melosira nummuloides
          • Melosira varians
          • Paralia
          • Podosira
          • Skeletonema
          • Stephanocyclus
          • Stephanodiscus
          • Stephanodiscus cf. carconensis
          • Stephanopyxis
          • Stictocyclus stictodiscus
          • Thalassiosira
          • indeterminata
          • Biddulphia
          • Biddulphiopsis titiana
          • Cerataulus
          • Chaetoceros
          • Cymatosira
          • Dimeregramma
          • Eucampia
          • Gonioceros
          • Hydrosera
          • Isthmia nervosa
          • Lampriscus
          • Odontella aurita
          • Odontella longicruris
          • Plagiogramma
          • Plagiogrammopsis
          • Pleurosira
          • Rhizosolenia
          • Symbolophora amblyoceros
          • Terpsinoe musica
          • Toxarium hennedyanum
          • Triceratium
          • Trigonium
          • indeterminata
          • Araphid
          • Ardissonea
          • Asterionella
          • Asterionellopsis
          • Catacombas gaillonii
          • Climacosphenia
          • Delphineis
          • Fragilaria
          • Fragilariforma
          • Grammatophora
          • Hannaea arcus
          • Hyalosynedra
          • Licmophora
          • Meridion
          • Neosynedra
          • Opephora
          • Rhabdonema
          • Rhaphoneis
          • Staurosira
          • Staurosirella
          • Synedra
          • Tabellaria
          • Tabularia
          • Thalassiothrix longissima
          • Ulnaria
          • Ulnaria ulna
          • indeterminata
          • Monoraphid
          • Achnanthes
          • Achnanthes longipes
          • Achnanthidium
          • Anorthoneis
            • Cocconeis
            • Cocconeis dirupta
            • Cocconeis disculus
            • Cocconeis grovei
            • Cocconeis heteroidea
            • Cocconeis pediculus
            • Cocconeis pellucida
            • Cocconeis pinnata
            • Cocconeis placentula
            • Cocconeis pseudomarginata
            • Cocconeis rugosa
            • Cocconeis scutellum
          • Planothidium
          • Psammothidium
          • indeterminata
          • Eunotia
          • Eunotia formica
          • Eunotia incisa
          • Eunotia metamonodon
          • Eunotia monodon
          • Eunotia paludosa
          • Eunotia praerupta
          • Eunotia serra
          • Aneumastus
          • Anomoeoneis sphaerophora
          • Berkeleya
          • Biremis
          • Brachysira
          • Caloneis
          • Cavinula
          • Cosmioneis
          • Craticula
            • Diploneis
            • Diploneis nitescens
            • Diploneis smithii
            • Diploneis weissflogii
            • Diploneis sp. indeterminata
          • Donkinia
          • Fallacia
          • Frustulia
          • Geissleria
          • Gyrosigma
          • Gyrosigma eximium
          • Haslea
          • Luticola
          • Lyrella
          • Mastogloia
          • Mastogloia pseudoexigua
          • Mastogloia pumila
          • Mastogloia smithii
            • Navicula
            • Navicula angusta
            • Navicula arenaria
            • Navicula digitoradiata
            • Navicula directa
            • Navicula palpebralis
            • Navicula rostellata
            • Navicula walkeri
          • Neidium
          • Parlibellus delognei
          • Parlibellus rhombicus
          • Petroneis
            • Pinnularia
            • Pinnularia borealis
            • Pinnularia cf. mesogongyla
            • Pinnularia neomajor var. inflata
            • Pinnularia nobilis var. regularis
          • Plagiotropis
          • Pleurosigma
          • Pleurosigma aestuarii
          • Pleurosigma angulatum
          • Scolioneis
          • Sellophora
            • Stauroneis
            • Stauroneis acuta
            • Stauroneis rex
          • Staurophora
          • Trachyneis
          • Trachyneis aspera
          • indeterminata
          • Amphora
          • Amphora decussata
          • Climaconeis
            • Cymbella
            • Cymbella aspera
            • Cymbella cistula
            • Cymbella delicatula
            • Cymbella janischii
            • Cymbella mexicana
            • Cymbella naviculiformis
            • Cymbella proxima
            • Cymbella tumida
          • Cymbopleura apiculata
          • Didymosphenia geminata
          • Encyonema
          • Encyonema minutum form
          • Entomoneis
          • Entomoneis alata
          • Entomoneis punctulata
            • Gomphocymbella
            • Gomphoneis
            • Gomphonema
            • Gomphonema acuminatum
          • Peronia
          • Reimeria sinuata
          • Rhoicosphenia
          • Rhoicosphenia abbreviata
          • Undatella quadrata
          • indeterminata
          • Epithemia
          • Epithemia sorex
          • Epithemia turgida
          • Rhopalodia
          • Rhopalodia brebissonii
          • Rhopalodia gibba
          • Bacillaria paradoxa
          • Cylindrotheca
          • Denticula
          • Fragilariopsis
          • Hantzschia
            • Nitzschia
            • Nitzschia amphibia
            • Nitzschia angularis
            • Nitzschia dissipata
            • Nitzschia inconspicua
            • Nitzschia koleczeckii
            • Nitzschia linearis
            • Nitzschia longissima
            • Nitzschia palea
            • Nitzschia rhopalodioides
            • Nitzschia scalaris
            • Nitzschia scalpelliformis
            • Nitzschia sigma
            • Nitzschia sp.
