Excludenda

List of rejected and
problematic genera

A B C D E F G H I K L M N O P R S T U V W X Z
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A

ACHRONEMA Skuja, 1948. Symb. bot. upsal. 9(3): 30.
= Bacteria (Thiobacteriae).

ACTINOCEPHALUM Saito, 1905. Bot. Mag. Tokyo 19: 36.
= Fungi.

AGONIUM Ørsted, 1844. De region. mar., p. 44.
= Fungi (?).

ALLOGONIUM Kützing, 1843. Phycol. gener., p. 245.
= red alga (Bangiaceae).

ANHALTIA S. H. Schwabe, 1834. Linnaea 9: 127.
= Bacteria (?).

ASPALATIA Ercegović, 1927. Acta Bot. Inst. Bot. Univ. Zagreb. 2: 82.
= germlings of BANGIA (Bangiaceae); (FREMY 1934, GEITLER 1942).

ASTEROCYSTIS Gobi, 1879. Arb. St. Petersb. Ges. Naturf. 10: 83.
= red alga (Bangiaceae).

ASTEROTHRIX Kützing, 1843. Phycol. gener., p. 200.
= Fungi (?).

ATRACTELLA Printz, 1921. Kgl. Norske Vidensk. Selsk. Skr. 1920, 1: 93.
= ? (Oscillatoriales), unclear description.

ARTACTIELLA Saccardo, 1886. Syll. Fung. 4: 578.
= Fungi.

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B
BEGGIATOA Trevisan, 1845. Nomencl. Alg. 58.
= Bacteria (nom. cons. among bacteria, against Trevisan, 1842).

BOANEMA Ercegović, 1927. Acta Bot. Inst. Bot. Univ. Zagreb. 2: 84.
= development stage of NEMALION (Rhodophyceae)

BRACHTIA Trevisan, 1848. Algae cocc., p. 57.
= green alga (Chlorophyceae)

BROMICOLLA Eichwald, 1843. Forh. Skand. Naturf. Mote 3: 615.
= green alga (Chlorophyceae)

BYSSUS [Mich.] Linné, 1753. Spec. plant., p. 1168.
= mixture of algae, incl. APHANIZOMENON (pre-starting-point).

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C
CALIALOA Trevisan, 1848. Alghe cocc., 41.
= unidentifiable

CALLONEMA Reinsch, 1874-1875. Contr. Algol. Fungol., p. 40.
= Rhodophyceae (?).

CAMPTOTHRIX West et West, 1897. J. Bot. 35: 269.
= unidentifiable, probably initial stages of another cyanophyte-species.

CHAETOCOCCUS Kützing, 1849. Tab. phycol. 1: 51.
= unidentifiable.

CHALARODORA Pascher, 1929. Jahrb. wiss. Bot. 71: 460.
= genus of Glaucophyceae.

CHAMAESIPHONOSIRA Geitler, 1975. Arch. Microbiol. 103: 234-236.
= Bacteria.

CHLOROBIUM Nadson, 1906. Bull. Jard. Bot. St. Petersburg 6: 190.
= Bacteria.

CHROODACTYLON Hansgirg, 1855. Ber. Dtsch. Bot. Ges. 3: 14.
= red alga (Rhodophyceae).

CHROOSTIPES Pascher, 1914. Ber. Dtsch. Bot. Ges. 32: 351.
= probably bacteria.

CHROOTHECE Hansgirg, 1884. Österr. bot. Ztschr. 34: 352.
= red alga (Rhodophyceae).

”CHRYSOSTIGMA Kirchner, 1843”
= pre-starting-point name, probably used for Scytonema cincinatum.

”CHTHONOBLASTUS Kützing, 1843”
= pre-starting-point name, used for different genera, mainly from Oscillatoriales
(unclear
typification).

CLADISCOTHALLUS Renault, 1896. Etud. Gites Min. France, 553.
= fossil alga (Cyanophyte ?).

CLATHROCHLORIS Geitler, 1925. Pascher´s Süsswasserfl. 12: 457.
= Bacteria.

