The following groups contain protists. The clade Opisthokonta also contains the animals and the fungi, and the kingdom Archaeplastida also contains algae and plants.
Legend:
* Lack of molecular data.
† Extinct, or exclusively fossil taxon.
? Uncertain position, reserved for above-genus taxa.
(P) Paraphyletic or polyphyletic taxon.
(P?) Potentially paraphyletic or polyphyletic taxon.
(=...) Taxonomic synonym.
(...) Same taxon in a different code of nomenclature.
Amorphea
The supergroup Amorphea contains very diverse heterotrophic organisms, from the macroscopic fungi and animals to the unicellular choanoflagellates and classical amoebae. They frequently exhibit the ability to produce multinucleated cells, a trait considered ancestral to Amorphea. They are also capable of producing pseudopodia, as does the closely related CRuMs clade, forming the clade Podiata.[3]
Amorphea is divided into two clades: Amoebozoa, containing well-known amoebae and slime molds, and Obazoa, containing animals, fungi, and their closest relatives. The relationship between these two clades was initially called 'Unikonta', due to a hypothesis where their common ancestor was a unikont, i.e., a eukaryote with just one flagellum.[4] However, this hypothesis was refuted, as there are bikont amorpheans (e.g., Breviata anathema) and it likely is not an ancestral trait to have a single flagellum.[5][6]
The clade Obazoa contains two small groups of flagellates, the breviates and the apusomonads, and
the large clade Opisthokonta, which contains animals, fungi, and their closest protist relatives.[10] Under the Cavalier-Smith system, breviates and apusomonads were two classes that composed the phylum Apusozoa,[11] but this taxon is paraphyletic, as apusomonads are more closely related to opisthokonts.[7] The taxonomy of apusomonads was expanded in a 2022 phylogenetic sudy that introduced many new genera.[12]
Opisthokonts are divided into two branches: Holozoa (animal-related), containing the ichthyosporeans, pluriformeans, filastereans and choanoflagellates; and Nucletmycea or Holomycota (fungus-related), containing the nucleariids and opisthosporidians. These groups, minus opisthosporidians, were classified as different classes within the paraphyletic phylum Choanozoa in the system of Cavalier-Smith, now obsolete. Instead, Choanozoa is the name used for the clade containing choanoflagellates and animals. Opisthosporidians (aphelids, rozellids and microsporidians) are often studied as protists, but are also considered fungi by protistologists[10] and mycologists alike.[13] Both Holozoa and Nucletmycea have been proposed once as superkingdoms by a group of mycologists who classified nucleariids and fungi as kingdoms, but without any mention of holozoan kingdoms.[14]
NucletmyceaBrown et al. 2009 (=Holomycota Liu et al. 2009)
Cladogram of the major groups of Amoebozoa based on an 824-gene phylogenetic analysis published in 2022.[25]
The phylum Amoebozoa contains around 2,400 species[26] of primarily amoeboid protists.[10] It includes a large portion of the traditional Sarcodina, the taxon uniting all amoebae. In particular, it groups naked and testate lobose amoebae (the traditional Lobosa), as well as the archamoebae and eumycetozoans (slime molds), and a few flagellates.[27] After the general 2019 revisions published by the International Society of Protistologists (ISOP),[10] there have been specific revisions to the classification of eumycetozoans[28] and testate amoebae.[29]
Order Protosteliida (Protosteliales) L.S.Olive & Stoian. 1966 sensu Shadwick & Spiegel in Adl et al. 2012, family Protosteliidae (Protosteliaceae) L.S.Olive & Stoian. 1966, genus Protostelium (incl. Planoprotostelium).
Order FractovitellidaLahr et al. 2011 sensu Kang et al. 2017
EumycetozoaZopf 1884 sensu Kang et al. 2017 (=Mycetozoa de Bary 1859 ex Rostafinski 1873, Macromycetozoa Fiore-Donno 2010)
Class DictyosteleaLister 1909 sensu Sheikh et al. 2018 (Dictyosteliomycetes Doweld 2001). Genus unassigned to any order: Synstelium. Genus incertae sedis: Coenonia.[46]
Class Ceratiomyxomycetes (Ceratiomyxea) D. Hawksw., B. Sutton & Ainsw. 2019,[28] order ProtosporangiidaShadwick & Spiegel in Adl et al. 2012 (Ceratiomyxales G.W. Martin ex M.L. Farr & Alexop.)
Order PrasinococcalesGuillou et al. ex Leliaert et al. 2016 emend. Marin & Melkonian in Li et al. 2020 → family PrasinococcaceaeLeliaert et al. 2016. Sole genus: PrasinococcusMiyashita & Chihara in Miyashita et al. 1993.
Class ChloropicophyceaeLopes dos Santos & Eikrem 2017 → order Chloropicales Lopes dos Santos & Eikrem 2017 → family Chloropicaceae Lopes dos Santos & Eikrem 2017. Genera: ChloroparvulaLopes dos Santos & Eikrem 2017; ChloropiconLopes dos Santos & Eikrem 2017.
Order MonomastigalesR.E.Norris ex Marin & Melkonian 2010 (=Monomastigales Norris in Parker 1982 nomen nudum) → family Monomastigaceae Marin & Melkonian 2010. Sole genus: MonomastixScherffel 1912.
Class NephroselmidophyceaeCavalier-Smith 1993 emend. Yamaguchi 2011 → order Nephroselmidales Nakayama, Suda, Kawachi & Inouye 2007 → family Nephroselmidaceae Pascher 1913 ex Silva 1980. Genera: NephroselmisStein 1878.
Class PicocystophyceaeLopes dos Santos & Eikrem 2017 → order Picocystales Lopes dos Santos & Eikrem 2017 → family Picocystaceae Lopes dos Santos & Eikrem 2017. Sole genus: PicocystisR.A.Lewin in Lewin et al. 2000.
