PENNATE DIATOMS WITHOUT RAPHES - Fragilariophyceae
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Names in bold italic print are current names for taxa reported from the central United States.
Names in standard italic print are synonyms reported in the references cited with them.

For example, Ctenophora pulchella (Ralfs ex Kütz.) Will. & Round was reported under that name from Kansas by Harris and Eberle (2001), and it was reported under the synonym Synedra pulchella Ralfs ex Kütz. and its forms and varieties in several references, which are listed under the entries for those names in this list.

The entry for Ceratoneis arcus (Ehr.) Kütz. indicates that this name (reported from Kansas by  WPSS, 1961-1963) is a synonym of Hannaea arcus (Ehr.) Patr., which is included elsehwere in this list.

The names of the states are abbreviated with their postal codes: CO = Colorado, KS = Kansas, MO = Missouri, NE = Nebraska, OK = Oklahoma.
Amphicampa mirabilis Ehr. ex Ralfs
    NE: Patrick & Reimer (1966)
Asterionella formosa Hass.
    KS: Powers (1969), Reinke (1979a), Williams et al. (1979), WPSS (1961-1963)
    MO: M.K. Morris et al. (1979a), Pamperl (1980), Williams (1962), WPSS (1961-1963, 1966)
    NE: Hoagland et al. (1982), F.A. Morris et al. (1979), Roemer et al. (1984), Williams (1962, 1964, 1972),
          WPSS (1961-1963, 1966)
    OK: Hern et al. (1979), Pfiester et al. (1979), Wilhm et al. (1977), Wilhm et al. (1978)
    Plains States: Patrick & Reimer (1966)
Asterionella formosa var. gracillima (Hantz.) Grun.
    KS: Williams et al. (1979)

Catacombas gaillonii (Bory) Will. & Round
        Synonyms:
            Synedra gaillonii (Bory) Ehr.
Ceratoneis arcus (Ehr.) Kütz. = Hannaea arcus (Ehr.) Patr.
    KS: WPSS (1961-1963)
Ctenophora pulchella (Ralfs ex Kütz.) Will. & Round
    KS: Harris & Eberle (2001)
        Synonyms:
            Synedra pulchella Ralfs ex Kütz.
            Synedra pulchella f. major Grun.
            Synedra pulchella var. smithii (Ralfs) Grun.
Ctenophora pulchella var. lacerata (Hust.) comb. nov.?
        Synonyms:
            Synedra pulchella var. lacerata Hust.
Ctenophora pulchella var. lanceolata (O’Meara) comb. nov.?
        Synonyms:
            Synedra pulchella var. lanceolata O’Meara

Diatoma elongatum (Lyngb.) Ag. = Diatoma tenue Ag.
    NE: F.A. Morris et al. (1979), Williams (1962), WPSS (1961-1963, 1966)
Diatoma hiemale (Roth) Heib.
    KS: Reinke (1979a)
    OK: Wilhm et al. (1977)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Odontidium hiemale (Roth) Kütz.
Diatoma tenue Ag.
    KS: Curtis (1901), Patrick & Reimer (1966)
    OK: Troeger (1983)
        Synonyms:
            Diatoma elongatum (Lyngb.) Ag.
            Diatoma tenue var. elongatum Lyngb.
Diatoma tenue var. elongatum Lyngb. = Diatoma tenue Ag.
    CO: M.K. Morris et al. (1979b)
    Plains States: Patrick & Reimer (1966)
Diatoma vulgare Bory
    CO: WPSS (1961-1963)
    KS: Branson (1966), Harris & Eberle (2001), Powers (1969), Reinke (1979a, 1985), Wenke & Eberle (1986),
          Williams et al. (1979), Wujek et al. (1980)
    MO: Pamperl (1980), WPSS (1961-1963)
    NE: Hoagland et al. (1982), F.A. Morris et al. (1979), Roemer et al. (1984), Williams (1962, 1964, 1972),
          Williams & Scott (1962), WPSS (1961-1963, 1966)
    OK: Hern et al. (1979), Koch & Risser (1974), Pfiester et al. (1979), Seyfer & Wilhm (1977), Wilhm et al.
          (1977), Wilhm et al. (1978), WPSS (1961-1963)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Odontidium vulgare (Bory) Elm.
            Diatoma vulgare var. breve Grun.
            Tetracyclus rupestris (Braun ex Rab.) Grun.
Diatoma vulgare var. breve Grun. = Diatoma vulgare Bory
    Plains States: Patrick & Reimer (1966)