CLONOTHRIX Roze, 1896. J. Bot. 10: 325.
= Bacteria.

COLLENIA Walcott, 1914. Smiths. Misc. Coll. 64(2): 110.
= fossil species of Cyanophytes.

CONIDIOTHRIX Benecke et Petersen, 1921. Dansk Bot. Arkiv. 4(1): 8.
= Bacteria.

CONSTANTINEA Postels et Ruprecht, 1840. III. Alg., p. 17.
= red alga (Rhodophyceae).

CYANIDIUM Geitler, 1935. Arch. Hydrobiol., Suppl. 12: 624.
= red alga (Rhodophyceae)

CYANOCHAETE Gobi, 1916. Bot. Jap. 30: 6.
= GLOEOCHAETE Lagerh., 1883; (Glaucophyceae), nomen altern.

CYANOCLOSTER Kufferath, 1929. Ann. Crypt. Exot. 2: 49.
= probably MONORAPHIDIUM (Chlorellales, Chlorophyceae); type-species; C.
muscicolus
from Costarica.

CYANOCOCCUS Hansgirg, 1905. Beih. Bot. Centralbl. 18, 2: 521.
= ? (possibly Glaucophyceae).

CYANOCYTA Hall et Claus, 1963. J. Cell. Biol. 19: 558.
= Glaucophyceae.

CYANOPHORA Koršikov, 1924. Russ. Arch. Protistol. 3: 57, 71.
= Glaucophyceae.

CYANOPTYCHE Pascher, 1929. Jahrb. wiss. Bot. 71: 459.
= Glaucophyceae.

CYANOTHECA Pascher, 1914. Ber. Dtsch. Bot. Ges. 32: 351.
= Bacteria (Caulobacteriae); see Claus, 1961.

CYCLOSPERMA Bonnemaison, 1822. J. phys. 44: 179.
= pre-starting-point syn. to LYNGBYA G. Agardh ex Gomont, 1892 (?).

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D
DACTYLOCOCCOPSIS Hansgirg, 1888. Notarisia 3: 590.
= green algae from the genera MONORAPHIDIUM and ANKISTRODESMUS (Chlorellales,
Chlorophyceae); type-species: D. rupestris from Czechoslovakia; sensu auct.
post. = RHABDOGLOEA Schröder, 1917; or MYXOBAKTRON Schmidle, 1904.

DACTYLOGLOEA Borzi (1887) ex Borzi, 1914. N. Giorn. Bot. Ital., N. S. 21(4):
348, 358.
= 1887 – nomen nudum, 1914 – unidentifiable (Oscillatoriales ?).

DERMOCARPA Crouan et Crouan, 1858. Ann. Sci. Nat. Bot., ser. 4, 9: 70.
= nomen ambiguum (type = mixture of different species from different genera);
see Komárek
et Anagnostidis, 1986.

DERMOGLOEA Zanardini, 1872. Atti R. Istr. Veneto Sci. Lett. Arti, ser. 4,
1: 1885.
= undefiniable.

DESMANTHOS Skuja, 1956. Nova Acta Reg. Soc. Sci. Upsal., ser. 4, 16(3): 83.
= Bacteria; later homonym to DESMANTHUS Willdenow 1806 nom. cons.; =
SKUJAEPHYCONEMA Burkart, 1959.

DETONIELLA Trevisan in De Toni et Trevisan, 1889. Syll. Schizomyc., p. 929.
= Bacteria.

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E
ELISA Gray, 1821. New Arr. Brit. Pl. 1: 282.
= mixture of filamentous Cyanophytes and Algae.

EMBRYOSPHAERA Trevisan, 1848. Alg. coccot., p. 36.
= green alga (Chlorophyceae).

ENTOTHRIX Kützing, 1843. Phycol gener., p. 224.
= unidentifiable; ex Forti 1907 = probably MICROCOLEUS.

ERNSTIELLA Chodat, 1911. Bull. Soc. Bot. Genéve 2, ser. 3: 125.
= mixture of Cyanophyte species (from the genera SIPHONONEMA, CHAMAESIPHON,

HETEROLEIBLEINIA, etc.).