Class PseudoscourfieldiophyceaeCrépeault, C.Otis, Pombert, Turmel & Lemieu 2024 → order Pseudoscourfieldiales Melkonian 1990 ex Crépeault, C.Otis, Pombert, Turmel & Lemieu 2024 → family Pseudoscourfieldiaceae Melkonian 1990 ex Crépeault, C.Otis, Pombert, Turmel & Lemieu 2024 (=Pycnococcaceae Guillard in Guillard, Keller, O'Kelly & Floyd 1991 emend. M.W.Fawley in Fawley et al. 1999. Sole genus: PseudoscourfieldiaManton 1975 (=PycnococcusGuillard in Guillard, Keller, O'Kelly & Floyd 1991).[53]
Class PyramimonadophyceaeMoestrup & Daugbjerg in Daugbjerg et al. 2020[54] → order Pyramimonadales Chadefaud 1950
Cladogram of Pancryptista based on 2020 and 2022 analyses.[64][65]
The phylum Cryptista contains heterotrophic and photosynthetic single-celled flagellates. Its classification has undergone many changes through the years, and several conflicting systems and nomenclatures coexist. It was described by Thomas Cavalier-Smith in 1989 to unite two distinct groups of flagellates: the photosynthetic cryptomonads, and the heterotrophic goniomonads (respectively the two classes Cryptomonadea and Cyathomonadea). The name Cryptista was meant to be a synonym of Cryptophyta,[66] the algal division described by the same author in previous years.[67] In 2004, he modified the classification of Cryptista to add two subphyla: Cryptomonada, containing the aforementioned classes (renamed as Cryptophyceae and Goniomonadea respectively), and Leucocrypta, containing the heterotrophic katablepharids.[68] The next year, a separate group of authors proposed a different higher ranking for katablepharids as a phylum Kathablepharida or division Katablepharidophyta, related to but independent from phylum Cryptophyta, with no mention of Cryptista.[69] Between 2013 and 2015, Cavalier-Smith updated the classification once more by describing three new subphyla: Rollomonadia, containing the previous subphyla lowered to superclasses; Palpitia, containing the flagellate Palpitomonas bilix;[70] and Corbihelia, containing picozoans, telonemids, and some heliozoan species (Heliomorpha and Microheliella).[71] Corbihelia did not reach consensus: later analyses and revisions separated telonemids and picozoans as their own clades, and placed Heliomorpha in Cercozoa.[10] However, the addition of Palpitomonas and the monophyly of Rollomonadia have been supported in other analyses.[64]
Cryptista was redefined in the 2019 ISOP revision as the clade containing Palpitomonas, katablepharids, goniomonads and cryptomonads. However, this revision introduced yet another classification system that is contradictory with the previous ones. They proposed a single class Cryptophyceae uniting cryptomonads, goniomonads and katablepharids, and treated cryptomonads as a single order Cryptomonadales,[10] although this does not follow scientific consensus: there are more cryptomonad orders (e.g., Pyrenomonadales, Tetragonidiales) and the name Cryptophyceae was already used for taxa that excluded katablepharids[72] and often excluded goniomonads too.[71] There has not been a new revision since.
Unlike with Heliomorpha, the genus Microheliella was genetically sequenced and its affinities have been resolved. In 2022, it was proposed as the sister group of Cryptista, in a clade known as Pancryptista.[65]
Class GoniomonadeaCavalier-Smith 1993 (=Cyathomonadea Cavalier-Smith 1989)[i]
Order Goniomonadida (Goniomonadales) Novarino & Lucas 1993 (=Cyathomonadales Lee 1989), family Goniomonadidae (Goniomonadaceae) Hill 1991 (=Cyathomonadaceae Pringsheim 1944), genus Goniomonas (=Cyathomonas).
Class BlastocysteaZierdt et al. 1967 → order Blastocystida Zierdt 1978 → family Blastocystidae Jiang & He 1988. Sole genus: BlastocystisAlexeieff 1911.
Infraphylum BikoseaCavalier-Smith 2018 (=Bicosoecida Grassé 1926 emend. Karpov 1998) → class Bikosea Cavalier-Smith 1986 as "Bicosoecea" orth. em. 2013. Genera not assigned to families: BilabrumSchoenle & Arndt in Schoenle et al. 2020;[82]CafileriaJirsová, Füssy, Richtová, Gruber, & Oborník 2019;[83]CantinaYubuki et al. 2015.
Subclass RictidiaCavalier-Smith in Cavalier-Smith & Scoble 2013 → order Rictida Cavalier-Smith in Cavalier-Smith & Scoble 2013 → family Rictidae Cavalier-Smith in Cavalier-Smith & Scoble 2013. Sole genus: RictusYubuki, Leander & Silberman 2010.
Subclass BicosidiaICZN/BicosoecophycidaeICNCavalier-Smith in Cavalier-Smith & Chao 2006
Superorder BorokiaeCavalier-Smith in Cavalier-Smith & Chao 2006 → order BorokidaICZN/BorokalesICNCavalier-Smith in Cavalier-Smith & Chao 2006 → family BorokidaeICZN/BorokaceaeICNCavalier-Smith in Cavalier-Smith & Chao 2006. Sole genus: BorokaCavalier-Smith in Cavalier-Smith & Chao 2006.
Class LabyrinthulomycetesArx 1970 ex Dick 2001 (=Labyrinthulea L.S.Olive 1975 ex Cavalier-Smith 1989, 'phylum' LabyrinthomorphaICZNPage in Levine et al. 1980/LabyrinthulomycotaICNWhittaker 1969)[86]
Family Diplophryidae Cavalier-Smith in Anderson & Cavalier-Smith 2012. Sole genus: DiplophrysBarker 1868.
Order AmphifilidaCavalier-Smith in Anderson & Cavalier-Smith 2012 as "Amphifiloidea"
Family AmphifilidaeCavalier-Smith in Anderson & Cavalier-Smith 2012. Sole genus: AmphifilaCavalier-Smith in Anderson & Cavalier-Smith 2012.
Family SorodiplophryidaeCavalier-Smith in Anderson & Cavalier-Smith 2012. Genera: FibrophrysTakahashi, Yoshida, Inouye & Watanabe 2016; SorodiplophrysCienkowski 1876.
Order OblongichytridaICZN/OblongichytrialesICNBennett et al. 2017 → family OblongichytriidaeICZN/OblongichytriaceaeICNCavalier-Smith in Anderson & Cavalier-Smith 2012. Sole genus: OblongichytriumR.Yokoyama & D.Honda 2006.
Order LabyrinthulidaICZNDoffein 1901/LabyrinthulalesICNE.A.Bessey 1950
Family AplanochytriidaeICZN/AplanochytriaceaeICNLeander ex Cavalier-Smith in Anderson & Cavalier-Smith 2012. Sole genus: AplanochytriumBahnweg & Sparrow 1972 emend. C.A.Leander & D.Porter 2000 (=LabyrinthuloidesF.O.Perkins 1973).
Family LabyrinthulidaeICZNCienkowski 1867/LabyrinthulaceaeICNHaeckel 1868. Sole genus: LabyrinthulaCienkowski 1864 (=ChlamydomyxaArcher 1875, PseudoplasmodiumMolisch 1926, LabyrinthodictyonValkanov 1969, LabyrinthorhizaChadefaud 1956).
