CENTRIC DIATOMS - Coscinodiscophyceae
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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, Aulacoseira ambigua (Grun.) Simons. was reported under that name from Nebraska by Roemer et al. (1984), and it was reported under the synonym Melosira ambigua (Grun.) O. Müll. in several references, which are listed under the entry for that name in this list.

The entry for Attheya zachariasii Brun indicates that this name (reported from Oklahoma by Hern et al., 1979) is a synonym of Acanthoceras zachariasii (Brun) Simons., which is included elsewhere in this list.

The names of the states are abbreviated with their postal codes: CO = Colorado, KS = Kansas, MO = Missouri, NE = Nebraska, OK = Oklahoma.

Acanthoceras zachariasii (Brun) Simons.
        Synonyms:
            Attheya zachariasii Brun
Actinocyclus normanii f. subsalsa (Juhl.-Dannf.) Hust.
        Synonyms:
            Coscinodiscus rothii var. subsalsa (Juhl.-Dannf.) Hust.
Attheya zachariasii Brun = Acanthoceras zachariasii (Brun) Simons.
    OK: Hern et al. (1979)
Aulacoseira ambigua (Grun.) Simons.
    NE: Roemer et al. (1984)
        Synonyms:
            Melosira ambigua (Grun.) O. Müll.
Aulacoseira distans (Ehr.) Simons.
        Synonyms:
            Gallionella distans Ehr.
            Gallionella laevis Ehr.
            Lysigonium distans (Ehr.) Kuntze
            Melosira distans (Ehr.) Kütz.
Aulacoseira distans var. alpigena (Grun.) Simons.
        Synonyms:
            Melosira distans. var. alpigena Grun.
Aulacoseira distans var. lirata f. lacustris (Grun.) Simons.
        Synonyms:
            Melosira distans var. lirata f. lacustris (Grun.) Bethage
Aulacoseira granulata (Ehr.) Simons.
        Synonyms:
            Lysigonium granulatum (Ehr.) Kuntze
            Melosira granulata (Ehr.) Ralfs
Aulacoseira granulata var. angustissima (O. Müll.) Simons.
        Synonyms:
            Melosira granulata var. angustissima O. Müll.
Aulacoseira granulata var. angustissima f. curvata (Grun.) comb. nov.?
        Synonyms:
            Melosira granulata var. angustissima f. curvata Grun.
Aulacoseira granulata var. angustissima f. spiralis (Hust.) Czarn. & Reinke
    KS: Czarnecki & Reinke (1982)
        Synonyms:
            Melosira granulata var. angustissima f. spiralis Hust.
Aulacoseira italica (Ehr.) Simons.
        Synonyms:
            Gallionella crenata Ehr.
            Lysigonium crenulatum (Ehr.) Kuntze
            Melosira crenulata (Ehr.) Kütz.
            Melosira italica (Ehr.) Kütz.
Aulacoseira italica var. tenuissima (Grun.) Simons.
        Synonyms:
            Melosira italica var. tenuissima (Grun.) O. Müll.

Biddulphia laevis Ehr. = Pleurosira laevis (Ehr.) Compère
    CO: WPSS (1961-1963)
    KS: Boyer (1927a), Powers (1969), Reinke (1979a, 1982b), Wenke & Eberle (1986), Williams (1962), 
          Wolle (1894), WPSS (1961-1963, 1966)
    NE: Elmore (1921), Webber (1890), Wolle (1894)
    OK: Koch (1975), Pfiester & Terry (1978), Wilhm et al. (1977)

