List of marine benthic diatoms found in the sublittoral zone
along the southern coast of Brittany.

Achnanthes amoena Hustedt
Achnanthes brockmannii Simonsen
Achnanthes citronella (A. mann) Hustedt in Scmidt et al.
Achnanthes danica (Flögel) Grunow
Achnanthes longipes Agardh
Achnanthes lorenziana (Grunow) Cleve
Achnanthes sp. aff. brockmannii Simonsen
Achnanthes sp. cf. brockmannii Simonsen
Achnanthes sp. cf. danica (Flögel) Grunow
Achnanthes sp. cf. fimbriata (Grunow) Ross
Achnanthes sp. : 3 taxa
Actinocyclus octonarius var. crassus (W. Smith) hendey
Actinocyclus octonarius var. ralfsii (W. Smith) Hustedt
Actinocyclus octonarius var. tenellus (Brébisson) Hendey
Actinocyclus curvatulus Janisch in A. Schmidt
Actinoptychus senarius (Ehrenberg) Ehrenberg
Amphiprora decussata Grunow
Amphiprora hyalina Greville
Amphiprora lata Greville
Amphitetras antediluviana Ehrenberg
 
Amphora abludens Simonsen ?
Amphora acuta var. arcuata A. Schmidt
Amphora acutiuscula Kützing  / Halamphora acutiuscula (Kützing) Levkov
Amphora arcus Gregory
Amphora arcus var. sulcata A. Schmidt
Amphora arenaria var. donkinii (Rabenhorst) Cleve
Amphora arenaria var. rattrayi Cleve ?
Amphora arenicola Grunow
Amphora aspera Petit
Amphora bigibba var. interrupta Grunow
Amphora bigibbosa Cleve
Amphora bioculata Cleve
Amphora cingulata Cleve
Amphora coffeaeformis (Agardh) Kützing
Amphora costata W. Smith / Halamphora costata (W. Smith) Levkov
Amphora crassa Gregory
Amphora cuneata Cleve / Halamphora cuneata (Cleve) Levkov
Amphora cymbifera Gregory / Halamphora cymbifera (Gregory) Levkov
Amphora decussata Grunow
Amphora dubia Gregory ?
Amphora egregia Ehrenberg ?
Amphora egregia var. exornata Janisch
Amphora egregia var. ininterrupta Peragallo
Amphora elegans Peragallo
Amphora exigua Gregory / Halamphora exigua (Gregory) Levkov
Amphora formosa Cleve
Amphora gigantea var. fusca A. Schmidt
Amphora gigantea var. obscura Cleve
Amphora graeffeana Hendey
Amphora graeffi Grunow
Amphora grevilleana Gregory
Amphora grevilleana var. contracta Cleve
Amphora holsatica Hustedt
Amphora holsaticoides Nagumo & Kobayasi
Amphora inflexa (Climaconeis inflexa) (Brébisson ex Kützing) H.L. Smith
Amphora laevis Gregory
Amphora laevissima Gregory
Amphora laevissima var. perminuta Grunow
Amphora limbata Cleve
Amphora lineolata Grunow
Amphora maletracta var. constricta (Heiden) Simonsen
Amphora marina var. minima Cleve
Amphora marina W. Smith
Amphora nana Gregory f. parva
Amphora obtusa Gregory
Amphora obtusa var. radula Cleve
Amphora ocellata Donkin
Amphora ocellata var. subacuta Peragallo
Amphora ostrearia Brebisson ex Kützing
Amphora ostrearia var. belgica Grunow
Amphora ostrearia var. lineata Cleve
Amphora ostrearia var. vitrea (Cleve) Cleve
Amphora ostrearia var. quadrata Brebisson
Amphora proteus Gregory
Amphora proteus  var. oculata Peragallo
Amphora pseudoholstica Nagumo & Kobayasi
Amphora pseudohyalina Simonsen
Amphora pusio Cleve
Amphora rhombica var. intermedia Cleve
Amphora salina W. Smith
Amphora securicula Peragallo
Amphora sp. cf. jestosorum Witkowski, Metzeltin & Lange-Bertalot
Amphora sp. : 10 taxa
Amphora spectabilis Gregory
Amphora subangularis Hustedt / Halamphora subangularis (Hustedt) Levkov
Amphora turgida Gregory / Halamphora turgida (Gregory) Levkov
 
