Synedra acus Kützing 1980 [Link to DiatomBase]
Synedra acus f. continua Cleve-Euler 1953 [Link to DiatomBase]
Synedra acus f. radians (Kützing) Hustedt 1957 [Link to DiatomBase]
Synedra acus f. tumida Manguin 1954 [Link to DiatomBase]
Synedra acus var. neogena (Grunow) Metcalfe 1988 [Link to DiatomBase]
Synedra acus var. radians (Kützing) Cleve-Euler 1953 [Link to DiatomBase]
Synedra acus var. varipunctata John 1981 [Link to DiatomBase]
Synedra acus subsp. ostenfeldii (Krieger) Skabichevskii 1960
Synedra acus subsp. radians (Kützing) Skabichevskii 1960 [Link to DiatomBase]
Synedra adeliae Manguin 1957
Synedra adeliae Manguin 1960 [Link to DiatomBase]
Synedra affinis Kützing 1844 [Link to DiatomBase]
Synedra affinis var. obtusa Hustedt ex Simonsen 1987
Synedra affinis var. sinica Skvortzow 1935 [Link to DiatomBase]
Synedra affinis var. tristani Cleve-Euler 1949 [Link to DiatomBase]
Synedra alaskana Patrick & Freese 1961 [Link to DiatomBase]
Synedra allansonii Cholnoky 1958 [Link to DiatomBase]
Synedra allorgei Manguin 1942 [Link to DiatomBase]
Synedra amphicephala Kützing 1844 [Link to DiatomBase]
Synedra amphicephala Kützing 1844 [Link to DiatomBase]
Synedra amphicephala f. continua Cleve-Euler 1953 [Link to DiatomBase]
Synedra amphicephala f. mesoleia Cleve-Euler 1948 [Link to DiatomBase]
Synedra amphicephala var. asiatica Skvortzow 1935 [Link to DiatomBase]
Synedra amphicephala var. austriaca (Grunow in Van Heurck) Hustedt 1980 [Link to DiatomBase]
Synedra amphicephala var. austriaca (Grunow in Van Heurck) Hustedt 1844 [Link to DiatomBase]
Synedra amphicephala var. elliptica (Cleve-Euler) VanLandingham 1971 [Link to DiatomBase]
Synedra amphicephala var. genuina Cleve-Euler 1953 [Link to DiatomBase]
Synedra amphicephala var. imperfecta Cleve-Euler 1939 [Link to DiatomBase]
Synedra amphicephala var. intermedia Cleve-Euler 1953 [Link to DiatomBase]
Synedra amphicephala var. intermedia Manguin 1964 [Link to DiatomBase]
Synedra amphicephala var. septentrionalis (Řstrup) Cleve-Euler 1953 [Link to DiatomBase]
Synedra amphicephala var. tenuicapitata Manguin in Bourrelly & Manguin 1949 [Link to DiatomBase]
Synedra antarctica Heiden & Kolbe 1928 [Link to DiatomBase]
Synedra antarctica Heiden & Kolbe 1928 [Link to DiatomBase]
Synedra arcuata (Řstrup) Cleve-Euler 1953 [Link to DiatomBase]
Synedra arcuata var. subrecta Cleve-Euler 1953 [Link to DiatomBase]
Synedra baltica Ehrenberg [Link to DiatomBase]
Synedra bananaensis Kufferath 1956 [Link to DiatomBase]
Synedra barrowiana Patrick & Freese 1961 [Link to DiatomBase]
Synedra biharensis Hajós 1959 [Link to DiatomBase]
Synedra binodis (Ehrenberg) Chang & Steinberg 1988 [Link to DiatomBase]
Synedra brockmanni Hustedt 1932 [Link to DiatomBase]
Synedra camtschatica (kamtschatica) Grunow 1862 [Link to DiatomBase]
Synedra camtschatica (kamtschatica) var. antarctica Manguin 1960 [Link to DiatomBase]
Synedra capilla Carter & Denny 1992 [Link to DiatomBase]
Synedra capitata f. mesoleia Cleve-Euler 1953 [Link to DiatomBase]
Synedra capitata var. cuneata Poretzky 1953 [Link to DiatomBase]
Synedra capitata var. fossilis Stoermer 1963 [Link to DiatomBase]
Synedra capitata var. gracilis Poretzky 1940 [Link to DiatomBase]
Synedra capucina Stoermer & Kreis 1978 [Link to DiatomBase]
Synedra chandolensis Gandhi 1964 [Link to DiatomBase]