Chaetoceros muelleri Lemm.
    KS: Harris & Eberle (2001), Reinke (1984, 1985)
Coscinodiscus lacustris Grun.
    NE: Elmore (1921)
    OK: Wilhm et al. (1977)
Coscinodiscus rothii (Ehr.) Grun.
    KS: Wujek et al. (1980)
    OK: Williams (1962), WPSS (1961-1963, 1966)
Coscinodiscus rothii var. subsalsa (Juhl.-Dannf.) Hust. = Actinocyclus normanii f. subsalsa
    (Juhl.-Dannf.) Hust.
    OK: Koch (1975)
Cyclostephanos dubius (Fricke) Round
        Synonyms:
            Stephanodiscus dubius (Fricke) Hust.
Cyclostephanos invisitatus (Hohn & Hellerm.) Ther., Stoerm., & Håk.
        Synonyms:
            Stephanodiscus invisitatus (Fricke) Hust.
Cyclotella antigua W. Sm.
    NE: Elmore (1921)
    OK: Leake (1945)
Cyclotella atomus Hust.
    CO: WPSS (1961-1963)
    KS: Powers (1969), WPSS (1961-1963)
    MO: WPSS (1961-1963)
    NE: Roemer et al. (1984)
    OK: Pfiester et al. (1979), Seyfer & Wilhm (1977), Wilhm et al. (1977), Wilhm et al. (1978), Williams (1962),
           WPSS (1961-1963, 1966)
Cyclotella catenata (Brun) Bachm.
    OK: Troeger & Menzel (1986)
Cyclotella comta (Ehr.) Kütz. = Cyclotella radiosa (Grun.) Lemm. [see Håkansson (1986)]
    KS: Curtis (1901), Wujek et al. (1980)
    NE: Elmore (1921)
    OK: Pfiester et al. (1979)
Cyclotella distinguenda Hust.
        Synonyms:
            Cyclotella operculata (Ag.) Kütz.
Cyclotella glomerata Bachm. = Cyclotella stelligera var. glomerata (Bachm.) Haw. & Hurley
    KS: Powers (1969)
Cyclotella krammeri Håk. [see Håkansson (1990) and Teubner (1995)]
        Synonyms:
            Cyclotella kuetzingiana Thw.
            Cyclotella kuetzingiana var. planetophora Fricke
            Cyclotella kuetzingiana var. radiosa Fricke
Cyclotella kuetzingiana Thw. = Cyclotella krammeri Håk.
    KS: Powers (1969)
    OK: WPSS (1961-1963)
Cyclotella kuetzingiana var. planetophora Fricke = Cyclotella krammeri Håk. [see Håkansson (1990) 
      and Teubner (1995)]
    OK: Troeger (1978)
Cyclotella kuetzingiana var. radiosa Fricke = Cyclotella krammeri Håk. [see Håkansson (1990) and 
      Teubner (1995)]
    MO: Pamperl (1980)
Cyclotella meneghiniana Kütz.
    CO: M.K. Morris et al. (1979b), WPSS (1961-1963)
    KS: Curtis (1901), Harris & Eberle (2001), Powers (1969), Wenke & Eberle (1986), Williams (1962, 1964),
          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: Andersen & Walker (1920), Elmore (1921), Hoagland et al. (1982), F.A. Morris et al. (1979), 
          Roemer et al. (1984), Williams (1962, 1964), Williams & Scott (1962), WPSS (1961-1963, 1966)
    OK: Cooper & Wilhm (1975), Hern et al. (1979), Koch (1975), Koch & Risser (1974), Pfiester et al. (1979),
          Seyfer & Wilhm (1977), Troeger (1978, 1983), Troeger & Menzel (1986), Wilhm et al. (1977),
          Wilhm et al. (1978), Williams (1962, 1964, 1972), Williams & Scott (1962), WPSS (1961-1963, 1966)
Cyclotella meneghiniana var. laevissima (van Goor) Hust.
    OK: Troeger (1978)
Cyclotella michiganiana Skv.
    KS: ?Williams et al. (1979)
Cyclotella nana Hust. = Thalassiosira pseudonana (Hust.) Hasle & Heimdal
    KS: Powers (1969)
Cyclotella operculata sensu (Ag.) Kütz. = Cyclotella distinguenda Hust. [see Håkansson (1989)]
    OK: Pfiester et al. (1979)
Cyclotella pseudostelligera Hust. = Cyclotella stelligera var. pseudostelligera (Hust.) Haw. & Hurley
    KS: Powers (1969), WPSS (1961-1963)
    MO: Pamperl (1980), WPSS (1961-1963)
    NE: WPSS (1961-1963)
    OK: WPSS (1961-1963)
Cyclotella radiosa (Grun.) Lemm.
        Synonyms:
            Cyclotella comta (Ehr.) Kütz.
Cyclotella rotula Kütz. = Stephanodiscus rotula (Kütz.) Hendey
    KS: Curtis (1901)
Cyclotella stelligera Cl. & Grun.
    KS: Williams et al. (1979), Wujek et al. (1980)
    MO: M.K. Morris et al. (1979a), Pamperl (1980)
    NE: F.A. Morris et al. (1979)
    OK: Hern et al. (1979), Pfiester & Terry (1978), Pfiester et al. (1979), Seyfer & Wilhm (1977), Troeger (1978),
           WPSS (1961-1963)
Cyclotella stelligera var. glomerata (Bachm.) Haw. & Hurley
        Synonyms:
            Cyclotella glomerata Bachm.
Cyclotella stelligera var. pseudostelligera (Hust.) Haw. & Hurley
        Synonyms:
            Cyclotella pseudostelligera Hust.
Cyclotella stelligera var. stelligeroides (Hust.) Haw. & Hurley
        Synonyms:
            Cyclotella stelligeroides Hust.
Cyclotella stelligeroides Hust. = Cyclotella stelligera var. stelligeroides (Hust.) Haw. & Hurley
    KS: Powers (1969)
Cyclotella striata (Kütz.) Grun.
    KS: McFarland et al. (1964)
    OK: Koch (1975), Pfiester et al. (1979)
Cyclotella striata var. bipunctata Fricke
    MO: Pamperl (1980)