Ardissonia crystallina var. conspicua Grunow
Ardissonia crystallina var. dalmatica Grunow
Ardissonia crystallina (C.A. Agardh) Grunow
Asteromphalus flabellatus(Brebisson) Greville
Asteromphalus parvulus Karsten
Attheya decora West
Auricula adriatica Peragallo
Auricula / Amphiprora complexa Gregory
Auricula decipiens (Grunow) Cleve
Bacillaria paxillifer (O.F. Müller) Hendey var. paxillifer
Bacillaria praelonga (Cleve) De Toni
Bacillaria socialis (Gregory) Ralfs
Bacillaria socialis var. massilensis Grunow
Berkeleya rutilans (Trentepohl) Grunow
Berkeleya scopulorum (Brébisson ex Kützing) Cox
Biddulphia alternans (Bailey) Van heurck
Biddulphia pulchella Gray
Biremis ambigua (Cleve) D.G. Mann
Biremis sp. : 5 taxa
Caloneis aemula (Grunow ex A. Schmidt )Cleve
Caloneis bicuneata (Grunow) Wolle
Caloneis excentrica (Grunow) Boyer
Caloneis linearis (Grunow) Boyer
Campylodiscus decorus Brebisson
Campylodiscus fastuosus Ehrenberg
Campylodiscus impressus Grunow
Campyloneis grevillei (W. Smith) Grunow
Catenula sp. : 6 taxa
Cocconeiopsis breviata (Hustedt) comb. nov. ?
Cocconeiopsis fraudulenta (A. Schmidt) Witkowski, Lange-Bertalot & Metzeltin
Cocconeiopsis wrightii (O’meara) comb. nov.
 
Cocconeis britannica Naegeli in Kützing
Cocconeis clandestina A. Schmidt
Cocconeis costata Gregory
Cocconeis debesi Hustedt
Cocconeis dirupta Gregory
Cocconeis discrepans A. Schmidt
Cocconeis distans Gregory
Cocconeis fluminensis (Grunow) Peragallo
Cocconeis grata A. Schmidt
Cocconeis guttata Hustedt in Aleem & Hustedt
Cocconeis heteroidea Hantzsch
Cocconeis latecostata Hustedt ?
Cocconeis molesta var. crucifera Grunow in Van Heurck
Cocconeis molesta var. amygdalina (Brebisson) Grunow
Cocconeis multiperforata De Stefano
Cocconeis nummularia (Greville) Peragallo
Cocconeis ornata Gregory
Cocconeis peltoides Hustedt
Cocconeis pinnata Gregory ex Greville
Cocconeis pseudomarginata Gregory
Cocconeis schmidtii Heiden in Heiden & Kolbe?
Cocconeis scutellum Ehrenberg
Cocconeis scutellum var. minutissima Grunow
Cocconeis scutellum var. parva Grunow
Cocconeis sp. cf. distans Gregory
Cocconeis sp. cf. heteroidea Hantzsch 
Cocconeis sp. : 2 taxa
Cocconeis speciosa Gregory
Cocconeis speciosa Gregory var. obliqua
Cocconeis stauroneiformis (W. Smith) Okuno
 
Coscinodiscus asteromphalus Ehrenberg
Coscinodiscus curvatulus Grunow
Coscinodiscus decrescens Grunow in Schmidt
Coscinodiscus egregius Rattray
Coscinodiscus leptopus Grunow in Van heurck
Coscinodiscus marginatus Ehrenberg
Coscinodiscus oculus-iridis Ehrenberg
Coscinodiscus radiatus Ehrenberg
 
Cylindrotheca closterium Reimann & Lewin
Cymatoneis circumvallata Cleve
Cymatoneis sulcata Gregory
Delphineis surirella (Ehrenberg) Andrews
Dickieia subinflata (Grunow) D.G. Mann
Dimeregrammopsis furcigerum (Grunow) Ricard
 