Fragilaria brevistriata Grun. = Pseudostaurosira brevistriata (Grun.) Will. & Round
    KS: Wenke & Eberle (1986), Wujek (1965)
    Plains States: Patrick & Reimer (1966)
Fragilaria brevistriata var. inflata (Pant.) Hust. = Pseudostaurosira brevistriata var. inflata
    (Pant.) Edlund
    KS: Wenke & Eberle (1986), Wujek et al. (1980)
    NE: Hoagland et al. (1982), Patrick & Reimer (1966)
Fragilaria capucina Desm.
    KS: Williams (1962), WPSS (1961-1963, 1966), Wujek et al. (1980)
    MO: Williams (1962), WPSS (1961-1963, 1966)
    NE: Andersen & Walker (1920), Elmore (1921), F.A. Morris et al. (1979), Williams (1962), WPSS 
          (1961-1963, 1966)
    OK: Koch & Risser (1974), Pfiester et al. (1979), Wilhm et al. (1977)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Fragilaria diophthalma (Ehr.) Ehr.
            Fragilaria rhabdosoma Ehr.
            Synedra rumpens Kütz.
Fragilaria capucina var. mesolepta Rab.
    KS: Wujek et al. (1980)
    MO: Pamperl (1980)
    NE: Hoagland et al. (1982)
    OK: Koch & Risser (1974), Troeger & Menzel (1986)
    Plains States: Patrick & Reimer (1966)
Fragilaria construens (Ehr.) Grun. = Staurosira construens Ehr.
    CO: WPSS (1961-1963)
    KS: Williams (1962, 1964), Williams & Scott (1962), WPSS (1961-1963, 1966)
    MO: Pamperl (1980), Williams (1962, 1964), Williams & Scott (1962), WPSS (1961-1963, 1966)
    NE: Andersen & Walker (1920), Elmore (1921), ?F.A. Morris et al. (1979), Williams (1964, 1972), 
          WPSS (1961-1963)
    OK: Wilhm et al. (1977), WPSS (1961-1963)
    Plains States: Patrick & Reimer (1966)
Fragilaria construens var. binodis (Ehr.) Grun. = Staurosira construens var. binodis (Ehr.) Ham.
    KS: Wujek et al. (1980)
    NE: Andersen & Walker (1920), Patrick & Reimer (1966)
Fragilaria construens var. venter (Ehr.) Grun. = Staurosira construens var. venter (Ehr.) Ham.
    KS: Wenke & Eberle (1986), Wujek et al. (1980)
    MO: Pamperl (1980)
Fragilaria crotonensis Kitton
    CO: M.K. Morris et al. (1979b)
    KS: Williams (1962), Williams et al. (1979), WPSS (1961-1963, 1966), Wujek et al. (1980)
    MO: M.K. Morris et al. (1979a), Pamperl (1980), Williams (1962), WPSS (1961-1963, 1966)
    NE: F.A. Morris et al. (1979), Williams (1962, 1964), WPSS (1961-1963, 1966)
    OK: Cooper & Wilhm (1975), Hern et al. (1979), Wilhm et al. (1977), Wilhm et al. (1978), 
           WPSS (1961-1963)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Synedra crotonensis (Kitton) Cl. & Möll.
Fragilaria diophthalma (Ehr.) Ehr. = Fragilaria capucina Desm.
    NE: Ehrenberg (1856)
    OK: Ehrenberg (1856)
Fragilaria elliptica f. minor Grun. = Staurosira elliptica (Schum.) Will. & Round [f. minor 
    comb. nov.?]
    KS: Curtis (1901)
Fragilaria fragilarioides (Grun.) Choln.?
        Synonyms:
            Synedra rumpens var. fragilarioides Grun.
Fragilaria harrisonii (W. Sm.) Grun. = Staurosirella leptostauron (Ehr.) Will. & Round
    NE: Elmore (1921), Webber (1889, 1890)
Fragilaria incisa (Boyer) L.-Bert.
        Synonyms:
            Synedra incisa Boyer
Fragilaria intermedia Grun. = Fragilaria vaucheriae (Kütz.) Peters.
    KS: Curtis (1901), Powers (1969), Williams et al. (1979)
    NE: ?F.A. Morris et al. (1979)
Fragilaria lapponica Grun. = Staurosirella lapponica (Grun.) Will. & Round
    OK: Patrick & Reimer (1966)
Fragilaria leptostauron (Ehr.) Hust. = Staurosirella leptostauron (Ehr.) Will. & Round
    NE: F.A. Morris et al. (1979)
    OK: Koch & Risser (1974), Wilhm et al. (1977)
    Plains States: Patrick & Reimer (1966)
Fragilaria minuscula (Grun.) Will. & Round
        Synonyms:
            Synedra minuscula Grun.
Fragilaria mutabilis (W. Sm.) Grun. = Staurosirella pinnata (Ehr.) Will. & Round (misidentified 
      Punctastriata?)
    KS: Curtis (1901)
    NE:Andersen & Walker (1920), Elmore (1921)
Fragilaria pinnata Ehr. = Staurosirella pinnata (Ehr.) Will. & Round (misidentified Punctastriata?)
    KS: WPSS (1961-1963), Wujek (1965)
    MO: Pamperl (1980), WPSS (1961-1963)
    NE: Ehrenberg (1856), Roemer et al. (1984), WPSS (1961-1963)
    OK: Ehrenberg (1856), Pfiester et al. (1979), Wilhm et al. (1977), WPSS (1961-1963)
    Plains States: Patrick & Reimer (1966)
Fragilaria pinnata var. intercedens (Grun.) Hust. = Staurosirella pinnata var. intercedens (Grun.)
    comb. nov.?
    OK: Pfiester et al. (1979)
    Plains States: Patrick & Reimer (1966)
Fragilaria radians (Kütz.) Will. & Round
        Synonyms:
            Synedra acus var. radians (Kütz.) Hust.
            Synedra radians Kütz.
Fragilaria rhabdosoma Ehr. = Fragilaria capucina Ehr.
    NE: Ehrenberg (1856)
    OK: Ehrenberg (1856)
Fragilaria rostrata Ehr.
    OK: ?Ehrenberg (1856)
Fragilaria tenera (W. Sm.) L.-Bert.
        Synonyms:
            Synedra tenera W. Sm.
Fragilaria turgens Ehr.
    KS: Curtis (1901)
Fragilaria vaucheriae (Kütz.) Peters.
    KS: Harris & Eberle (2001), Powers (1969), Wenke & Eberle (1986), Wujek et al. (1980)
    MO: Pamperl (1980)
    NE: Hoagland et al. (1982), Roemer et al. (1984), Rosowski et al. (1986)
    OK: Pfiester et al. (1979)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Fragilaria intermedia (Kütz.) Peters.
            Synedra vaucheriae (Kütz.) Kütz.
Fragilaria vaucheriae var. capitellata (Grun.) Patr.
        Synonyms:
            Synedra vaucheriae var. capitellata (Grun.) Cl.
Fragilaria virescens Ralfs = Fragilariforma virescens (Ralfs) Will. & Round
    KS: Wujek (1965)
    NE: Elmore (1921)
    OK: Pfiester et al. (1979)
    Plains States: Patrick & Reimer (1966)
Fragilaria virescens var. mesolepta (Rab.) Schönf. = Fragilariforma virescens var. mesolepta 
    (Rab.) And., Stoerm., & Kreis
    KS: Wujek (1965)
Fragilariforma virescens (Ralfs) Will. & Round
        Synonyms:
            Fragilaria virescens Ralfs
Fragilariforma virescens var. mesolepta (Rab.) And., Stoerm., & Kreis
        Synonyms:
            Fragilaria virescens var. mesolepta (Rab.) Schönf.