Synedra closterioides var. jaernefeltii (jarnefeltii) Molder 1939 [Link to DiatomBase]
Synedra columber (Brun) Kanaya 1963 [Link to DiatomBase]
Synedra constricta Kützing 1844 [Link to DiatomBase]
Synedra costata Hajós 1959 [Link to DiatomBase]
Synedra curvata Proschkina-Lavrenko 1951 [Link to DiatomBase]
Synedra cyclopum f. typica Cleve-Euler 1953 [Link to DiatomBase]
Synedra cyclopum f. ventralis Cleve-Euler 1953 [Link to DiatomBase]
Synedra cyclopum var. gibbosa Moghadam 1969 [Link to DiatomBase]
Synedra cyclopum var. gibbosa Moghadam 1969 [Link to DiatomBase]
Synedra cyclopum var. incisa Cunningham in Cunningham & Whitson 1978 [Link to DiatomBase]
Synedra cyclopum var. nipponica Skvortzow 1936 [Link to DiatomBase]
Synedra decloitrei Amossé 1970 [Link to DiatomBase]
Synedra delicatissima W. Smith 1853 [Link to DiatomBase]
Synedra distinguenda Hustedt 1932 [Link to DiatomBase]
Synedra distinguenda var. curta Giffen 1980 [Link to DiatomBase]
Synedra dorsiventralis f. biconstricta Manguin in Bourrelly & Manguin 1952 [Link to DiatomBase]
Synedra dorsiventralis f. symetrica Manguin 1952 [Link to DiatomBase]
Synedra elongatum Stoermer & Kreis 1978 [Link to DiatomBase]
Synedra famelica Kützing 1844 [Link to DiatomBase]
Synedra famelica var. enflata Zanon 1938 [Link to DiatomBase]
Synedra famelica var. hyalina Manguin 1954 [Link to DiatomBase]
Synedra famelica var. tenuicollis Manguin 1954 [Link to DiatomBase]
Synedra fasciculata f. densestriata (Moller) Archibald 1983 [Link to DiatomBase]
Synedra fasciculata var. intermedia (Grunow) Sullivan 1981 [Link to DiatomBase]
Synedra fasciculata var. parva (Kützing) Desikachary & Sridharan in Desikachary 1989 [Link to DiatomBase]
Synedra fasciculata var. truncata (Greville) Patrick 1966 [Link to DiatomBase]
Synedra filiformis Carter & Denny 1987 [Link to DiatomBase]
Synedra filiformis var. capitata Cleve-Euler 1953 [Link to DiatomBase]
Synedra filiformis var. curvata (Řstrup) Cleve-Euler 1953 [Link to DiatomBase]
Synedra filiformis var. curvipes Cleve-Euler 1953 [Link to DiatomBase]
Synedra filiformis var. curvipes Cleve-Euler 1953 [Link to DiatomBase]
Synedra filiformis var. exilis Cleve-Euler 1939 [Link to DiatomBase]
Synedra filiformis var. genuina Cleve-Euler 1953 [Link to DiatomBase]
Synedra filiformis var. major Cleve-Euler 1941 [Link to DiatomBase]
Synedra fisherensis Bond 1968 [Link to DiatomBase]
Synedra fragilarioides Hargraves & Guillard 1974 [Link to DiatomBase]
Synedra fragilis Manguin 1957
Synedra fragilis Manguin 1957
Synedra fragilis Manguin 1960 [Link to DiatomBase]
Synedra frustulum Kützing 1844 [Link to DiatomBase]
Synedra fuchsii (Pantocsek) Schrader 1969 [Link to DiatomBase]
Synedra fulgens var. fenestrata Zanon 1948 [Link to DiatomBase]
Synedra gaillonii var. cuneata Zanon 1948 [Link to DiatomBase]
Synedra gaillonii var. densestriata Rivera 1973 [Link to DiatomBase]
Synedra gaillonii var. genuina Cleve-Euler 1953 [Link to DiatomBase]
Synedra gaillonii var. longiceps Singh 1962 [Link to DiatomBase]
Synedra gaillonii var. major Komarovsky & Edelstein 1960 [Link to DiatomBase]
Synedra gausii var. trigibba Heiden & Kolbe 1928 [Link to DiatomBase]
Synedra gausii var. trigibba Heiden & Kolbe 1928 [Link to DiatomBase]
Synedra gaussii Heiden & Kolbe 1928 [Link to DiatomBase]