Diploneis aestuarii Hustedt
Diploneis advena var.sansegana (Grunow) Cleve
Diploneis apis Donkin
Diploneis beyrichiana A. Schmidt
Diploneis bomboides (A. Schmidt) Cleve
Diploneis bombus Ehrenberg
Diploneis bombus var. densestriata A. Schmidt
Diploneis chersonensis (Grunow) Cleve ?
Diploneis coffeaeformis (Grunow) Cleve
Diploneis constricta (Grunow) Cleve
Diploneis crabro Ehrenberg
Diploneis crabro var. excavata Hustedt
Diploneis crabro var. minuta Cleve
Diploneis crabro var. multicostata Grunow
Diploneis crabro var. pandura (Brébisson) Cleve
Diploneis crabro var. perpusilla Cleve
Diploneis crabro var. separabilis A. Schmidt
Diploneis didyma (Ehrenberg) Cleve
Diploneis divergens A. Schmidt
Diploneis eudoxia A. Schmidt
Diploneis fusca (Gregory) Cleve
Diploneis fusca var. aestiva (Donkin) Hustedt
Diploneis fusca var. amphigomphus Hustedt
Diploneis fusca var. pelagica (A. Schmidt) Cleve
Diploneis fusca var. hyperborea (Grunow) Hustedt
Diploneis incurvata f. stricta Hustedt
Diploneis incurvata var. dubia Hustedt
Diploneis incurvata (Gregory) Cleve
Diploneis kützingii Grunow
Diploneis lineata (Donkin) Cleve
Diploneis litoralis (Donkin) Cleve
Diploneis mediterranea (Grunow) Cleve
Diploneis mirabilis König
Diploneis nitescens Gregory
Diploneis notabilis (Greville) Cleve
Diploneis papula (A. Schmidt) Cleve
Diploneis papula var. constricta Hustedt
Diploneis parca (A. Schmidt) Boyer
Diploneis rex Droop
Diploneis smithii var. cuneata (Cleve) Hustedt
Diploneis smithii var. recta M. Peragallo
Diploneis smithii var. rhombica Mereschkowsky
Diploneis smithii (Brebisson) Cleve
Diploneis sp. cf. eudoxia A. Schmidt
Diploneis sp. : 2 taxa
Diploneis subcincta (A. Schmidt) Cleve
Diploneis suborbicularis (Gregory) Cleve
Diploneis vacillans (A. Schmidt) Cleve
Diploneis vetula (A. Schmidt) Cleve
Diploneis weissflogii (A. Schmidt) Cleve
 
Donkinia recta (Donkin) Grunow
Donkinia recta var. intermedia H. peragallo
Donkinia sp. cf. carinata Donkin
Entomoneis gigantea (Grunow) Nizamuddin
Entomoneis paludosa (W. Smith) Reimer var. paludosa
Entomoneis sulcata O’Meara
Entomoneis venusta Greville
 
Fallacia clypeiformis (König) D.G. Mann in Round et al. ?
Fallacia forcipata (Greville) Stickle & D.G. Mann in Round et al.
Fallacia forcipata var. densestriata A. Schmidt
Fallacia forcipata var. elongata Peragallo
Fallacia forcipata var. suborbicularis Grunow
Fallacia ny (Cleve) D.G. Mann in Round et al.
Fallacia nyella (Hustedt) D.G. Mann in Round et al. ?
Fallacia reichardtii (Grunow in Van Heurck) comb. nov.
Fallacia scaldensis Sabbe & Muylaert
Fallacia sp. cf. shoemaniana (Foged) comb. nov.
Fallacia sp. : 2 taxa
Fallacia versicolor (Grunow) D.G. Mann in Round et al.
 
Fogedia sp.
Fragilaria investiens (W. Smith) Cleve-Euler
Fragilaria pulchella (Ralfs ex Kützing) Lange-Bertalot
Fragilariopsis oceanica (Cleve) Hasle ?
Glyphodesmis distans (Gregory) Grunow in Van Heurck
Glyphodesmis sp. cf. distans (Gregory) Grunow in Van Heurck
Grammatophora angulosa Ehrenberg
Grammatophora marina (Lyngbye) Kützing
Grammatophora oceanica (Ehrenberg) Grunow
Grammatophora serpentina (Ralfs) Ehrenberg
Grammatophora serpentina var. elongata Peragallo
 