Family-level clade "StellarchytriidaeICZN/StellarchytriaceaeICN". Sole genus: StellarchytriumFioRito & Leander 2016.
Class EogyreaCavalier-Smith 2013 (=clade MAST-6). Genera not assigned to families: MastreximonasLax, Cho & Keeling 2024; VomastromonasTikhonenkov, Prokina, Cho & Keeling 2024.[88]
Order EogyridaCavalier-Smith 2018[89] → family PseudophyllomitidaeICZN/PseudophyllomitaceaeICNShiratori et al. 2017.[90] Sole genus: PseudophyllomitusLee 2002.
Family ActinophryidaeDujardin 1841. Sole genus: ActinophrysEhrenberg 1830 (=TrichodaMüller 1773 nomen oblitum, PeritrichaBory de St.Vincent 1824 nomen dubium).
Class OlisthodiscophyceaeBarcytė, Eikrem & M. Eliáš 2021 → order Olisthodiscales Cavalier-Smith 2013 emend. Barcytė, Eikrem & M. Eliáš 2021 → family Olisthodiscaceae Cavalier-Smith 2013 emend. Barcytė, Eikrem & M. Eliáš 2021.[105] Sole genus: OlisthodiscusCarter 1937.
Class ChrysoparadoxophyceaeWetherbee in Wetherbee et al. 2019 → order Chrysoparadoxales Wetherbee in Wetherbee et al. 2019 → family Chrysoparadoxaceae Wetherbee in Wetherbee et al. 2019.[106] Genera: ChrysoparadoxaWetherbee in Wetherbee et al. 2019; Nematochrysis?Pascher 1925 (=ChrysowaernellaGayral & Lepailleur 1971).[100]
Class PhaeosacciophyceaeR.A.Andersen, L.Graf & H.S.Yoon in Graf et al. 2020 → order Phaeosacciales R.A.Andersen, L.Graf & H.S.Yoon in Graf et al. 2020[100]
Cladogram of Alveolata, based on a SSU rDNA phylogeny of basal alveolates[111] and a 203-gene phylogeny of apicomplexans and their relatives[112] published in 2023.
Colponemida(P)Cavalier-Smith 1993 emend. Adl et al. 2019 (=Protalveolata Cavalier-Smith 1991 emend. 2017. Genera not assigned to families: NeocolponemaGigeroff et al. 2023; LoeffelaGigeroff et al. 2023[111]
Phylum[o]ColponemidiaTikhonenkov et al. 2014 → class Colponemea Cavalier-Smith 1993 → order Colponemida Cavalier-Smith 1993 → family Colponemidae Cavalier-Smith & Chao 2004. Sole genus: ColponemaStein 1878.
Phylum[o]AcavomonidiaTikhonenkov et al. 2014 → class Acavomonea Tikhonenkov et al. 2014 → order Acavomonida Tikhonenkov et al. 2014 → family Acavomonidae Tikhonenkov et al. 2014. AcavomonasTikhonenkov et al. 2014.
Order PalustrimonadidaCavalier-Smith 2017 → family Palustrimonadidae Cavalier-Smith 2017. Sole genus: PalustrimonasPatterson & Simpson 1996.
Myzozoa
Phylum[o]ChromeridaR.B.Moore et al. 2008 → class ColpodellophyceaeMolinari & Guiry 2023[113] ("chrompodellids")[114] → order ColpodellalesICN/ColpodellidaICZNCavalier-Smith 1993 emend. Adl et al. 2005, 2019. Incertae sedis genus: PiridiumPatten 1936.[115]
Family VitrellaceaeOborník & Lukeš 2011. Sole genus: VitrellaOborník & Lukeš 2011.
Family ChromeraceaeOborník & Lukeš 2012. Sole genus: ChromeraR.B.Moore et al. 2008.
Family AlphamonadaceaeICN/AlphamonadidaeICZNCavalier-Smith in Cavalier-Smith & Chao 2004. Sole genus: AlphamonasAléxéieff 1918.
Phylum[o]PerkinsozoaNorén & Moestrup in Norén et al 1999 → class Perkinsea Levine 1978. Incertae sedis genera: PhagodiniumKristiansen 1993; RastrimonasBrugerolle 2003;[p]AcrocoelusFernández, Pardos, Benito & Arroyo 1999.
The metamonads were first described by Pierre-Paul Grassé in the first volume of Traité de Zoologie, published in 1952, as the superorder Metamonadina or Anaxostylaria. They were originally composed of zooflagellates with four or more flagella, known as polymastigotes and hypermastigotes (e.g., Trichomonas, Oxymonas).[168] These were later split into other groups such as the Parabasalia and Preaxostyla (over 260 and 140 species respectively),[169][170] regarded as individual phyla. After rRNA phylogenetic analyses demonstrated their relatedness, the concept of metamonads was reintroduced by Cavalier-Smith as a monophyletic phylum Metamonada that includes both groups, as well as the anaerobic Fornicata (e.g., the free-living Carpediemonas and the parasitic Giardia;[171][172] around 140 species).[169] In this system, Preaxostyla is known as subphylum Anaeromonada, and Fornicata and Parabasalia are two infraphyla that belong to the subphylum Trichozoa.[11] Still, some taxonomists retain the Parabasalia at a phylum level.[173]
The classifications of Preaxostyla and Fornicata were last revised separately in the 2017 Handbook of the protists[174][175][176] and the higher classification of Metamonada was revised by Cavalier-Smith in 2021.[11] The classification of Parabasalia was completely updated in 2024.[173] Two new smaller clades of metamonads have been described in addition: anaeramoebae[177] and the 'BaSk' clade, containing barthelonids and skoliomonads.[178] However, Parabasalia was treated as a separate phylum by the 2024 revision, instead of a member of phylum Metamonada.[173] For consistency, the classification listed below maintains Parabasalia as part of the phylum Metamonada.