Synedra gelida (M. Peragallo) Mann 1937 [Link to DiatomBase]
Synedra gelida Frenguelli 1960 [Link to DiatomBase]
Synedra goulardi var. fluviatilis (Lemmermann) Frenguelli 1941 [Link to DiatomBase]
Synedra goulardii var. jeniseyensis Skvortzow 1971 [Link to DiatomBase]
Synedra goulardii var. mongolica (Skvortzow) Skvortzow 1971 [Link to DiatomBase]
Synedra goulardii var. telezkensis Poretzky in Poretzky & Scheschukova 1953 [Link to DiatomBase]
Synedra hantzschiana Sournia 1968 [Link to DiatomBase]
Synedra hartii Cholnoky 1963 [Link to DiatomBase]
Synedra heidenii Simonsen 1992 [Link to DiatomBase]
Synedra hennedyana var. capillaris Meister (1934)1935 [Link to DiatomBase]
Synedra homostriata Hohn 1961 [Link to DiatomBase]
Synedra hyperborea var. flexuosa Grunow 1844 [Link to DiatomBase]
Synedra hyperborea var. parvula Aleem 1949 [Link to DiatomBase]
Synedra inaequalis Kobayasi 1965 [Link to DiatomBase]
Synedra inaequalis Kobayasi validated by Kobayasi, Idei, Kobori & Tanaka 1987 [Link to DiatomBase]
Synedra inaequalis var. jumlensis I. Jüttner & E.J. Cox in I. Jüttner, E.J. Cox & S.J. Ormerod 2000 [Link to DiatomBase]
Synedra inaequalis var. jumlensis I. Jüttner & E.J. Cox in I. Jüttner, E.J. Cox & S.J. Ormerod 2000 [Link to DiatomBase]
Synedra incerta Mereschkowsky 1902 [Link to DiatomBase]
Synedra indica Taylor 1967 [Link to DiatomBase]
Synedra investiens f. rhomboidea Hustedt 1957 [Link to DiatomBase]
Synedra investiens f. rhomboidea Hustedt 1957 [Link to DiatomBase]
Synedra isabelae Patrick 1970 [Link to DiatomBase]
Synedra isabelae var. minor Patrick 1970 [Link to DiatomBase]
Synedra jogensis Gandhi 1966 [Link to DiatomBase]
Synedra jouseana Sheshukova-Poretzkaja 1962 [Link to DiatomBase]
Synedra jouseana f. linearis Sheshukova-Poretzkaja 1962 [Link to DiatomBase]
Synedra jouseana var. agapika Skabichevskaya 1984 [Link to DiatomBase]
Synedra juliana De Notaris emend Granetti 1968 [Link to DiatomBase]
Synedra kamschatica var. genuina Cleve-Euler 1953 [Link to DiatomBase]
Synedra karcheri Nemoto 1956 [Link to DiatomBase]
Synedra kashyapiens Misra 1956 [Link to DiatomBase]
Synedra kerguelensis Heiden & Kolbe 1928 [Link to DiatomBase]
Synedra kerguelensis var. antarctica Frenguelli & Orlando 1958 [Link to DiatomBase]
Synedra kinkeri (kinkerii) (Pantocsek) Jurilj 1957 [Link to DiatomBase]
Synedra koganii Mikhailov 1986 [Link to DiatomBase]
Synedra kullaaensis Tynni 1994 [Link to DiatomBase]
Synedra lancettula (Grunow) A. Cleve-Euler 1949 [Link to DiatomBase]
Synedra lata (Giffen) A. Witkowski in A. Witkowski, Lange-Bertalot & D. Metzeltin 2000 [Link to DiatomBase]
Synedra lenzi Krasske 1939 [Link to DiatomBase]
Synedra lenzi Krasske 1939 [Link to DiatomBase]
Synedra licenti Skvortzow 1935 [Link to DiatomBase]
Synedra mazamaensis Sovereign 1958 [Link to DiatomBase]
Synedra mazamaensis var. changbaiensis Bao & Reimer 1992 [Link to DiatomBase]
Synedra merluzae Frenguelli & Orlando 1959 [Link to DiatomBase]
Synedra minuscula var. capitata Skvortzow 1936 [Link to DiatomBase]
Synedra miocenica Schrader 1976 [Link to DiatomBase]
Synedra monodi Guermeur 1954 [Link to DiatomBase]
Synedra montana Krasske ex Hustedt 1932 [Link to DiatomBase]
Synedra mystica Archibald 1971 [Link to DiatomBase]
Synedra nana Meister 1912 [Link to DiatomBase]