Gyrosigma acuminatum var. gallica Grunow
Gyrosigma diminutum var. constricta Grunow
Gyrosigma fasciola (Ehrenberg) Cleve
Gyrosigma fasciola var. closterioides Grunow
Gyrosigma fasciola var. prolongata W. Smith
Gyrosigma reversum (Gregory) Hendey
Gyrosigma spenceri W. Smith
Gyrosigma tenuissimum W. Smith
 
Hantzschia marina (Donkin) Grunow
Hantzschia spectabilis (Ehrenberg) Hustedt
Hantzschia vivax (W. Smith) M. Peragallo in Tempere & Peragallo
Haslea sp. cf. balearica (Cleve) Witkowski, Lange-Bertalot & Metzeltin
Haslea britannica (Hustedt) Witkowski, Lange-Bertalot & Metzeltin
Haslea ostrearia (Gaillon) Simonsen
Hippodonta lesmonensis (Hustedt) Lange-Bertalot & Metzeltin
Hustedtiella sp. : 2 taxa
Hyalosynedra laevigata (Grunow) Williams & Round
Incertae sedis 1 to 6 sp. nova
Isthmia nervosa Kützing
 
Licmophora abbreviata Agardh
Licmophora ehrenbergii f. elegans (Mereschkowsky) Hustedt
Licmophora ehrenbergii f. grunowii (Mereschkowsky) Hustedt
Licmophora flabellata (Greville) Agardh
Licmophora juergensii Agardh
Licmophora nubecula (Kützing) Grunow
Licmophora oedipus (Kützing) Grunow
Licmophora paradoxa var. crystallina (Kützing) grunow
Licmophora paradoxa var. tincta (Agardh) Hustedt
Licmophora profondesepta Mereschkowsky
Licmophora reichardtii Grunow
 
Lunella ghalebii Witkowski, Lange-Bertalot & Metzeltin
 
Lyrella abrupta (Gregory) D.G. Mann in Round et al.
Lyrella atlantica (A. Schmidt) D.G. Mann in Round et al.
Lyrella clavata var. elongata (H. Peragallo) D.G. Mann in round et al.
Lyrella clavata (Gregory) D.G. Mann in Round et al.
Lyrella crebra  (Hustedt) DG Mann
Lyrella hennedyi (W. Smith) Stickle & D.G. Mann in Round et al.
Lyrella hennedyi var. cuneata (Grunow) Stickle & D.G. Mann in Round et al.
Lyrella hennedyi var. granulata (Grunow) Stickle & D.G. Mann in Round et al.
Lyrella hennedyi var. nebulosa (Gregory) Stickle & D.G. Mann in Round et al.
Lyrella lyra (Ehrenberg) Karayeva
Lyrella majuscula (Hustedt) Witkowski
Lyrella polysticta Greville
Lyrella polysticta var. circumsecta (Greville) D.G. Mann in Round et al.
Lyrella praetexta (Ehrenberg) D.G. Mann in Round et al.
Lyrella rudiformis  (Hustedt) Nevrova, Witkowski, Kulikowskiy & Lange-Bertalot
Lyrella sandriana (Grunow) D.G. Mann in Round et al.
Lyrella schonkenii Hustedt.
Lyrella spectabilis (Gregory) D.G. Mann in Round et al.
Lyrella sp. : 2 taxa
Lyrella venusta var. intermedia (Cleve) D.G. Mann in Round et al.
 
Mastogloia elegans Lewis
Mastogloia elliptica (Agardh) Cleve
Mastogloia exigua Lewis
Mastogloia gilberti A. Schmidt
Mastogloia pseudoexigua Cholnoky
Mastogloia smithii Thwaites
Mastogloia sp. cf. linearis Simonsen
Mastogloia sp. P
Mastogloia sp. 8
  