Cladogram of heterolobosean orders based on combined phylogenomic and 18S rRNA analyses published in 2025.[186][187]
The phylum Heterolobosea contains around 170 species of amoebae, flagellates, and amoeboflagellates. It was initially established to unite two historically well-known amoeboid orders, Schizopyrenida (such as Naegleria fowleri, a human pathogen) and Acrasida (slime molds). Later, as more flagellates joined this grouping, the usage of Heterolobosea was split between two meanings: the more common usage applies to the entire clade,[10] while the usage by Cavalier-Smith and collaborators was restricted to a paraphyletic class of "traditional" heteroloboseans, with the name Percolozoa used for the phylum instead.[188][189] The first comprehensive phylogenomic study of Heterolobosea was published in 2025 by Tomáš Pánek and coauthors, resulting in its modern classification.[186]
Phylum HeteroloboseaPage & Blanton 1985 sensu Hanousková et al. 2019 (=Percolozoa Cavalier-Smith 1991)
The phylum Euglenozoa is home to at least 2,000 described species of single-celled flagellates of very dissimilar lifestyles. It was originally proposed to group the euglenids (such as the photosynthetic Euglena) and the kinetoplastids (like the pathogenic Trypanosoma), usually studied separatedly; eventually it included diplonemids and symbiontids as well.[190][191][192] Due to its share of photosynthetic species, traditionally regarded as algae, the phylum is also known as Euglenophyta by phycologists, and euglenids in particular were often studied as algae. Euglenids and kinetoplastids are the most diverse in terms of described species, although diplonemids may compose over 67,000 potential species.[192] The classification of euglenozoans was summarized by Cavalier-Smith in 2016.[191] A more phylogenetically precise revision of their classification was published in 2021 by Alexei Kostygov and coauthors,[192] with newer clades and genera described in the following years, particularly of euglenids. Still, one group of euglenids, the paraphyletic "ploeotids",[193] remains unresolved in the current classification, spread out across multiple clades.[194][195][196]
NebulidiaTikhonenkov et al. 2022 → NebulideaTikhonenkov et al. 2022 → NebulididaTikhonenkov et al. 2022 → NebulidaeTikhonenkov et al. 2022: NebulomonasTikhonenkov et al. 2022, AncoracystaJanouškovec, Tikhonenkov, Burki, Howe, Rohwer, Mylnikov & Keeling 2017.[211]
Telonemia
The phylum Telonemia (telonemids) contains a few species of flagellates found in ocean and fresh waters worldwide. It was originally proposed in 2006 for Telonema, a genus of previously uncertain affinity.[212] Under the Cavalier-Smith system, telonemids were initially classified as a class of Cryptista,[71] but later analyses consistently recovered it as a separate group.[18] Until 2019, only two species had been formally described, each belonging to a separate genus,[213] although environmental DNA sequencing suggests there are many more species not yet described.[214] In 2022, five additional species were described along with a third new genus, bringing the total number of species to seven.[215]
^The first eukaryotes were “neither plants, animals, nor fungi”, hence as defined, the Protista would include the earliest common ancestor of all eukaryotes.
^The position of the genera Microcorycia, Parmulina, Penardochlamys and Zonomyxa, which were listed in 2002 under family Microcoryciidae, is not clear. They are placed here by morphological characters but this needs to be supported by molecular data.[10]
^The two genera of Stygamoebidae, Stygamoeba and Vermistella, group together in some phylogenetic analyses, but usually appear separated. In 2019 they were considered only a potential branch of Discosea, unless proven otherwise.[10] A 2023 analysis places both genera in Flabellinia, closely related to Thecamoebida.[39]
^The 2019 revision by the ISOP ignores the grouping of some variosean genera into higher rank clades (orders and families) proposed in older studies, due to the weakly supported SSU rRNA phylogenetic analyses.[10]
^The 2019 revision by the ISOP inaccurately stated that goniomonads are classified as "Cyathomonadacea Pringsheim 1944".[10] The name Cyathomonadacea does not exist; Pringsheim only described the family Cyathomonadaceae based on the genus Cyathomonas, and later the order Cyathomonadales and class Cyathomonadea were described, each by different authors. However, as pointed out in 1993 by Gianfranco Novarino and Ian Lucas, this genus was based on a species that actually belonged to Goniomonas; since then, taxonomists have prioritized higher taxa named after it (Goniomonadaceae, Goniomonadales/adida, Goniomonadea) instead.[72]
^The genus Tetragonidium is known only from one written diagnosis and some illustrations, and its affinities with cryptomonads are very uncertain.[72]
^Within the order Anoecida, the four families Anoecaceae, Caecitellaceae, Cafeteriaceae and Symbiomonadaceae were included by T. Cavalier-Smith in 2006. In a 2013 revision, he simplified the classification by transferring Symbiomonadaceae and Anoecaceae to Cafeteriaceae.[84] However, both of those families remain accepted by the scientific community as independent from Cafeteriaceae as of 2020.[82]
^ abCavalier-Smith hypothesized in 2013 a sister relationship between actinophryids and raphidophytes, with both groups placed under the taxon Raphidomonadea. The molecularly uncharacterized genus Commation was classified as part of this taxon.[84] However, the placement of actinophryids among ochrophytes is still unstable and uncertain,[95][96] and Commation has never been included in classifications since.[citation needed]
^O'Kelly placed the genera Antarctosaccion, Chrysomeris, Chrysonephos, Nematochrysis/Chrysowaernella, Phaeosaccion and Rhamnochrysis in the order Chrysomeridales nomen nudum in 1989,[98] and Cavalier-Smith placed it inside the class Chrysomeridophyceae (spelt originally as Chrysomerophycea) in 1995.[99] However, the class was proven to be polyphyletic. As a result, some of its genera (Nematochrysis/Chrysowaerella) were transferred to the class Chrysoparadoxophyceae, while others (Antarctosaccion and Phaeosaccion) were transferred to the class Phaeosacciophyceae. Due to a lack of molecular data, the placement of Chrysomeris, Chrysonephos and Rhamnochrysis remains unknown.[100]
^The position of Eustigmatophyceae is still unstable, with different phylogenetic methodologies showing affinities to either of the SI and SII clades.[102][96]
^ abcdefThe taxonomic ranks above class level (phylum, subphylum, infraphylum, etc.) are unstable within the Alveolata, due to the many different existing classifications. For example, the phylum-level rank has been traditionally assigned to Perkinsozoa,[116] Dinoflagellata, Chromerida and Apicomplexa, all of which have been classified as phylum Myzozoa,[117] which in turn has been classified inside phylum Miozoa.[89] Treating the four myzozoan groups as separate phyla is generally accepted among phycologists,[118] while at the same time the rejection of higher taxonomic ranks due to being superfluous is prevalent among protistologists.[10]
^Apart from morphological descriptions, no molecular analysis has solidly affiliated Rastrimonas with the Perkinsozoa.[119]
^The genera Parallobiopsis, Ellobiocystis and Rhizellobiopsis are only provisionally placed among ellobiopsids.[130]
^Highly divergent 18S rRNA.[10] Since 2020 member of newly identified major apicomplexan subgroup Marosporida, putting together Aggregata octopiana Frenzel 1885, Merocystis kathae Dakin, 1911 (both Aggregatidae, originally coccidians), Rhytidocystis sp. 1 and Rhytidocystis sp. 2 Janouškovec et al. 2019 (Rhytidocystidae Levine, 1979, originally coccidians, Agamococcidiorida), and Margolisiella islandica Kristmundsson et al. 2011 (closely related to Rhytidocystidae)[135]
^This taxon is artificial; many of the families listed in it are not monophyletic and have little support from phylogenetic analyses.[10]
^Regarding the classification of Fornicata, there is a disconnect between the Cavalier-Smith system and the system described by different authors in the Handbook of the protists and other studies. The order Retortamonadida was originally defined as two genera: Chilomastix and Retortamonas. As both groups of taxonomists have reported, retortamonads are polyphyletic, because Chilomastix branches distantly from Retortamonas. In 2013, Cavalier-Smith fixed this taxonomic issue by modifying the retortamonads to only include Retortamonas, and describing a separate order Chilomastigida for Chilomastix only, placed among the early branching Carpediemonas-like organisms.[179] However, this has not yet been recognized by later studies from the other authors, as they have continued to report a polyphyletic Retortamonadida.[176][180][181] Because of this inconsistency, Eopharyngea (the clade formed by Retortamonadida plus Diplomonadida) is monophyletic only when considering one version of Retortamonadida, but not the other.