Hannaea arcus (Ehr.) Patr.
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Ceratoneis arcus (Ehr.) Kütz.

Meridion circulare (Grev.) Ag.
    KS: Curtis (1901), Powers (1969), Wenke & Eberle (1986), Wolle (1889)
    NE: Elmore (1921), Rosowski et al. (1986), Webber (1890)
    OK: Koch & Risser (1974), Pfiester et al. (1979), Seyfer & Wilhm (1977), Wilhm et al. (1977), 
           Wilhm et al. (1978)
    Plains States: Patrick & Reimer (1966)
Meridion circulare var. constrictum (Ralfs) V.H. = Meridion constrictum Ralfs
    OK: Pfiester et al. (1979)
Meridion constrictum Ralfs
        Synonyms:
            Meridion circulare var. constrictum (Ralfs.) V.H.

Odontidium hiemale (Roth) Kütz. = Diatoma hiemale (Roth) Heib.
    NE: Elmore (1921)
Odontidium vulgare (Bory) Elm. = Diatoma vulgare Bory
    NE: Elmore (1921)
Opephora martyi Hérib. = Martyana martyi (Hérib.) Round
    KS: WPSS (1961-1963), Wujek et al. (1980)
    MO: WPSS (1961-1963)
    NE: WPSS (1961-1963)
    OK: Wilhm et al. (1977), Wilhm et al. (1978), WPSS (1961-1963)
    Plains States: Patrick & Reimer (1966)

Pseudostaurosira brevistriata (Grun.) Will. & Round
        Synonyms:
            Fragilaria brevistriata Grun.
Pseudostaurosira brevistriata var. inflata (Pant.) Edlund
        Synonyms:
            Fragilaria brevistriata var. inflata (Pant.) Hust.