Navicula agnita Hustedt
Navicula archibaldiana Foged
Navicula arenaria Donkin var. arenaria
Navicula arenaria var. rostellata Lange-Bertalot
Navicula bipustulata A. Mann
Navicula bottnica Grunow in Cleve & Grunow
Navicula cancellata Donkin
Navicula crucifera Grunow ?
Navicula digitoradiata (Gregory) Ralfs in Pritchard
Navicula directa (W. Smith) Ralfs in Pritchard
Navicula distans (W. Smith) A. Schmidt ?
Navicula diversistriata Hustedt
Navicula flebilis Cholnoky
Navicula fortis Gregory
Navicula glabriuscula var. ellipsoidalis Proschkina-Lavrenko ?
Navicula hamiltonii Witkowski, Lange-Bertalot & Metzeltin?
Navicula lanceolata (Agardh) Kützing
Navicula longa Gregory
Navicula luxoriosa var. cuneata
Navicula mahoodii Witkowski & Witon
Navicula microdigitoradiata Lange-Bertalot
Navicula mollis (W. Smith) Cleve
Navicula northumbrica Donkin
Navicula opima Grunow
Navicula palpebralis Brebisson ex W. Smith var. palpebralis
Navicula palpebralis var. angulosa (Gregory) Van Heurck
Navicula palpebralis var. minor Grunow
Navicula palpebralis var. undulata Peragallo
Navicula pennata A. Schmidt
Navicula ramosissima (Agardh) Cleve
Navicula salva A. Schmidt
Navicula scandinavica Lagerstedt
Navicula sp. aff. gregaria Donkin
Navicula sp. aff. phylleptosoma Lange-Bertalot in Lange-Bertalot & Genkal
Navicula sp. cf. capillata Giffen
Navicula sp. cf. dehissa Giffen
Navicula sp. : 12 taxa
Navicula spuria Cleve
Navicula superimposita A. Schmidt
Navicula utlandshoerniensis Van Landigham
Navicula zostereti Grunow
 
Nitzschia aequorea Hustedt ?
Nitzschia agnita Hustedt ?
Nitzschia angularis W. Smith
Nitzschia angularis var. affinis Grunow
Nitzschia bilobata W. Smith
Nitzschia capitellata Hustedt in A. Schmidt
Nitzschia compressa (Bailey) Boyer var. compressa
Nitzschia didyma Hustedt
Nitzschia distans Gregory
Nitzschia fusiformis Grunow in Cleve & Grunow ?
Nitzschia hadriatica Lange-Bertalot
Nitzschia hybrida Grunow
Nitzschia insignis Gregory
Nitzschia insignis var. mediterranea Grunow
Nitzschia insignis var. nicaensis Peragallo
Nitzschia insignis var. spathulifera Grunow
Nitzschia lanceolata W. Smith
Nitzschia linkei Hustedt
Nitzschia longissima var. parva Peragallo
Nitzschia lorenziana Grunow in Cleve & Grunow
Nitzschia macilenta Gregory  
Nitzschia navicularis (Brébisson ex Kützing) Grunow
Nitzschia pellucida Grunow in Cleve & Grunow
Nitzschia reversa W. Smith
Nitzschia scalaris (Ehrenberg) W. Smith
Nitzschia sigma (Kützing) W. Smith
Nitzschia sp. aff. thermaloides Hustedt
Nitzschia sp. cf. amundonii Aleem
Nitzschia sp. cf. epithemioides Grunow in Cleve & Grunow
Nitzschia sp. cf. grossestriata Hustedt
Nitzschia sp. cf. majuscula Grunow
Nitzschia sp. cf. minuta Bleisch in Rabenhorst
Nitzschia sp. : 5 taxa
Nitzschia spathulata Brebisson in W. Smith
Nitzschia spathulata var. hyalina Gregory
Nitzschia tubicola Grunow in Cleve & Grunow
 
Oestrupia ergadensis (Gregory) Witkowski, Lange-Bertalot & Metzeltin
Opephora krumbeinii Witkowski, Witak & Stachura
Opephora marina (Gregory) Petit
Opephora sp. ?
Paralia sulcata (Ehrenberg) Cleve
Parlibellus delognei (Van heurck) Cox
Parlibellus protracta (Grunow) comb. nov.
Parlibellus protractoides (Hustedt) comb. nov.?
Parlibellus sp. cf. delognei (Van Heurck) Cox
Parlibellus sp. : 4 taxa
Perissonoe cruciata (Janisch & Rabenhorst) Andrews & Stoelzel
Petroneis humerosa (Brébisson) Stickle & D.G. Mann in Round et al.
Petroneis latissima (Gregory) Stickle & D.G. Mann in Round et al.
Petroneis monilifera (Cleve) Stickle & D.G. Mann in Round et al.
Pinnularia claviculus (Gregory) Rabenhorst
Pinnularia quadratarea var. cuneata Østrup
Plagiogramma interruptum (Gregory) Ralfs
Plagiogramma sp.
Plagiotropis gibberula Grunow
Plagiotropis lepidoptera var. lepidoptera (Gregory) Kuntze
Plagiotropis lepidoptera var. delicatula Greville
Plagiotropis lepidoptera var. minor (Cleve) Czarnecki & Wee
Plagiotropis vanheurckii Grunow ex Van Heurck
Planothidium lilljeborgei (Grunow) Witkowski, Lange-Bertalot & Metzeltin
Planothidium quarnerensis (Grunow) Witkowski, Lange-Bertalot & Metzeltin
 