Gallionella crenata Ehr. = Aulacoseira italica (Ehr.) Simons.
    OK: Ehrenberg (1856)
Gallionella distans Ehr. = Aulacoseira distans (Ehr.) Simons.
    NE: Ehrenberg (1856)
Gallionella laevis Ehr. = Aulacoseira distans (Ehr.) Simons.
    OK: Ehrenberg (1856)

Lysigonium crenulatum (Ehr.) Kuntze = Aulacoseira italica (Ehr.) Simons.
    NE: Andersen & Walker (1920), Elmore (1921)
Lysigonium distans (Ehr.) Kuntze = Aulacoseira distans (Ehr.) Simons.
    NE: Andersen & Walker (1920), Elmore (1921)
Lysigonium granulatum (Ehr.) Kuntze = Aulacoseira granulata (Ehr.) Simons
    NE: Elmore (1921)
Lysigonium varians (Ag.) DeT. = Melosira varians Ag.
    NE: Andersen & Walker (1920), Elmore (1921)

Melosira ambigua (Grun.) O. Müll. = Aulacoseira ambigua (Grun.) Simons.
    KS: WPSS (1961-1963)
    MO: WPSS (1961-1963)
    NE: Hoagland et al. (1982), Williams (1962), WPSS (1961-1963, 1966)
    OK: Hern et al. (1979), Pfiester et al. (1979), Wilhm et al. (1977), Williams (1962), WPSS (1961-1963, 1966)
Melosira binderana Kütz.
    OK: WPSS (1961-1963)
Melosira crenulata (Ehr.) Kütz. = Aulacoseira italica (Ehr.) Simons.
    KS: Curtis (1901)
Melosira distans (Ehr.) Kütz. = Aulacoseira distans (Ehr.) Simons.
    KS: Powers (1969), Williams et al. (1979)
    MO: M.K. Morris et al. (1979a)
    NE: F.A. Morris et al. (1979)
    OK: Hern et al. (1979), Pfiester et al. (1979), Wilhm et al. (1977), Wilhm et al. (1978)
Melosira distans var. alpigena Grun. = Aulacoseira distans var. alpigena (Grun.) Simons.
    KS: Powers (1969)
    OK: Williams (1962), WPSS (1961-1963)
Melosira distans var. lirata f. lacustris (Grun.) Bethage = Aulacoseira distans var. lirata f. lacustris
    (Grun.) Simons.
    MO: Pamperl (1980)
Melosira granulata (Ehr.) Ralfs = Aulacoseira granulata (Ehr.) Simons.
    CO: WPSS (1961-1963)
    KS: Branson (1966), Powers (1969), Reinke (1979a), Williams (1964, 1972), Williams et al. (1979), 
          WPSS (1961-1963)
    MO: M.K. Morris et al. (1979a), Pamperl (1980), Williams (1972), WPSS (1961-1963)
    NE: Hoagland et al. (1982), F.A. Morris et al. (1979), Williams (1962, 1964, 1972), WPSS (1961-1963, 1966)
    OK: Hern et al. (1979), Pfiester & Terry (1978), Pfiester et al. (1979), Troeger (1978), Wilhm et al. (1977),
           Wilhm et al. (1978), Williams (1962, 1964), WPSS (1961-1963, 1966)
Melosira granulata var. angustissima O. Müll. = Aulacoseira granulata var. angustissima
    (O. Müll.) Simons.
    KS: Powers (1969), Williams et al. (1979), Wujek et al. (1980)
    MO: M.K. Morris et al. (1979a), Pamperl (1980)
    NE: F.A. Morris et al. (1979)
    OK: Hern et al. (1979), Troeger (1983)
Melosira granulata var. angustissima f. curvata Grun. = Aulacoseira granulata var. angustissima
    f. curvata (Grun.) comb. nov.?
    MO: Pamperl (1980)
Melosira granulata var. angustissima f. spiralis Hust. = Aulacoseira granulata var. angustissima
    f. spiralis (Hust.) Czarn. & Reinke
    KS: Williams et al. (1979)
    OK: Hern et al. (1979)
Melosira italica (Ehr.) Kütz. = Aulacoseira italica (Ehr.) Simons.
    KS: Williams (1962), Williams et al. (1979), WPSS (1966)
    NE: F.A. Morris et al. (1979), WPSS (1961-1963)
    OK: Hern et al. (1979), Pfiester et al. (1979), Seyfer & Wilhm (1977), Wilhm et al. (1977), 
           Wilhm et al. (1978)
Melosira italica var. tenuissima (Grun.) O. Müll. = Aulacoseira italica var. tenuissima (Grun.) Simons.
    KS: Williams et al. (1979)
Melosira undulata (Ehr.) Kütz.
    OK: Wilhm et al. (1977)
Melosira varians Ag.
    CO: Cockerell (1888)
    KS: Curtis (1901), McFarland et al. (1964), Williams et al. (1979), Wujek et al. (1980)
    MO: M.K. Morris et al. (1979a), Pamperl (1980)
    NE: Andersen & Walker (1920), F.A. Morris et al. (1979), Webber (1889, 1890), Williams (1962), 
          WPSS (1961-1963, 1966)
    OK: Hern et al. (1979), Koch (1975), Koch & Risser (1974), Pfiester et al. (1979), Seyfer & Wilhm (1977),
          Wilhm et al. (1977), Wilhm et al. (1978), WPSS (1961-1963)
        Synonyms:
            Lysigonium varians (Ag.) DeT.