Sceptroneis pacifica (Grun.) Elm. sensu Elmore (1921) = Martyana martyi (Hérib.) Round
    NE: Andersen & Walker (1920), Elmore (1921)
Sceptroneis fibula (Bréb.) Elm. = Peronia fibula (Bréb. ex Kütz.) Ross
    NE: Andersen & Walker (1920), Elmore (1921)
Staurosira construens Ehr.
    NE: Ehrenberg (1856)
        Synonyms:
            Fragilaria construens (Ehr.) Grun.
Staurosira construens var. binodis (Ehr.) Ham.
        Synonyms:
            Fragilaria construens var. binodis (Ehr.) Grun.
Staurosira construens var. venter (Ehr.) Ham.
    KS: Harris & Eberle (2001)
        Synonyms:
            Fragilaria construens var. venter (Ehr.) Grun.
Staurosirella dubia (Grun.) Morales
    NE: Morales & Manoylov (2006)
Staurosira elliptica (Schum.) Will. & Round [f. minor (Grun.) comb. nov?]
        Synonyms:
            Fragilaria elliptica f. minor Grun.
Staurosirella lapponica (Grun.) Will. & Round
        Synonyms:
            Fragilaria lapponica Grun.
Staurosirella leptostauron (Ehr.) Will. & Round
    NE: Morales & Manoylov (2006)
        Synonyms:
            Fragilaria harrisonii (W. Sm.) Grun.
            Fragilaria leptostauron (Ehr.) Hust.
Staurosirella martyi (Hérib.) Morales
    NE: Morales & Manoylov (2006)
        Synonyms:
            Opephora martyi Hérib.
            Sceptroneis pacifica (Grun.) Elm.
Staurosirella pinnata (Ehr.) Will. & Round
        Synonyms:
            Fragilaria mutabilis (W. Sm.) Grun.
            Fragilaria pinnata Ehr.
Staurosirella pinnata var. intercedens (Grun.) comb. nov.?
        Synonyms:
            Fragilaria pinnata var. intercedens Grun.
Staurosirella subcapitata (Freng.) Morales
    NE: Morales & Manoylov (2006)
Striatella fenestrata (Lyngb.) Kuntze = Tabellaria fenestrata (Lyngb.) Kütz.
    NE: Elmore (1921)
Striatella flocculosa (Roth) Kuntze = Tabellaria flocculosa (Roth) Kütz.
    NE: Elmore (1921)
Synedra acus Kütz.
    KS: Curtis (1901), Williams et al. (1979), Wujek et al. (1980)
    MO: Pamperl (1980)
    NE: Hoagland et al. (1982), F.A. Morris et al. (1979), Roemer et al. (1984), Webber (1890)
    OK: Hern et al. (1979), Pfiester et al. (1979), WPSS (1961-1963)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Synedra tenuissima Kütz.
Synedra acus var. angustissima (Grun.) V.H. = Synedra delicatissima var. angustissima Grun. 
    = Fragilaria?
    OK: Troeger (1978, 1983)
Synedra acus var. radians (Kütz.) Hust. = Fragilaria radians (Kütz.) Will. & Round
    MO: Pamperl (1980)
Synedra acuta Ehr.
    OK: Ehrenberg (1856)
Synedra amphicephala Kütz.
    NE: Elmore (1921)
    Plains States: Patrick & Reimer (1966)
Synedra capitata Ehr.
    KS: Czarnecki & Reinke (1981)
    NE: Elmore (1921)
    Plains States: Patrick & Reimer (1966)
Synedra crotonensis (Kitton) Cl. & Moll. = Fragilaria crotonensis Kitton
    KS: Curtis (1901)
Synedra cyclopum Brutschy
    OK: Kennedy & Pfiester (1984)
Synedra danica Kütz. = Synedra ulna var. danica (Kütz.) V.H.
    KS: Curtis (1901)
Synedra delicatissima W. Sm.
    KS: ?Harris & Eberle (2001), Wujek et al. (1980)
    MO: M.K. Morris et al. (1979a), Pamperl (1980)
    OK: Hern et al. (1979)
Synedra delicatissima var. angustissima Grun. = Fragilaria [if striae are alternate (Round 1991)]?
    MO: M.K. Morris et al. (1979a), Pamperl (1980)
    OK: Hern et al. (1979), Troeger & Menzel (1986)