            • Nitzschia ventricosa
          • Psammodictyon panduriforme
          • Pseudo-nitzschia
          • Tryblionella
          • Tryblionella coarctata
          • Tryblionella navicularis
          • Tryblionella punctata
          • indeterminata
          • Campylodiscus
          • Campylodiscus clypeus
          • Campylodiscus daemelianus
          • Campylodiscus hibernicus
          • Campylodiscus intermedius
          • Cymatopleura
          • Cymatopleura cochlea
          • Cymatopleura solea
          • Hydrosilicon mitra
          • Petrodictyon
          • Plagiodiscus
          • Stenopterobia sigmatella
          • Surirella
          • Surirella biseriata
          • Surirella elegans
          • Surirella fastuosa
          • Surirella robusta
          • Surirella striatula
          • Arrangements
          • Colonies
          • Diatomite
          • Epiphytes
          • Epipsammic
          • Parasites
          • Strews
        • Anabaena
        • Calothrix
        • Cyanobacterial Mat
        • Lyngbya
        • Microcystis
        • Nostoc
        • Oscillatoria
        • Stigonema
        • indeterminata
        • Cladophora
        • Draparnaldia
        • Haematococcus
        • Hydrodictyon
        • Microspora
        • Oedogonium
        • Pandorina
        • Pediastrum
        • Spirogyra
        • Volvox
        • Zoochlorella
          • Closterium
          • Cosmarium
          • Netrium
          • Staurastrum
        • indeterminata
      • indeterminata
        • Ciliophora
        • Epistylis
        • Euplotes
        • Paramecium
        • Stentor
        • Vorticella
        • indeterminata
        • Heliozoan
        • Sarcodina
        • Amoeba
        • Arcella
        • Foraminifera
      • indeterminata
      • indeterminata
    •  Locale Images
      • Sitka.Halibut Point
      • Royston Mud Flat
        • China Ranch
        • Salt Flat
        • Salt Creek Seep
        • Surprise Canyon
        • Pacheco
        • Point Reyes.Drakes Estero
        • Tomales Bay.Inverness mud flat
      • South Boulder Creek
      • St-Laurent-la-Vernede
      • Honaunau Bay
      • Refuge
      • Portglenone
      • Pemaquid Pt.Little Beach
      • Ash Meadows
        • All Beaches
        • Beverly Beach
        • Bob Straub St Pk
        • Cape Meares
        • Cape Meares Eel Grass
        • Cape Meares Sieve Tray
        • Hobbit Beach
        • Nye Beach
        • Wakonda Surf
        • Winema
        • Yachats
        • Sand Lake - Whalen Island
        • Portland
        • Deepwood Garden
        • Civic Center Pond
        • Civic Center pond.near inlet fountain
        • Civic Center pond.outflow
        • Cottage Street
        • Hay Infusion Culture
        • Sierra Drive Ditch
        • Sky Terrace.Fountain
        • Snow Peak Ditch
        • Timberline Lane Bird bath
        • Sarracenia water dish
        • Senoj Lk
        • Terrebonne Fossil Beds
        • Cairn Cove
        • Salem.Minto-Brown Pk
        • Salem.Minto-Brown Pk.Gravel bar
        • Salem.Minto-Brown Pk.Gravel Bar.Backwater
        • Salem.Minto-Brown Pk.Gravel Bar.Dry Algal Mat
        • Salem.Minto-Brown Pk.Gravel bar.Spirogyra pool
        • Hay Infusion Culture (2008-01-13)
        • Drakes Estero -- Sample 1 -- Algae (2014-02-07)
        • Drakes Estero -- Sample 2 -- Mud (2014-02-07)
        • Halibut Pt Park (2011-06-27)