Synedra nana f. capitata Manguin 1964 [Link to DiatomBase]
Synedra nana f. macrocapitata Tynni 1994 [Link to DiatomBase]
Synedra nana f. major Cleve-Euler 1953 [Link to DiatomBase]
Synedra nana f. minor Cleve-Euler 1953 [Link to DiatomBase]
Synedra nana var. genuina Cleve-Euler 1953 [Link to DiatomBase]
Synedra nana var. latior Cleve-Euler 1953
Synedra nana var. nipponica Skvortzow 1936 [Link to DiatomBase]
Synedra netronoides Hohn & Hellerman 1963 [Link to DiatomBase]
Synedra nipponica Skvortzow 1936 [Link to DiatomBase]
Synedra oamaruensis Schrader 1969 [Link to DiatomBase]
Synedra ossiformis Taylor 1967 [Link to DiatomBase]
Synedra parasitica f. lata Cleve-Euler 1953 [Link to DiatomBase]
Synedra parasitica f. subconstricta (Grunow in Van Heurck) Hustedt 1957 [Link to DiatomBase]
Synedra parasitica f. tenuis Cleve-Euler 1953 [Link to DiatomBase]
Synedra parasitica f. typica Cleve-Euler 1953 [Link to DiatomBase]
Synedra parasitica var. genuina (Mayer) Cleve-Euler 1953 [Link to DiatomBase]
Synedra parasitica var. intermedia Cleve-Euler 1953 [Link to DiatomBase]
Synedra parva var. brevistriata Cleve-Euler 1949 [Link to DiatomBase]
Synedra pelagica Cleve-Euler 1937 [Link to DiatomBase]
Synedra pelagica Hendey 1937 [Link to DiatomBase]
Synedra perexigua Cleve-Euler 1953 [Link to DiatomBase]
Synedra phantasma Hohn 1966 [Link to DiatomBase]
Synedra planktonica Hains & Sebring 1981 [Link to DiatomBase]
Synedra platensis var. angusta Frenguelli 1938 [Link to DiatomBase]
Synedra platensis var. obtusa Frenguelli 1945 [Link to DiatomBase]
Synedra platensis var. oxyrhynchus Frenguelli 1938 [Link to DiatomBase]
Synedra polymorpha (Pantocsek et Grunow) Schrader 1969 [Link to DiatomBase]
Synedra pseudogoulardii Manguin 1964 [Link to DiatomBase]
Synedra puellaris Messikommer 1945 [Link to DiatomBase]
Synedra pulchella f. constricta Hustedt 1930 [Link to DiatomBase]
Synedra pulchella f. lacerata (Hustedt in Schmidt et al.) Hustedt 1957 [Link to DiatomBase]
Synedra pulchella f. naviculacea (Grunow in Van Heurck) Hustedt 1957 [Link to DiatomBase]
Synedra pulchella f. typica Cleve-Euler 1953 [Link to DiatomBase]
Synedra pulchella var. gigas Cleve-Euler 1953 [Link to DiatomBase]
Synedra pulchella var. lacerata Hustedt in Schmidt et al. 1926 [Link to DiatomBase]
Synedra pulchella var. minuta Hustedt in Schmidt et al. 1930 [Link to DiatomBase]
Synedra pusilla Kützing 1844 [Link to DiatomBase]
Synedra radians Kützing 1844 [Link to DiatomBase]
Synedra recava Hohn 1961 [Link to DiatomBase]
Synedra regalis Taylor 1967 [Link to DiatomBase]
Synedra rennellensis Foged 1957 [Link to DiatomBase]
Synedra ridica Hohn & Hellerman 1966 [Link to DiatomBase]
Synedra rosenkrantzii Foged 1958 [Link to DiatomBase]
Synedra rumpens Kützing 1844 [Link to DiatomBase]
Synedra rumpens f. constricta Hustedt 1937 [Link to DiatomBase]
Synedra rumpens f. constricta Hustedt 1937 [Link to DiatomBase]
Synedra rumpens f. constricta Hustedt 1987 [Link to DiatomBase]
Synedra rumpens f. nipponica Skvortzow 1936 [Link to DiatomBase]
Synedra rumpens var. fusa Patrick 1941 [Link to DiatomBase]
Synedra rumpens var. neogena (Grunow) Hustedt 1937 [Link to DiatomBase]
Synedra rumpens var. nipponica Skvortzow 1936 [Link to DiatomBase]
Synedra rumpens var. okamurae Skvortzow 1937 [Link to DiatomBase]