    Plains States: Patrick & Reimer (1966)
Synedra entomon Ehr. = Nitzschia entomon (Ehr.) Ralfs
    OK: Ehrenberg (1856)
Synedra familiaris Kütz. = Synedra rumpens var. familiaris(Kütz.) Hust. = Tabularia familiaris 
    (Kütz.) comb. nov.?
    KS: Curtis (1901)
    NE: Elmore (1921)
Synedra fasciculata (Ag.) Kütz. = Tabularia fasciculata (Ag.) Will. & Round
    KS: Wenke & Eberle (1986), Wujek et al. (1980)
    OK: Koch (1975), Koch & Risser (1974), Pfiester et al. (1979), Seyfer & Wilhm (1977)
    Plains States: Patrick & Reimer (1966)
Synedra fasciculata var. truncata (Grev.) Patr. = Tabularia fasciculata (Ag.) Will. & Round
    KS: Wujek et al. (1980)
    MO: Pamperl (1980)
Synedra filiformis var. exilis Cl.-Eul.
    NE: Roemer et al. (1984)
    OK: Troeger (1983)
Synedra flexuosa = ?
    OK: Ehrenberg (1856)
Synedra gaillonii (Bory) Ehrenb. = Catacombas gaillonii (Bory) Will. & Round
    KS: Czarnecki & Reinke (1981)
    OK: Kennedy & Pfiester (1984)
Synedra goulardi Bréb.
    KS: Wenke & Eberle (1985)
    MO: Pamperl (1980)
    OK: Pfiester et al. (1979)
Synedra incisa Boyer = Fragilaria incisa (Boyer) L.-Bert.
    NE: Patrick & Reimer (1966)
Synedra lanceolata Kütz. = Synedra ulna (Nitz.) Ehrenb.
    KS: Curtis (1901)
Synedra minuscula Grun. = Fragilaria minuscula (Grun.) Will. & Round
    KS: Williams et al. (1979)
    MO: Pamperl (1980)
    OK: Koch (1975), Pfiester et al. (1979)
Synedra nana Meist.
    OK: WPSS (1961-1963)
Synedra parasitica (W. Sm.) Hust.
    KS: Wujek et al. (1980)
    MO: Pamperl (1980)
    OK: Koch & Risser (1974)
    Plains States: Patrick & Reimer (1966)
Synedra parasitica var. subconstricta (Grun.) Hust.
    KS: Wujek et al. (1980)
    OK: Koch & Risser (1974)
Synedra pulchella Ralfs ex Kütz. = Ctenophora pulchella (Ralfs ex Kütz.) Will. & Round
    KS: Curtis (1901), Wenke & Eberle (1986)
    NE: Elmore (1921), Hoagland et al. (1982)
    Plains States: Patrick & Reimer (1966)
Synedra pulchella f. major Grun. = Ctenophora pulchella (Ralfs ex Kütz.) Will. & Round
    KS: Curtis (1901)
Synedra pulchella var. lacerata Hust. = Ctenophora pulchella var. lacerata (Hust.) comb. nov.?
    NE: Hoagland et al. (1982), Patrick & Reimer (1966)
Synedra pulchella var. lanceolata O'Meara = Ctenophora pulchella var. lanceolata (O’Meara) 
    comb. nov.?
    KS: Czarnecki & Reinke (1981) [see Eberle (1982:131)]
    NE: Patrick & Reimer (1966)
Synedra pulchella var. smithii (Ralfs) Grun. = Ctenophora pulchella (Ralfs ex Kütz.) Will. & Round
    NE: Webber (1890) [and parenthetically as Synedra acicularis W. Sm.]
Synedra radians Kütz. = Fragilaria radians (Kütz.) Will. & Round
    MO: Pamperl (1980)
    NE: Elmore (1921), Hoagland et al. (1982), Roemer et al. (1984)
    OK: Pfiester et al. (1979), Troeger (1978)
    Plains States: Patrick & Reimer (1966)
Synedra rumpens Kütz. = Fragilaria capucina Desm.
    KS: Williams et al. (1979)
    MO: Pamperl (1980)
    NE: Andersen & Walker (1920), F.A. Morris et al. (1979)
    OK: Pfiester et al. (1979), Seyfer & Wilhm (1977), Troeger (1978, 1983), Wilhm et al. (1977), 
           Wilhm et al. (1978)
    Plains States: Patrick & Reimer (1966)
Synedra rumpens var. familiaris (Kütz.) Hust. = Tabularia familiaris (Kütz.) comb. nov.?
    KS: Wenke & Eberle (1985)
    MO: Pamperl (1980)
    OK: Troeger (1978)
    Plains States: Patrick & Reimer (1966)