ERYTHROCONIS Orsted, 1842. Naturhist. Tidsskr. 3: 555.
= unidentifiable.

EUACTIS Kützing, 1843. Phycol. gener., p. 240.
= pre-starting-point name, unclear taxonomic position; probably RIVULARIA.

EXOCOCCUS Nägeli, 1847. Neue Denkschr. Allg. Schweiz. Ges. Gesammten Naturwiss.

9(2): 170.
= unidentifiable genus and species from Cyanophyceae (? Hydrococcaceae).

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F
FILARSZKIA Forti in De Toni, 1907. Syll. Alg. 5: 258.
= hormocysts of Scytonema (?).

FRIDAEA Wille, 1909. In Engler & Prantl, Nat. Pflanzenfam., Nachtr. 1(2):
77, 79.
= later homonym (orth. var.) to FRIEDAEA Schmidle, 1905; (Chlorophyceae).

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G
GERVASIA Borzi ex Forti in De-Toni, 1907. Syll. Alg. 5: 704.
= nomen nudum.

GIRARDIA Gray, 1821. New Arr. Brit. Pl., 1: 287.
= unidentifiable.

GLAUCOCYSTIS Itzigsohn in Rabenhorst, 1854. Alg. eur. Exsicc., n. 1935.
= Glaucophyceae.

GLAUCOCYSTOPSIS Bourrelly, 1960. C. R. Hebd. Séances Acad. Sci. 251: 416.
= Glaucophyceae.

GLAUCOSPHAERA Koršikov, 1930. Arch. Protistenk. 70: 222.
= Glaucophyceae.

GOLIOTHRIX Zopf, 1882. Morph. Spaltpfl., p. 51.
= mixture of different Cyanophytes.

GLOEOCHAETE Lagerheim, 1883. Öfvers. Kgl. Vetensk. – Ak. Förhandl. 1883,
2: 39.
= Glaucophyceae.

GLOEOCAPSOMORPHA Zalesskij, 1918. Ežeg. Russk. Paleontol. Obšč. 1: 34.
= fossil cyanophyte genus.

GLOIONEMA Agardh, 1817. Syn. Alg. Scand., p. 120.
= pre-starting-point syn. of MICROCOLEUS (?).

GONIOTRICHUM Kützing, 1843. Linnaea 17: 89.
= red alga (Bangiaceae, Rhodophyceae).

GUYOTIA Schmidle, 1905. Allg. Bot. Ztschr. 11: 64.
= unclear described, unidentifiable genus (PLACOMA ?).

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H
HAPALOPSIS Kufferath, 1942. Bull. Soc. Roy. Bot. Belg. 74: 96.
= stage of STIGONEMA (?).

”HAPLONEMA Borzi, 1914”.
= probably invalidly published, taxonomically unclear.

HASSALLIA Trevisan, 1848. Alghe cocc., p. 67.
= later (and pre-starting-point) homonym to HASSALLIA Berkeley, 1845 (= HASSALLIA

Berkeley ex Bornet et Flahault, 1886).

HAVRELLA Breton et Saulot, 1986. Cryptogamie – Algologie 7, 4: 286-287.
= Bacteria.

HETEROCHROA Areschoug, 1866. Alg. Scand. Exs., ser. 2, 6: 289.
= later homonym to HETEROCHROA Bunge in Ledebour, 1830; pre-starting-point
syn.,
probably to SCHIZOTHRIX Kützing ex Gomont, 1892 (?).

HOMALOCOCCUS Kützing, 1863. Osterpr. Realschule Nordhausen, p. 6.
= unidentifiable.

HORMOBOLUS Borzi, 1914. Boll. Stud. Inform. Reale Giard. Colon. 1: 93.
= probably SCYTONEMA Agardh ex Bornet et Flahault, 1886 (?).

HUMIDA Gray, 1821. New Arr. Brit. Pl. 1: 281.
= unidentifiable, mixture of filamentous Cyanophytes.