^The family Orodruinidae is possibly polyphyletic, and its type genus Orodruina may belong to the order Neovahlkampfiida.[186]
^Galindo LJ, Torruella G, López-García P, Ciobanu M, Gutiérrez-Preciado A, Karpov SA, Moreira D (2023). "Phylogenomics supports the monophyly of aphelids and fungi and identifies new molecular synapomorphies". Systematic Biology. 72 (3): 505–515. doi:10.1093/sysbio/syac054. PMID35900180.
^Borteiro, Claudio; Baldo, Diego; Maronna, Maximiliano Manuel; Ubilla (2018). "Amphibian parasites of the Order Dermocystida (Ichthyosporea): current knowledge, taxonomic review and new records from Brazil". Zootaxa. 4461 (4): 499–518. doi:10.11646/zootaxa.4461.4.3. hdl:11336/84098. PMID30314064. S2CID52977120.
^Nitsche, F.; Carr, M.; Arndt, H.; Leadbeater, B.S.C. (2011). "Higher Level Taxonomy and Molecular Phylogenetics of the Choanoflagellatea". Journal of Eukaryotic Microbiology. 58 (5): 452–462. doi:10.1111/j.1550-7408.2011.00572.x. PMID21895836.
^Carr M, Richter DJ, Fozouni P, Smith TJ, Jeuck A, Leadbeater BSC, Nitsche F (2017). "A six-gene phylogeny provides new insights into choanoflagellate evolution". Molecular Phylogenetics and Evolution. 107: 166–178. Bibcode:2017MolPE.107..166C. doi:10.1016/j.ympev.2016.10.011. PMID27765632.
^Schiwitza, Sabine; Arndt, Hartmut; Nitsche, Frank (2019). "First description of an euryoecious acanthoecid choanoflagellate species, Enibas tolerabilis gen. et sp. nov. from a salar in the Chilean Andes based on morphological and transcriptomic data". European Journal of Protistology. 67: 106–113. doi:10.1016/j.ejop.2018.11.004. PMID30572146. S2CID58552347.
^ abSmirnov, Alexey; Nassonova, Elena; Geisen, Stefan; Bonkowski, Michael; Kudryavtsev, Alexander; et al. (2017). "Phylogeny and Systematics of Leptomyxid Amoebae (Amoebozoa, Tubulinea, Leptomyxida)". Protist. 168 (2): 220–252. doi:10.1016/j.protis.2016.10.006. ISSN1434-4610. PMID28343121.
^Tyml, Tomáš; Lisnerová, Martina; Kostka, Martin; Dyková, Iva (2018). "Current view on phylogeny within the genus Flabellula Schaeffer, 1926 (Amoebozoa: Leptomyxida)". European Journal of Protistology. 64: 40–53. doi:10.1016/j.ejop.2018.03.005. PMID29674177.
^Bobrov, Anatoly; Mazei, Yuri (2017). "A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species". Zootaxa. 4282 (2): 292–308. doi:10.11646/zootaxa.4282.2.4.
^Tice, Alexander K.; Spiegel, Frederick W.; Brown, Matthew W. (2023). "Phylogenetic placement of the protosteloid amoeba Microglomus paxillus identifies another case of sporocarpic fruiting in Discosea (Amoebozoa)". Journal of Eukaryotic Microbiology. 70 (4): e12971. doi:10.1111/jeu.12971. PMID36825799.{{cite journal}}: CS1 maint: article number as page number (link)
^Melton, James T.; Wood, Fiona C.; Branch, Jordan; Singla, Mandakini; Tekle, Yonas I. (February 2019). "Phylogenomics of Thecamoebida (Discosea, Amoebozoa) with the Description of Stratorugosa tubuloviscum gen. nov. sp. nov., a Freshwater Amoeba with a Perinuclear MTOC". Protist. 170 (1): 8–20. doi:10.1016/j.protis.2018.09.002. ISSN1434-4610. PMID30553127. S2CID56174714.
^Mesentsev, Yelisei; Bondarenko, Natalya; Kamyshatskaya, Oksana; Nassonova, Elena; Glotova, Anna; et al. (17 August 2022). "Thecochaos is not a myth: study of the genus Thecochaos (Amoebozoa, Discosea) – a rediscovered group of lobose amoeba, with short SSU gene". Organisms Diversity & Evolution. 23 (1): 7–24. Bibcode:2023ODivE..23....7M. doi:10.1007/s13127-022-00581-9. S2CID251658030.
^Pánek, Tomáš; Zadrobílková, Eliška; Walker, Giselle; Brown, Matthew W.; Gentekaki, Eleni; et al. (2016). "First multigene analysis of Archamoebae (Amoebozoa: Conosa) robustly reveals its phylogeny and shows that Entamoebidae represents a deep lineage of the group". Molecular Phylogenetics and Evolution. 98: 41–51. doi:10.1016/j.ympev.2016.01.011.
^Sheikh, Sanea; Thulin, Mats; Cavender, James C.; Escalante, Ricardo; Kawakami, Shin-Ichi; Lado, Carlos; Landolt, John C.; Nanjundiah, Vidyanand; Queller, David C.; Strassmann, Joan E.; Spiegel, Frederick W.; Stephenson, Steven L.; Vadell, Eduardo M.; Baldauf, Sandra L. (February 2018). "A New Classification of the Dictyostelids". Protist. 169 (1): 1–28. doi:10.1016/j.protis.2017.11.001. PMID29367151.