        • Little Beach (2011-09-12)
        • Royston Tidal Flat (2015-09-08)
        • Tomales Bay (2012-05-04)
        • Whalen Is, Sand Lake Estuary (2013-07-21)
      • Portglenone Subfossil (2011-05-01)
      • Terrebonne Diatomite (2010-10-16)
      • Waldo Lake (2014-09-08)
      • Senoj Lake (2015-08-02)
        • Bandon Cliff (2015-04-13)
        • Miocene - France (2009-09-01)
        • Siltstone on Coast (2008-01-01)
        • Bob Straub Beach (2011-02-19)
        • Cape Meares Beach (2014-11-29)
        • Cape Meares Filtered Foam (2016-01-27)
        • Cape Meares Sand Pool (2016-01-26)
        • Cape Meares Tray Biofilm (2016-01-26)
        • Hobbitt Beach Pool (2015-05-28)
        • Nye Beach (2013-12-29)
        • Wakonda Beach (2013-11-10)
        • Winema Beach (2010-01-16)
        • Yachats Surf (2010-11-20)
        • Yachats Surf (2011-11-15)
        • Honaunau Bay (2009-03-03)
        • Honaunau Bay (2015-02-28)
        • Cape Meares Eel Grass Flotsam (2016-01-27)
        • Attached Algae (2010-08-26)
        • Civic Center Floating Mat (2013-09-19)
        • Civic Center Pond Scum (2013-06-14)
        • Edge of gravel pond (2010-08-28)
        • Civic Center Pond Elodea Leaves (2014-07-01)
        • Civic Center Pond Elodea Leaves (2014-07-30)
        • Lily Pond Floc (2011-08-09)
        • Sculptures at Portland State (2010-01-30)
        • Bumper Sticker (2012-12-25)
        • Civic Center Pond N Edge (2013-06-30)
        • Civic Center Pond N Edge (2013-07-02)
        • Civic Center Pond Rock Scum (2009-11-18)
        • Honaunau Refuge Pond (2015-02-28)
        • Sarracenia Water Dish (2010-05-10)
        • Timberline Bird Bath (2008-07-07)
        • Civic Center Pond Open Mud (2012-03-29)
        • Civic Center Pond Algal Mat (2013-05-21)
        • Sierra Dr ditch (2010-12-28)
        • Sky Terrace Fountain-1 (2008-08-09)
        • Snow Peak Ditch-1 (2008-01-12)
        • Snow Peak Ditch-2 (2010-01-12)
        • Willamette River Dried Algal Mat (2013-08-24)
        • Sky Terrace Fountain-2 (2009-11-12)
        • Sky Terrace Fountain-3 (2010-05-16)
        • Sky Terrace Fountain-4 (2011-08-19)
        • Sky Terrace Fountain-5 (2011-10-30)
        • Algae on rock. (2007-08-22)
        • Algae on rock. (2008-07-24)
        • Amargosa River China Ranch Tribuary (2012-01-04)
        • Amargosa River Salt Flat (2012-01-08)
        • Pringle Creek at Deepwood (2009-05-06)
        • Willamette Riffle (2011-08-05)
        • Willamette River Algal Clump (2015-10-11)
        • Willamette River Backwater (2014-08-04)
        • Ash Meadows Pupfish Pool (2011-04-11)
        • Civic Center Pond Inlet Fountain (2013-02-08)
        • Civic Center Pond Inlet Tile (2015-03-25)
        • Civic Center Pond Outlet Back Eddy (2012-03-29)
        • Civic Center Pond Rock (2015-10-27)
        • Civic Center Pond Tile (2014-07-30)
        • Pacheco Pool (1973-08-28)
        • S Boulder Creek at Milton Boulder (2014-10-16)
        • Spirogyra Pool (2010-09-17)
        • Surprise Canyon Pebble (2011-01-17)
        • Willamette River Gravel Pool (2010-07-25)
        • Gravel Rock Scrub (2011-11-10)
        • Salt Creek Seep (2016-03-10)
        • Willamette River Rock Scrub (2009-09-13)
        • Willamette River Rock Scrub (2015-07-24)
        • Civic Center Pond Outlet (2012-11-28)
        • Civic Center Outflow Grass Stem (2014-01-30)
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