HYGROCROCIS C. A. Agardh, 1824. Syst. Alg. 23: 45.
= Bacteria.

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I
IALOMITZIA Gruia, 1969. Rev. Algol., ser. 2, 7: 292.
= unclearly described, not revised (probably Fungi imperf.; comp. BOURRELLY
1970).

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J
JUGUSPIRA Crow, 1927. Trans. Amer. Micr. Soc. 46: 147.
= unclearly described, confused morphology.

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K
KIRCHNERIELLOPSIS Kufferath in Conrad et Kufferath, 1954. Mém. Inst. Roy.
Sci. Nat. Belg. 127: 271.
= probably coccal green alga without pyrenoid (? syn. with RAPHIDOCELIS).

KNEUCKERIA Schmidle, 1905. Allg. Bot. Ztschr. 1905: 64.
= red alga (Bangiaceae, Rhodophyceae).

KRKIA Pevalek, 1929. Acta Bot. Inst. Bot. Univ. Zagreb 6: 16.
= unclearly described, probably syn. with CYANOCYSTIS (?).

KYANOSTICHUS Romanov, 1964. Two new algae from a Calif. Oxid. Pond, p. 1.
= indeterminable cyanophyte species (?).

KYBOTION Pascher, 1940. Arch. Protistenk. 93: 348.
= Chrysophyceae.

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L
”LAGERHEIMIELLA Borzi, 1914”.
= non ”LAGERHEIMIELLA Boedijn, 1940”; probably invalidly published, unclear.

LAMPROPEDIA Schroeter, 1886. In Cohn, Kryptogamenfl. Schlesiens, 1: 151.
= Bacteria; later homonym is LAMPROPEDIA Pringsheim, 1966.

LEPTOTHRIX Kützing, 1843. Phycol. gener., p. 198.
= Bacteria.

LEUCONEMA Kaas, 1983.
= Bacteria.

LEUCONOSTOC Van Tieghem, 1878. Ann. Sci. Nat. Bot. 7(6): 198.
= Bacteria.

LEUCOTHRIX Örsted, 1844. De region mar., p. 44.
= Bacteria.

LIMNACTIS Kützing, 1843. Phycol. gener., p. 237.
= mixture of GLOEOTRICHIA and RIVULARIA, pre-starting-point genus.

”LITHONEMA Hassall, 1845”.
= pre-starting-point name, unclear; not LITHONEMA Ercegović, 1929.

LOPHOPODIUM Kützing, 1849. Tab. Phycol. 1: 45.
= unclear filamentous, heteropolar genus of Cyanophytes.

LOTEN Adanson, 1763. Fam. Plant. 2: 3.
= mixture of filamentous Cyanophytes.

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M
MARSSONIELLA Lemmermann, 1900. Ber. Dtsch. Bot. Ges. 18: 275.
= spores of GURLEYA (Microsporidia); see Komárek & Vávra, 1968.

”MASTICHOTHRIX Kützing, 1843”.
= pre-starting-point name, unclear content.

”MASTIGOTHRIX Reinsch, 1867”.
= pre-starting-point name, unclear; not MASTIGOTHRIX Poche, 1913.

MERISMOARCUS Hindák, 1988. Biológia, Bratislava, 43: 749.
= probably Bacteria.

MERIZOMYRIA Pollini, 1817. Biblkioth. Ital. 7: 420.
= unclear, probably a mixture of filamentous Cyanophytes; STIGONEMA (?).

MICRALOA Biasoletto, 1832. Alg. microsc., p. 44-47.
= unclear, according to Drouet & Daily, 1956 = fytoflagellates; type
species: M. protogenita.

”MICRASCIDIUM Borzi, 1914”.
= unclear, probably never validly published.

MICROCYSTIS Kützing, 1833. Linnaea 8: 372.
= green algae (Chlorophyceae).

MICRODISCUS Steinecke, 1915. Schr. Phys.-ökon. Ges. Königsberg 56: 25.
= unclear, epiphytic on CLOSTERIUM; type species = M. parasiticus (unclear
reproduction,
not revised).