^Lloyd, Sarah J.; Leontyev, Dmytro V.; Moreno, Gabriel; Villalba, Ángela López; Schnittler, Martin (30 Nov 2023). "Tasmaniomyxa umbilicata, a new genus and new species of myxomycete from Tasmania". Mycologia. 116 (1): 170–183. doi:10.1080/00275514.2023.2274252. PMID38032605. S2CID265504848.
^Zechman, F. W.; Verbruggen, H.; Leliaert, F.; Ashworth, M.; Buchheim, M. A.; Fawley, M. W.; Spalding, H.; Pueschel, C. M.; Buchheim, J. A.; Verghese, B.; Hanisak, M. D. (2010). "An Unrecognized Ancient Lineage of Green Plants Persists in Deep Marine Waters". Journal of Phycology. 46 (6): 1288–1295. Bibcode:2010JPcgy..46.1288Z. doi:10.1111/j.1529-8817.2010.00900.x.
^Daugbjerg, Niels; Fassel, Nicolai M.D.; Moestrup, Øjvind (2020). "Microscopy and phylogeny of Pyramimonas tatianae sp. nov. (Pyramimonadales, Chlorophyta), a scaly quadriflagellate from Golden Horn Bay (eastern Russia) and formal description of Pyramimonadophyceae classis nova". European Journal of Phycology. 55 (1): 49–63. Bibcode:2020EJPhy..55...49D. doi:10.1080/09670262.2019.1638524.
^Marin B (2012). "Nested in the Chlorellales or independent class? Phylogeny and classification of the Pedinophyceae (Viridiplantae) revealed by molecular phylogenetic analyses of complete nuclear and plastid-encoded rRNA operons". Protist. 163 (5): 778–805. doi:10.1016/j.protis.2011.11.004. PMID22192529.
^Fučíková, Karolina; Lewis, Paul O.; Lewis, Louise A. (2013). "Putting incertae sedis taxa in their place: a proposal for ten new families and three new genera in Sphaeropleales (Chlorophyceae, Chlorophyta)". Journal of Phycology. 50 (1): 14–25. doi:10.1111/jpy.12118. PMID26988005.
^ abFučíková K, Taylor M, Lewis LA, Niece BK, Isaac AS, Pietrasiak N (2023). "Johansenicoccus eremophilus gen. et sp. nov., a novel evolutionary lineage in Chlorophyceae with unusual genomic features". Plant Ecology and Evolution. 156 (3): 311–325. Bibcode:2023PlEcE.156..311F. doi:10.5091/plecevo.105762.
^McManus HA, Lewis LA (2011). "Molecular phylogenetic relationships in the freshwater family Hydrodictyaceae (Sphaeropleales, Chlorophyceae), with an emphasis on Pediastrum duplex". Journal of Phycology. 47 (1): 152–163. Bibcode:2011JPcgy..47..152M. doi:10.1111/j.1529-8817.2010.00940.x. PMID27021721.
^ abcdNovarino, Gianfranco; Lucas, Ian A. N. (1993). "Some proposals for a new classification system of the Cryptophyceae". Botanical Journal of the Linnean Society. 111: 3–21. doi:10.1111/j.1095-8339.1993.tb01886.x.
^Clay, Brec L. (2015). "Cryptomonads". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification. Academic Press. ISBN978-0-12-385876-4.
^Zagumyonnyi, Dmitry G.; Radaykina, Liudmila V.; Keeling, Patrick J.; Tikhonenkov, Denis V. (2022). "Centrohelid heliozoans of Ukraine with a description of a new genus and species (Haptista: Centroplasthelida)". European Journal of Protistology. 86 125916. doi:10.1016/j.ejop.2022.125916. PMID36137331.
^Rybarski AE, Nitsche F, Park JS, Filz P, Schmidt P, Kondo R, Simpson AG, Arndt H (2021). "Revision of the phylogeny of Placididea (Stramenopiles): Molecular and morphological diversity of novel placidid protists from extreme aquatic environments". European Journal of Protistology. 81 125809. doi:10.1016/j.ejop.2021.125809. ISSN0932-4739. PMID34673437. S2CID236377023.
^Kostka, Martin (2017). "Opalinata". In Archibald, John M.; Simpson, Alastair G.B.; Slamovits, Claudio H. (eds.). Handbook of the Protists. Vol. 1 (2nd ed.). Springer. pp. 543–566. doi:10.1007/978-3-319-28149-0_4. ISBN978-3-319-28147-6.
^ abcSchoenle A, Hohlfeld M, Rosse M, Filz P, Wylezich C, Nitsche F, Arndt H (2020). "Global comparison of bicosoecid Cafeteria-like flagellates from the deep ocean and surface waters, with reorganization of the family Cafeteriaceae". European Journal of Protistology. 73 125665. doi:10.1016/j.ejop.2019.125665. PMID31978633.
^ abcCavalier-Smith, Thomas; Scoble, Josephine Margaret (2013). "Phylogeny of Heterokonta: Incisomonas marina, a uniciliate gliding opalozoan related to Solenicola (Nanomonadea), and evidence that Actinophryida evolved from raphidophytes". European Journal of Protistology. 49 (3): 328–353. doi:10.1016/j.ejop.2012.09.002. PMID23219323.
^Harder, Christoffer Bugge; Ekelund, Flemming; Karpov, Sergey A. (March 2014). "Ultrastructure and phylogenetic position of Regin rotiferus and Otto terricolus genera et species novae (Bicosoecida, Heterokonta/Stramenopiles)". Protist. 165 (2): 144–160. doi:10.1016/j.protis.2014.01.004. PMID24637333.
^Bennett, Reuel M.; Honda, D.; Beakes, Gordon W.; Thines, Marco (2017). "Labyrinthulomycota". In Archibald, John M.; Simpson, Alastair G.B.; Slamovits, Claudio H. (eds.). Handbook of the Protists. Vol. 1 (2nd ed.). Springer. pp. 507–542. doi:10.1007/978-3-319-28149-0_25. ISBN978-3-319-28147-6.
^Cho A, Tikhonenkov DV, Lax G, Prokina KI, Keeling PJ (2024). "Phylogenomic position of genetically diverse phagotrophic stramenopile flagellates in the sediment-associated MAST-6 lineage and a potentially halotolerant placididean". Molecular Phylogenetics and Evolution. 190 107964. Bibcode:2024MolPE.19007964C. doi:10.1016/j.ympev.2023.107964. PMID37951557.
^Dick, Michael W. (2001). Straminipilous fungi: systematics of the peronosporomycetes including accounts of the marine straminipilous protists, the plasmodiophorids and similar organisms. Dordrecht: Springer. doi:10.1007/978-94-015-9733-3. ISBN978-90-481-5639-9.