Synedra rumpens var. fragilarioides Grun. = Fragilaria fragilarioides (Grun.) Choln.?
    MO: Pamperl (1980)
    NE: Patrick & Reimer (1966)
    OK: Troeger (1978)
Synedra rumpens var. meneghiniana Grun. = ?
    OK: Troeger (1978)
Synedra spectabilis Ehr. = Hantzschia spectabilis (Ehr.) Hust.
    NE: Ehrenberg (1856)
Synedra splendens Kütz. = Synedra ulna (Nitz.) Ehr.
    KS: Branson (1966)
Synedra superba Kütz.
    KS: Curtis (1901)
Synedra tabulata (Ag.) Kütz. = Tabularia tabulata (Ag.) Snoeijs
    NE: Elmore (1921)
    OK: Wilhm et al. (1977)
Synedra tenera W. Sm. = Fragilaria tenera (W. Sm.) L.-Bert.
    OK: Troeger (1978, 1983)
Synedra tenuissima Kütz. = Synedra acus Kütz.
    NE: Elmore (1921)
Synedra ulna (Nitz.) Ehr.
    CO: Williams (1964), WPSS (1961-1963)
    KS: Curtis (1901), Harris & Eberle (2001), McFarland et al. (1964), Powers (1969), Reinke (1985), 
          Wenke & Eberle (1986), Williams (1962, 1964, 1972), Williams & Scott (1962), Williams et al. (1979), 
          Wolle (1889), WPSS (1961-1963, 1966), Wujek et al. (1980)
    MO: Pamperl (1980), Williams (1962), Williams (1964), WPSS (1961-1963), WPSS (1966)
    NE: Andersen & Walker (1920), Elmore (1921), F.A. Morris et al. (1979), Roemer et al. (1984), 
          Rosowski et al. (1986), Webber (1889, 1890), Williams (1964), WPSS (1961-1963)
    OK: Cooper & Wilhm (1975), Ehrenberg (1856), Hern et al. (1979), Koch (1975), Koch & Risser (1974),
          Leake (1945), Pfiester et al. (1979), Seyfer & Wilhm (1977), Troeger (1978), Troeger & Menzel (1986), 
          Wilhm et al. (1977), Wilhm et al. (1978), Williams (1962, 1964, 1972), Willson & Forest (1957), 
          WPSS (1961-1963, 1966)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Synedra lanceolata Kütz.
            Synedra splendens Kütz.
            Synedra ulna var. splendens (Kütz.) V.H.
Synedra ulna var. aequalis (Kütz.) Brun
    OK: Pfiester et al. (1979)
Synedra ulna var. amphirhynchus (Ehr.) Grun.
    OK: Pfiester et al. (1979)
        Synonyms:
            Synedra ulna var. vitrea (Bory ex Kütz.) V.H.
Synedra ulna var. biceps (Kütz.) Kirchn.
        Synonyms:
            Synedra ulna var. longissima (W. Sm.) Brun
Synedra ulna var. chaseana Thomas
    OK: Pfiester et al. (1979)
Synedra ulna var. contracta Østr.
    OK: Pfiester et al. (1979)
Synedra ulna var. danica (Kütz.) V.H.
    KS: Harris & Eberle (2001), Wujek (1965)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Synedra danica Kütz.
Synedra ulna var. longissima (W. Sm.) Brun = Synedra ulna var. biceps (Kütz.) Kirchn.
    KS: Curtis (1901)
    Plains States: Patrick & Reimer (1966)
Synedra ulna var. ramesi (Herib.) Hust.
    MO: Pamperl (1980)
    Plains States: Patrick & Reimer (1966)
Synedra ulna var. spathulifera Hust.
    KS: Wujek et al. (1980)
Synedra ulna var. splendens (Kütz.) V.H. = Synedra ulna (Nitz.) Ehr.
    NE: Webber (1890)
Synedra ulna var. subaequalis (Grun.) V.H.
    Plains States: Patrick & Reimer (1966)
Synedra ulna var. vitrea (Bory ex Kütz.) V.H. = Synedra ulna var. amphirhynchus (Ehr.) Grun.
    KS: Curtis (1901)
Synedra vaucheriae (Kütz.) Kütz. = Fragilaria vaucheriae (Kütz.) Peters.
    OK:Williams (1962), WPSS (1961-1963, 1966)
Synedra vaucheriae var. capitellata (Grun.) Cl. = Fragilaria vaucheriae var. capitellata (Grun.) Patr.
    OK: Pfiester & Terry (1978)