MICROHALOA Kützing, 1843. Phycol. gener., p. 169.
= mixture of coccal Cyanophytes and green algae.

MONTANOA Guerrero, 1947. Anal. Jard. Bot. Madrid 7: 267.
= unclear description, possibly CALOTHRIX (?).

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N
NELLIECARTERIA De-Toni, 1936. Nomencl. Algol. 8: 5.
= Fungi.

NEMACOLA Massalongo, 1955. Flora 38: 36.
= unclear, probably a pre-starting-point syn. to MICROCOLEUS (?).

NEMATOCOCCUS Kützing, 1833. Linnaea 8: 381.
= Fungi.

NEOADELIA Bompard, 1867. Hedwigia 6: 129.
= unclear, probably pre-starting-point syn. to SYMPLOCA Kützing ex Gomont,
1892.

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O
OLIGOCLONIUM Brooker-Klugh, 1921. Contr. Canad. Biol. 1918/20: 181.
= degenerated oscillatoriacean trichomes.

”OSCILLARIA” sensu auct.
= pre-starting-point orth. var. of OSCILLATORIA Vaucher ex Gomont, 1892.

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P
PALMOGLOEA Kützing, 1843. Phycol. gener., p. 176.
= mixture of green algae with (?) APHANOCAPSA.

PARAPLECTONEMA Frémy, 1939. Arch. Bot. 3: 178.
= Bacteria.

PAULINELLA Lauterborn, 1895. Ztschr. Wiss. Zool., p. 59.
= syncyanotic genus of Testacea with cyanelles.

PEDIOCHLORIS Geitler, 1925. In Pascher´s Süsswasserfl. 12: 457.
= Bacteria.

PELODICTYON Lauterborn, 1913. Allg. Bot. Ztschr. 19: 98.
= Bacteria.

PELONEMA Lauterborn, 1916. Verh. Naturh. Med. Ver. Heidelberg 13: 408.
= Bacteria.

PELOPLOCA Lauterborn, 1913. Allg. Bot. Zrschr. 19: 99.
= Bacteria.

PHRAGMONEMA Zopf, 1882. Morph. Spaltpfl., p. 49.
= red alga (Rhodophyceae).

PHYTOCONIS Bory de Saint Vincent, 1797. Mém. Conferva & Byssus, p. 52.
= unidentifiable.

PILGERIA Schmidle, 1901.
Hedwigia
40: 53.
= unclear, unidentifiable.

PLEOCOCCUS Kützing, 1843. Linnaea 17: 84.
= syn. of ”BOTRYDINA Brébisson” (= consortium of COCCOMYXA with protonemes).

PLEUROCOCCUS Meneghini, 1837. Consp. Algol. Eugan., 337.
= nomen ambiguum, type = probably green alga (Chlorophyceae).

PLUTO Copeland, 1936. Ann. N. Y. Acad. Sci. 36: 72.
= CYANIDIUM (Rhodophyceae).

POLYCOCCUS Kützing, 1843. Linnaea 17: 84.
= probably developmental stage of Nostoc punctiforme.

PONTOTHRIX Nadson et Krasilnikov, 1932. Dokl. Akad. Nauk SSSR 1932 A: 264,
247.
= Bacteria.

PORPHYRIDIUM Nägeli, 1849. Gatt. einzell. Algen, p. 71.
= red alga (Bangiaceae, Rhodophyceae).

PORTACUS Rafinesque, 1819. J. Phys. 89: 107.
= unidentifiable genus, probably from Nostocales.

PSEUDOSPIRULINA Pankow et Jahnke, 1964. Österr. Bot. Ztschr. 111(4): 335.
= stalks of Vorticella.

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R
RHIZONEMA Thwaites in Smith et Sowerby, 1849. Suppl. Engl. Bot. 4: 2954.
= ? SCYTONEMA mixed with fungal hyphae.

ROSARIA N. Carter, 1922. J. Linn. Soc. 16: 54.
= NELLIECARTERIA (Fungi).

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S
SARCINASTRUM Lagerheim, 1900.
= Bacteria.