^Wynne, Michael J.; Furnari, Giovanni (2014). "A census of J.P.L.Dangeard's invalid taxa with proposals to resolve the nomenclatural problems of some of them". Nova Hedwigia. 98 (3): 515–527. Bibcode:2014NovaH..98..515W. doi:10.1127/0029-5035/2014/0169.
^Cavalier-Smith, T.; Chao, E.E.; Allsopp, M.T.E.P. (1995). "Ribosomal RNA evidence for chloroplast loss within Heterokonta: pedinellid relationships and a revised classification of ochristan algae". Archiv für Protistenkunde. 145 (3–4): 209–220. doi:10.1016/s0003-9365(11)80316-7.
^Přibyl, Pavel; Procházková, Lenka (2022). "Trebonskia zoosporica, gen. et sp. nov., a new member of the Goniochloridales (Eustigmatophyceae, Stramenopiles) with an unusual mode of reproduction". European Journal of Phycology. 58 (2): 199–213. doi:10.1080/09670262.2022.2089913.
^Wetherbee R, Jackson CJ, Repetti SI, Clementson LA, Costa JF, van de Meene A, Crawford S, Verbruggen H (April 2019). "The golden paradox - a new heterokont lineage with chloroplasts surrounded by two membranes". Journal of Phycology. 55 (2): 257–278. Bibcode:2019JPcgy..55..257W. doi:10.1111/jpy.12822. hdl:11343/233613. PMID30536815. S2CID54477112.
^Kulikovskiy M, Maltsev Y, Andreeva S, Glushchenko A, Gusev E, Podunay Y, Ludwig TV, Tusset E, Kociolek JP (2019). "Description of a new diatom genus Dorofeyukea gen. nov. with remarks on phylogeny of the family Stauroneidaceae". Journal of Phycology. 55 (1): 173–185. Bibcode:2019JPcgy..55..173K. doi:10.1111/jpy.12810. PMID30379324.
^ abGigeroff AS, Eglit Y, Simpson AG (2023). "Characterisation and cultivation of new lineages of colponemids, a critical assemblage for inferring alveolate evolution". Protist. 174 (2) 125949. doi:10.1016/j.protis.2023.125949. PMID37019068. S2CID257625613.
^Silberman JD, Collins AG, Gershwin LA, Johnson PJ, Roger AJ (2004). "Ellobiopsids of the genus Thalassomyces are alveolates". Journal of Eukaryotic Microbiology. 51 (2): 246–52. doi:10.1111/j.1550-7408.2004.tb00555.x. PMID15134262.
^Kwong WK, Irwin NAT, Mathur V, Na I, Okamoto N, Vermeij MJA, Keeling PJ (2021). "Taxonomy of the Apicomplexan Symbionts of Coral, including Corallicolida ord. nov., Reassignment of the Genus Gemmocystis, and Description of New Species Corallicola aquarius gen. nov. sp. nov. and Anthozoaphila gnarlus gen. nov. sp. nov". Journal of Eukaryotic Microbiology. 68 (4): e12852. doi:10.1111/jeu.12852. PMID33768669.{{cite journal}}: CS1 maint: article number as page number (link)
^Dumack K, Duckert C, Meinhardt R, Lara E, Bonkowski M (2021). "Description of Phaeobola aeris gen. nov., sp. nov (Rhizaria, Cercozoa, Euglyphida) Sheds Light on Euglyphida's Dark Matter". Journal of Eukaryotic Microbiology. 68 (2): e12835. doi:10.1111/jeu.12835. hdl:10261/255052. PMID33222324. S2CID227135214.{{cite journal}}: CS1 maint: article number as page number (link)
^Soler-Zamora, Carmen; Useros, Fernando; González-Miguéns, Rubén; Gómez-Rodríguez, Pablo; Lara, Enrique (10 July 2023). "The problem of 'shadow species' as illustrated with the taxonomic hotchpotch Cyphoderia ampulla (Rhizaria: Cyphoderiidae)". Zoological Journal of the Linnean Society. XX (2): 477–492. doi:10.1093/zoolinnean/zlad040.
^Bass D, Chao EE, Nikolaev S, Yabuki A, Ishida KI, Berney C, Pakzad U, Wylezich C, Cavalier-Smith T (2009). "Phylogeny of Novel Naked Filose and Reticulose Cercozoa: Granofilosea cl. n. and Proteomyxidea Revised". Protist. 160 (1): 75–109. doi:10.1016/j.protis.2008.07.002. ISSN1434-4610. PMID18952499.
^Engler A (1903). Syllabus der Pflanzenfamilien: eine Übersicht über das gesamte Pflanzensystem mit Berücksichtigung der Medicinal- und Nutzpflanzen nebst einer Übersicht über die Florenreiche und Florengebiete der Erde zum Gebrauch bei Vorlesungen und Studien über specielle und medicinisch-pharmaceutische Botanik (3rd ed.). Berlin: Borntraeger. doi:10.5962/bhl.title.22956.
^Dick, Michael W. (2001). Straminipilous Fungi: Systematics of the Peronosporomycetes Including Accounts of the Marine Straminipilous Protists, the Plasmodiophorids and Similar Organisms (1 ed.). Springer Dordrecht. doi:10.1007/978-94-015-9733-3. ISBN978-94-015-9733-3. S2CID28755980.
^ abTakahashi O, Maekawa T, Dumitrica P, Nguyen PD, Komatsu T (2022). "Latentifistularia and other radiolarian species from the lower Smithian (Lower Triassic) Lang Son Formation, NE Vietnam". Revue de micropaléontologie. 75 100610. Bibcode:2022RvMic..7500610T. doi:10.1016/j.revmic.2022.100610. S2CID246833665.
^Heiss AA, Warring SD, Lukacs K, Favate J, Yang A, Gyaltshen Y, Filardi C, Simpson AG, Kim E (2021). "Description of Imasa heleensis, gen. nov., sp. nov. (Imasidae, fam. nov.), a Deep-Branching Marine Malawimonad and Possible Key Taxon in Understanding Early Eukaryotic Evolution". Journal of Eukaryotic Microbiology. 68 (2): e12837. doi:10.1111/jeu.12837. PMID33274482. S2CID227281992.{{cite journal}}: CS1 maint: article number as page number (link)
^Grassé, Pierre-P. (1952). "Classe des zooflagellés Zooflagellata ou Zoomastigina (Euflagellata Claus, 1887): Généralités". In Cuénot, L.; Chatton, E.; Deflandre, G.; Grassé, P.-P.; Hollande, A.; Pavillard, J. (eds.). Traité de zoologie: anatomie, systématique, biologie. Tome I. Fascicule I. Phylogénie, protozoaires: généralités, flagellés. Paris: Masson. pp. 574–578.