Pleurosira laevis (Ehr.) Compère
    KS: Harris & Eberle (2001)
        Synonyms:
            Biddulphia laevis Ehr.

Rhizosolenia sp. = Urosolenia sp. ?
    OK: Hern et al. (1979)
Rhizosolenia (Urosolenia) minima Lev.
    KS: Harris & Eberle (2001)

Skeletonema potamos (Weber) Hasle
    KS: Williams et al. (1979)
    MO: M.K. Morris et al. (1979a)
    OK: Hern et al. (1979)
Stephanodiscus alpinus Hust.
    KS: Powers (1969)
Stephanodiscus astraea?
      This species and its varieties have been reported from KS, MO, NE, and OK; however, taxonomic uncertainties with 
      this group make it virtually impossible to know which taxa have actually been collected without reexamining the 
      specimens. See Round (1981).
Stephanodiscus dubius (Fricke) Hust. = Cyclostephanos dubius (Fricke) Round
    CO: M.K. Morris et al. (1979b)
    KS: Wujek et al. (1980)
    MO: Pamperl (1980)
    NE: Hoagland et al. (1982), Roemer et al. (1984), WPSS (1961-1963)
Stephanodiscus hantzschii Grun.
    KS: Powers (1969), Williams (1962, 1964), Williams & Scott (1962), Williams et al. (1979), WPSS 
          (1961-1963, 1966), Wujek (1965)
    MO: Williams (1962, 1964, 1972), Williams & Scott (1962), WPSS (1961-1963, 1966)
    NE: Hoagland et al. (1982), Roemer et al. (1984), Williams (1962, 1964), Williams & Scott (1962), 
          WPSS (1961-1963, 1966)
    OK: Pfiester et al. (1979), Seyfer & Wilhm (1977), Wilhm et al. (1977), Wilhm et al. (1978), 
           Williams (1962), Williams & Scott (1962), WPSS (1961-1963, 1966)
Stephanodiscus hantzschii f. tenuis (Hust.) Håk. & Stoerm.
        Synonyms:
            Stephanodiscus tenuis Hust.
Stephanodiscus invisitatus Hohn & Hellerm. = Cyclostephanos invisitatus (Hohn & Hellerm.) 
    Ther., Stoerm., & Håk.
    KS: Powers (1969), Williams et al. (1979)
    NE: Roemer et al. (1984)
Stephanodiscus minutula (Kütz.) Round
    NE: Roemer et al. (1984)
        Synonyms:
            Stephanodiscus rotula var. minutula (Kütz.) Ross & Sims
Stephanodiscus niagarae Ehr.
    KS: WPSS (1961-1963)
    MO: M.K. Morris et al. (1979a), WPSS (1961-1963)
    NE: Elmore (1921), F.A. Morris et al. (1979), Williams (1962), WPSS (1961-1963, 1966)
Stephanodiscus rotula (Kütz.) Hendey
        Synonyms:
            Cyclotella rotula Kütz.
Stephanodiscus rotula var. minutula (Kütz.) Ross & Sims = Stephanodiscus minutula (Kütz.) Round
    NE: Hoagland et al. (1982)
Stephanodiscus tenuis Hust. = Stephanodiscus hantzschii f. tenuis (Hust.) Håk. & Stoerm.
    KS: Williams et al. (1979)
Stephanopyxis broschii Grun.
    OK: Pfiester & Terry (1978)

Thalassiosira fluviatilis Hust. = Thalassiosira weisflogii (Grun.) Fryxell & Hasle
    KS: Wujek et al. (1980)
    OK: Koch (1975)
Thalassiosira pseudonana (Hust.) Hasle & Heimdal
        Synonyms:
            Cyclotella nana Hust.
Thalassiosira weisflogii (Grun.) Fryxell & Hasle
        Synonyms:
            Thalassiosira fluviatilis Hust.

Urosolenia sp.
        Synonyms:
            Rhizosolenia sp.


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