SCHMIDLEA Lauterborn, 1913. Allg. Bot. Zrschr. 19: 98.
= Bacteria.

SCYTHYMENIA Agardh, 1824. Syst. Alg., p. 20(xx).
= pre-starting-point syn. of STIGONEMA Agardh ex Bornet et Flahault, 1886
(?).

SKUJAEPHYCONEMA Burkhart, 1959. Darwiniana 11: 765.
= Bacteria.

SKUJAPELTA Hall et Claus, 1967. J. Phycol. 3: 50.
= Glaucophyceae.

SOROSPORA Hassall, 1845. Brit. Freshw. Algae 1: 309.
= probably mixture of several epilithic Cyanophyte species.

”SPHAENOCYSTIS Reinsch”
= erroneous citation, correctly see under ”SPHAENOSIPHON Reinsch”.

SPHAEROTHROMBIUM Kützing, 1833. Linnaea 8: 370.
= pro syn., unclear (? MICROCYSTIS Kützing ex Lemmermann, 1907).

STAUROCLADIA González-Guerrero, 1966. A. Inst. Bot. Cavanilles 23: 135.
= indeterminable Cyanophytes (?).

SYMPHYOSIPHON Kützing, 1843. Phycol. gener., p. 218.
= mixture of filamentous Cyanophytes.

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T
TETRAPEDIA Reinsch, 1867. Algenfl. Franken, p. 37.
= green algae from different genera; see Geitler 1942, Claus 1963.

TETRARCUS Skuja, 1934. Acta Horti Bot. Univ. Latv. 7: 46.
= probably Rhodobacteria.

THAMNIASTRUM Reinsch, 1888. Notarisia 3(11): 513.
= free stalk-system of Gomphosphaeriaceae (probably of SNOWELLA).

THIONEMA Kolkwitz, 1938. Ber. Dtsch. Bot. Ges. 56: 15.
= Bacteria.

THIOPLOCA Lauterborn, 1907. Ber. Dtsch. Bot. Ges. 25: 242.
= Bacteria.

THIOSIPHON Klas, 1936. Akad. Wiss. Wien Sitzungsb. mat.-nat. Kl., Abt. 145:
213.
= Bacteria.

THIOSPIRILLOPSIS Uphof, 1927. Arch. Hydrobiol. 18: 83.
= Bacteria.

THIOTHRIX Vinogradskij, 1888. Beitr. Morphol. Physiol. Bacter., p. 29.
= Bacteria.

TRICHOCYSTIS Kützing, 1846. Tab. phycol. 1: 20.
= ? zoochlorellas.

TRICHOSPIRA McNeill, 1948. Castanea 13: 44.
= unclear genus from Oscillatoriales; later homonym to TRICHOSPIRA Humboldt,
Bonpland
et Kunth, 1818.

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U
UROCOCCUS (Hassall) Hassall et Kützing, 1849. Spec. Alg., p. 206.
= green alga (Chlorophyceae).

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V
VAGINARIA Bonnemaison, 1822. J. Phys., Chém., Hist. Nat. & Arts 94: 175.
= pre-starting-point syn., probably to MICROCOLEUS Desmaziéres ex Gomont,
1892; later
homonym to VAGINARIA Persoon, 1805.

VAGINARIA Gray ex Kuntze, 1898. Rev. Gen. Pl. 3(3): 435.
= pre-starting-point syn., to MICROCOLEUS Desmaziéres ex Gomont, 1892; later
homonym to VAGINARIA Persoon, 1805.

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X
XANTHOTRICHUM Wille ex Schütt, 1893. Pflanzenleben Hochsee, p. 39.
Cyanophyceae, Oscillatoriales, Phormidiaceae, Phormidioideae
= TRICHODESMIUM Ehrenberg ex Gomont, 1892, nom. cons.

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Z
ZACHARIASIA Lemmermann, 1895. Vorarb. Fl. Plöner Seengeb., p. 60.
= unclear description, not revised (with “chlorophora stellata”), probably
a red alga (Bangiaceae, Rhodophyceae).

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