Synedra rumpens var. robusta Manguin 1964 [Link to DiatomBase]
Synedra rumpens var. sinica Skvortzow 1935 [Link to DiatomBase]
Synedra scina Hohn & Hellerman 1966 [Link to DiatomBase]
Synedra sicula var. neogenica Zanon 1933 [Link to DiatomBase]
Synedra simbirskiana (Grunow & Pantocsek) Schrader 1969 [Link to DiatomBase]
Synedra socia Wallace 1960 [Link to DiatomBase]
Synedra stela Hohn & Hellermann 1963 [Link to DiatomBase]
Synedra strangulata Zanon 1938 [Link to DiatomBase]
Synedra subrhombica Nygaard 1954 [Link to DiatomBase]
Synedra szurdokpuespoekiensis Hajós 1968 [Link to DiatomBase]
Synedra tabulata f. angusta Thomas & Gonzalves 1965 [Link to DiatomBase]
Synedra tabulata f. densestriata M. Moller 1950 [Link to DiatomBase]
Synedra tabulata f. punctata Hajós 1973 [Link to DiatomBase]
Synedra tabulata var. affinis (Kützing) Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. australis Manguin 1960 [Link to DiatomBase]
Synedra tabulata var. dannfeltii Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. delicatula (Grunow) Ross 1947 [Link to DiatomBase]
Synedra tabulata var. elliptica Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. genuina Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. hybrida (Grunow in Van Heurck) Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. jeniseyensis Skvortzow 1971 [Link to DiatomBase]
Synedra tabulata var. lanceolata (Řstrup) Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. lanceolata (Řstrup) Cleve-Euler 1991 [Link to DiatomBase]
Synedra tabulata var. lata Giffen 1980 [Link to DiatomBase]
Synedra tabulata var. obtusa (Arnott) Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. obtusa (Arnott in Van Heurck) Ross 1947 [Link to DiatomBase]
Synedra tabulata var. ovalis Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. pantocsekii Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. rostrata (Juhlin-Dannfelt) Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. rupicola (Grunow in Van Heurck) Cleve-Euler 1953 [Link to DiatomBase]
Synedra tabulata var. tenuistriata Meister (1934)1935 [Link to DiatomBase]
Synedra tenera W. Smith 1856 [Link to DiatomBase]
Synedra tenera var. densestriata Tynni 1994 [Link to DiatomBase]
Synedra tenera var. genuina Cleve-Euler 1953 [Link to DiatomBase]
Synedra tenera var. hinganica Skvortzov 1976 [Link to DiatomBase]
Synedra tenera var. sinica Skvortzow 1935 [Link to DiatomBase]
Synedra tortuosa D.M. Williams & D. Metzeltin 2004 [Link to DiatomBase]
Synedra ulna f. acicularis (Meister) Woodhead & Tweed 1954 [Link to DiatomBase]
Synedra ulna f. amphirhynchus (Ehrenberg) Skabichevskii 1960 [Link to DiatomBase]
Synedra ulna f. biceps (Kützing) Hustedt 1957 [Link to DiatomBase]
Synedra ulna f. biceps (Kützing) Skabichevskii 1960 [Link to DiatomBase]
Synedra ulna f. biwensis Skvortzow & Noda 1971 [Link to DiatomBase]
Synedra ulna f. capitata (Ehrenberg) Skabichevskii 1960 [Link to DiatomBase]
Synedra ulna f. clavata A. Berg 1945 [Link to DiatomBase]
Synedra ulna f. communis Skvortzow ex Skvortzow 1971 [Link to DiatomBase]
Synedra ulna f. constricta Skvortzow 1938 [Link to DiatomBase]
Synedra ulna f. curta (Skvortzow) Skvortzow 1946 [Link to DiatomBase]
Synedra ulna f. danica (Kützing) Hustedt 1957 [Link to DiatomBase]
Synedra ulna f. impressa (Hustedt in Schmidt et al.) Hustedt 1957 [Link to DiatomBase]
