Vegetative cells of Thraustochytrium, copyright Celeste Leander.

Belongs within: Heterokonta.

The Labyrinthulomycetes, slime nets, are a group of mostly aquatic protists producing a network of anastomosing filaments.

See also: Slime nets: another group of not-fungi; Return of the slime-nets.

Characters (from Adl et al. 2012): Producing an ectoplasmic network of branched, anastomosing, wall-less filaments via a specialized organelle known as the bothrosome; Golgi-derived scales; biciliate zoospores with lateral insertion in many species.

Labyrinthulomycetes (see below for synonymy)
    |--+--‘Thraustochytrium’ multirudimentale C-SC06
    |  `--Schizochytrium minutum C-SC06
    `--+--+--Labyrinthula Cienkowski 1867 C-SC06, AS12 [Labyrinthulaceae]
       |  `--+--Aplanochytrium kerguelense C-SC06
       |     |--Diplophrys Barker 1868 C-SC06, LT64 [Diplophryidae]
       |     |    |--*D. archeri Barker 1868 LT64
       |     |    `--D. marina C-SC06
       |     `--Labyrinthuloides C-SC06
       |          |--L. minuta [=Labyrinthula minuta] AC97
       |          |--L. saliens AC97
       |          |--L. schizochytrops AC97
       |          `--L. yorkensis AC97
       `--Thraustochytrium C-SC06
            |  i. s.: T. kinnei MNI02
            |--T. pachydermum C-SC06
            `--+--T. aggregatum C-SC06
               `--+--T. striatum C-SC06
                  `--Ulkenia C-SC06
                       |  i. s.: U. profunda MNI02
                       |--+--U. visurgensis C-SC06
                       |  `--Japonochytrium C-SC06
                       `--+--‘Labyrinthuloides’ haliotidis C-SC06
                          `--+--U. radiata C-SC06
                             `--‘Thraustochytrium’ aureum C-SC06

Labyrinthulomycetes incertae sedis:
  Sorodiplophrys C-S98
  Althornia AC97
  Elnia AS12
  Amphitremidae [Amphitrematidae, Amphitreminae] AS12
    |--Paramphitrema Valkanov 1970 G86
    |    `--P. pontica Valkanov 1970 G86
    |--Amphitrema Archer 1867 LT64
    |    `--*A. wrightianum Archer 1869 LT64
    `--Archerella Loeblich & Tappan 1961 (see below for synonymy) LT64
         `--*A. flavum (Archer 1877) [=*Ditrema flavum] LT64

Archerella Loeblich & Tappan 1961 [=Ditrema Archer 1877 non Temminck & Schlegel in von Siebold 1844] LT64

Labyrinthulomycetes [Labyrinthista, Labyrinthulales, Labyrinthulea, Labyrinthulia, Labyrinthulida, Labyrinthulidae, Labyrinthulomorpha, Labyrinthulomycota, Thraustochytriaceae, Thraustochytriales, Thraustochytridae]

*Type species of generic name indicated


[AS12] Adl, S. M., A. G. B. Simpson, C. E. Lane, J. LukeŇ°, D. Bass, S. S. Bowser, M. W. Brown, F. Burki, M. Dunthorn, V. Hampl, A. Heiss, M. Hoppenrath, E. Lara, E. Le Gall, D. H. Lynn, H. McManus, E. A. D. Mitchell, S. E. Mozley-Stanridge, L. W. Parfrey, J. Pawlowski, S. Rueckert, L. Shadwick, C. L. Schoch, A. Smirnov & F. W. Spiegel. 2012. The revised classification of eukaryotes. Journal of Eukaryotic Microbiology 59 (5): 429–493.

[AC97] Azevedo, C., & L. Corral. 1997. Some ultrastructural observations of a thraustochytrid (Protoctista, Labyrinthulomycota) from the clam Ruditapes decussatus (Mollusca, Bivalvia). Diseases of Aquatic Organisms 31: 73–78.

[C-S98] Cavalier-Smith, T. 1998. A revised six-kingdom system of life. Biological Reviews 73: 203–266.

[C-SC06] Cavalier-Smith, T., & E. E.-Y. Chao. 2006. Phylogeny and megasystematics of phagotrophic heterokonts (kingdom Chromista). Journal of Molecular Evolution 62: 388–420.

[G86] Golemansky, V. G. 1986. Rhizopoda: Testacea. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 5–16. E. J. Brill/Dr. W. Backhuys: Leiden.

[LT64] Loeblich, A. R., Jr & H. Tappan. 1964. Sarcodina: chiefly “thecamoebians” and Foraminiferida. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt C. Protista 2 vol. 1. The Geological Society of America and The University of Kansas Press.

[MNI02] Moriya, M., T. Nakayama & I. Inouye. 2002. A new class of the stramenopiles, Placididea classis nova: description of Placidia cafeteriopsis gen. et sp. nov. Protist 153: 143–156.

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