Pleurosigma acutum Norman ex Ralfs
Pleurosigma affine var. normannii Ralfs
Pleurosigma angulatum (Quekett) W. Smith
Pleurosigma cuspidatum Cleve ?
Pleurosigma decoruum W. Smith
Pleurosigma delicatulum W. Smith ?
Pleurosigma elongatum W. Smith
Pleurosigma intermedium W. Smith
Pleurosigma longum var. inflata Peragallo
Pleurosigma longum var. lanceolata Peragallo
Pleurosigma marinum Donkin 
Pleurosigma naviculaceum Brébisson
Pleurosigma nicobaricum Grunow
Pleurosigma rigidum W. Smith
Pleurosigma sp. cf. ibericum Peragallo
Pleurosigma strigosum W. Smith
 
Pleurosira laevis (Ehrenberg) Compère
Podosira stelligera (Bailey) Mann
Progonoia amoena Cleve
Progonoia musca (Gregory)
Psammodiscus nitidus (Gregory) Round & Mann
Psammodyction panduriforme (Gregory) Mann
Psammodyction panduriforme var. continua (Grunow) Snoeijs
Raphoneis amphiceros (Ehrenberg) Ehrenberg
Raphoneis nitida Gregory
Rhabdonema adriaticum Kützing
Rhoicosigma compactum Greville
Rhoicosigma falcatum Donkin
Roperia sp. (tesselata (Roper) Grunow ?)
Seminavis sp.
Stauroneis africana Cleve
Stauroneis rossii Hendey
Staurophora (Stauroneis) salina (W. Smith) Mereschkowsky
Stauroneis sp. ?
Stauronella decipiens (Hustedt) Lange-Bertalot in Lange-Bertalot & Genkal
Stauronella smithii var. incisa Pantocsek
Stauronella sp. 
Stauronella indubitabilis Lange-Bertalot & Genkal
Striatella unipunctata (Lyngbye) Agardh
 
Surirella comis A. Schmidt
Surirella fastuosa (Ehrenberg) Kützing
Surirella fluminensis Grunow ?
Surirella hybrida Grunow
Surirella hybrida var. balteum Brun
Surirella lata A. Schmidt
Surirella lata var. macraena Greville
Surirella lata var. robusta O.N. Witt
Surirella pandura Peragallo
 
Synedra gaillonii (Bory) Ehrenberg
Synedra tabulata (C.A. Agardh) Kützing
Synedra tabulata var. parva (Kützing) Grunow
Thalassiophysa hyalina (Greville) Paddock & Sims
Thalassiosira angulata (Gregory) Hasle
Thalassiosira bioculata (Grunow) Ostenfeld
Thalassiosira eccentrica (Ehrenberg) Cleve
Thalassiosira gravida Cleve
Thalassiosira punctigera (Castracane) Hasle
Thalassiosira simonensii Hasle & Fryxell
Thalassiosira tenera  Proschkina-Lavrenko
Toxarium hennedyanum Grunow in Van heurck
Toxarium sp. cf. undulatum Bailey
Toxarium undulatum Bailey
Toxonidea balearica Cleve
Toxonidea insignis Donkin
Toxonidea insignis var. madagascarensis Peragallo
Trachyneis aspera A. Schmidt
Trachyneis aspera var. pulchella W. Smith
Triceratium antediluvianum Ehrenberg
Triceratium sp.
Tryblionella coarctata (Grunow) Mann ?
Tryblionella marginulata (Grunow) Mann
  
Unidentified genera : 10 taxa