Synedra ulna f. inflata Maillard 1961 [Link to DiatomBase]
Synedra ulna f. joursacensis (Heribaud) Cleve-Euler 1953 [Link to DiatomBase]
Synedra ulna f. pantocsekii Cleve-Euler 1953 [Link to DiatomBase]
Synedra ulna f. rostrata (Pantocsek) Cleve-Euler 1953 [Link to DiatomBase]
Synedra ulna f. spatulifera (Grunow) Skabichevskii 1960 [Link to DiatomBase]
Synedra ulna f. typica Cleve-Euler 1953 [Link to DiatomBase]
Synedra ulna var. abiskoensis Foged 1953 [Link to DiatomBase]
Synedra ulna var. acutissima Skvortzow 1971 [Link to DiatomBase]
Synedra ulna var. andina Manguin 1964 [Link to DiatomBase]
Synedra ulna var. balatonis (Pantocsek) Cleve-Euler 1953
Synedra ulna var. claviceps Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. claviceps Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. claviceps Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. constricta Venkataraman 1939 [Link to DiatomBase]
Synedra ulna var. crassa Venkataraman 1957 [Link to DiatomBase]
Synedra ulna var. fonticola Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. fonticola Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. fonticola Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. impressa Hustedt in Schmidt et al. 1921 [Link to DiatomBase]
Synedra ulna var. jeniseyensis Skvortzow 1971 [Link to DiatomBase]
Synedra ulna var. joursacensis (Heribaud) Mayer 1940 [Link to DiatomBase]
Synedra ulna var. longirostris (Grunow in Van Heurck) Cleve-Euler 1948 [Link to DiatomBase]
Synedra ulna var. minima Musafarov 1952 [Link to DiatomBase]
Synedra ulna var. platycephala Manguin 1964 [Link to DiatomBase]
Synedra ulna var. recta (Kützing) Ross 1947
Synedra ulna var. repanda Q.X. Wang & Q. You in Q. You et al. 2008 [Link to DiatomBase]
Synedra ulna var. siamense Hirano 1967 [Link to DiatomBase]
Synedra ulna var. subaequalis Skvortzow 1971 [Link to DiatomBase]
Synedra ulna var. subaequalis Skvortzov 1975 [Link to DiatomBase]
Synedra ulna var. tenuirostris Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. tenuirostris Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. tenuirostris Hustedt 1937 [Link to DiatomBase]
Synedra ulna var. tenuirostris Skvortzow 1938 [Link to DiatomBase]
Synedra ulna subsp. aequalis (Kützing) Skabichevskii 1960
Synedra ulna subsp. danica (Kützing) Skabichevskii 1959 [Link to DiatomBase]
Synedra ulna subsp. danica (Kützing) Skabichevskii 1959 [Link to DiatomBase]
Synedra undulata f. rigida Zanon 1941 [Link to DiatomBase]
Synedra undulata var. curvata Heiden & Kolbe 1928 [Link to DiatomBase]
Synedra ungeriana (Grunow) D. M. Williams 1986 [Link to DiatomBase]
Synedra utermoehlii (utermohlii) Hustedt 1932 [Link to DiatomBase]
Synedra vaucheriae f. decipiens Weinhold 1957 [Link to DiatomBase]
Synedra vaucheriae var. capitata Skvortzow 1938 [Link to DiatomBase]
Synedra vaucheriae var. inflata Manguin in Bourrelly & Manguin 1952 [Link to DiatomBase]
Synedra vaucheriae var. jeniseyensis Skvortzow 1971 [Link to DiatomBase]
Synedra vaucheriae var. septentrionalis Řstrup 1910 [Link to DiatomBase]
Synedra vaucheriae var. sigmoidea Skvortzow 1936 [Link to DiatomBase]
) include cards of species and infraspecific taxa. No symbol next to a taxon name = no cards are present in the NSF (mostly a taxon described prior to 1933).