Tabellaria fenestrata (Lyngb.) Kütz.
    KS: Reinke (1982a)
    OK: Hern et al. (1979), WPSS (1961-1963)
        Synonyms:
            Striatella fenestrata (Lyngb.) Kuntze
Tabellaria flocculosa (Roth) Kütz.
    OK: Pfiester et al. (1979)
    Plains States: Patrick & Reimer (1966)
        Synonyms:
            Striatella flocculosa (Roth) Kuntze
Tabularia familiaris (Kütz.) comb. nov.?
        Synonyms:
            Synedra familiaris Kütz.
            Synedra rumpens var. familiaris (Kütz.) Hust.
Tabularia fasciculata (Ag.) Will. & Round
    KS: Harris & Eberle (2001)
        Synonyms:
            Synedra fasciculata (Ag.) Kütz.
            Synedra fasciculata var. truncata (Grev.) Patr.
Tabularia tabulata (Ag.) Snoeijs
    KS: Harris & Eberle (2001)
        Synonyms:
            Synedra tabulata (Ag.) Kütz.
Tetracyclus lacustris Ralfs
    NE:Andersen & Walker (1920), Elmore (1921), Patrick & Reimer (1966)
Tetracyclus rupestris (Braun ex Rab.) Grun. = misidentification? (Diatoma vulgare Bory?)
    NE:Elmore (1921)

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