^ abKulda, Jaroslav; Nohýnková, Eva; Čepička, Ivan (2017). "Retortamonadida (with Notes on Carpediemonas-Like Organisms and Caviomonadidae". In Archibald, John M.; Simpson, Alastair G.B.; Slamovits, Claudio H. (eds.). Handbook of the Protists. Vol. 2 (2nd ed.). Cham: Springer International Publishing. pp. 1247–1278. doi:10.1007/978-3-319-28149-0_3. ISBN978-3-319-28149-0. LCCN2017945328.
^Cavalier-Smith, Thomas (May 2013). "Early evolution of eukaryote feeding modes, cell structural diversity, and classification of the protozoan phyla Loukozoa, Sulcozoa, and Choanozoa". European Journal of Protistology. 49 (2): 115–178. doi:10.1016/j.ejop.2012.06.001. PMID23085100.
^Yubuki, Naoji; Huang, Sam S.C.; Leander, Brian S. (2016). "Comparative Ultrastructure of Fornicate Excavates, Including a Novel Free-living Relative of Diplomonads: Aduncisulcus paluster gen. et sp. nov". Protist. 167 (6): 584–596. doi:10.1016/j.protis.2016.10.001.
^Yubuki, Naoji; Zadrobílková, Eliška; Čepička, Ivan (2017). "Ultrastructure and Molecular Phylogeny of Iotanema spirale gen. nov. et sp. nov., a New Lineage of Endobiotic Fornicata with Strikingly Simplified Ultrastructure". Journal of Eukaryotic Microbiology. 64 (4): 422–433. doi:10.1111/jeu.12376. ISSN1066-5234.
^Simpson, Alastair G.B. (1997). "The identity and composition of the Euglenozoa". Archiv für Protistenkunde. 148 (3): 318–328. doi:10.1016/S0003-9365(97)80012-7.
^Lax, G.; Kolisko, M.; Eglit, Y.; Lee, W.J.; Yubuki, N.; et al. (June 2021). "Multigene phylogenetics of euglenids based on single-cell transcriptomics of diverse phagotrophs". Molecular Phylogenetics and Evolution. 159 107088. doi:10.1016/j.ympev.2021.107088. PMID33545276.
^Dyková, Iva; Fiala, Ivan; Pecková, Hana (2008). "Neoparamoeba spp. and their eukaryotic endosymbionts similar to Perkinsela amoebae (Hollande, 1980): Coevolution demonstrated by SSU rRNA gene phylogenies". European Journal of Protistology. 44 (4): 269–277. doi:10.1016/j.ejop.2008.01.004.
^Goodwin, Joshua D.; Lee, Thomas F.; Kugrens, Paul; Simpson, Alastair G.B. (1 August 2018). "Allobodo chlorophagus n. gen. n. sp., a Kinetoplastid that Infiltrates and Feeds on the Invasive Alga Codium fragile". Protist. 169 (6): 911–925. doi:10.1016/j.protis.2018.07.001. PMID30445354.
^Belyaev, Artem O.; Zagumyonnyi, Dmitriy G.; Mylnikov, Alexander P.; Tikhonenkov, Denis V. (2022). "The Morphology, Ultrastructure and Molecular Phylogeny of a New Soil-Dwelling Kinetoplastid Avlakibodo gracilis gen. et sp. nov. (Neobodonida; Kinetoplastea)". Protist. 173 (4): 125885. doi:10.1016/j.protis.2022.125885. PMID35667307. S2CID248711669.{{cite journal}}: CS1 maint: article number as page number (link)
^Poinar, George; Poinar, Roberta (1 September 2004). "Paleoleishmania proterus n. gen., n. sp., (Trypanosomatidae: Kinetoplastida) from Cretaceous Burmese Amber". Protist. 155 (3): 305–310. doi:10.1078/1434461041844259. PMID15552057.
^Hausmann K, Weitere M, Wolf M, Arndt H (2002). "Meteora sporadica gen. nov. et sp. nov. (Protista incertae sedis) – an extraordinary free-living protist from the Mediterranean deep sea". European Journal of Protistology. 38 (2): 171–177. doi:10.1078/0932-4739-00872.
^ abYazaki, Euki; Harada, Ryo; Isogai, Ryu; Bamba, Kohei; Ishida, Ken-ichiro; Inagaki, Yuji; Shiratori, Takashi (June 2025). "Glissandra oviformis n. sp.: a novel predatory flagellate illuminates the character evolution within the eukaryotic clade CRuMs". Open Biology. 15 (6). doi:10.1098/rsob.250057.
^Patterson, David J.; Simpson, A.G.B. (December 1996). "Heterotrophic flagellates from coastal marine and hypersaline sediments in Western Australia". European Journal of Protistology. 32 (4): 423–448. doi:10.1016/S0932-4739(96)80003-4.
^ abShɨshkin, Yegor (2022). "Spironematella terricola comb. n. and Spironematella goodeyi comb. n. (Hemimastigida = Hemimastigea = Hemimastigophora) for Spironema terricola and Spironema goodeyi with diagnoses of the genus and family Spironematellidae amended". Zootaxa. 5128 (2): 295–297. doi:10.11646/zootaxa.5128.2.8. PMID36101172. S2CID252220401.
^ abTikhonenkov, Denis V.; Mikhailov, Kirill V.; Gawryluk, Ryan M. R.; Belyaev, Artem O.; Mathur, Varsha; Karpov, Sergey A.; Zagumyonnyi, Dmitry G.; Borodina, Anastasia S.; Prokina, Kristina I.; Mylnikov, Alexander P.; Aleoshin, Vladimir V.; Keeling, Patrick J. (2022). "Microbial predators form a new supergroup of eukaryotes". Nature. 612 (7941): 714–719. Bibcode:2022Natur.612..714T. doi:10.1038/s41586-022-05511-5. PMID36477531. S2CID254436650.
^Shishkin, Yegor; Drachko, Daria; Zlatogursky, Vasily V. (22 April 2021). "The smallest known heliozoans are the Erebor lineage (nom. clad. n.) inside Microheliella maris (Eukaryota, Diaphoretickes), with the amendation of M. maris diagnosis and description of Berkeleyaesol magnus gen. nov., comb. nov. (Eukaryota, incertae sedis)". International Journal of Systematic and Evolutionary Microbiology. 71 (4). doi:10.1099/ijsem.0.004776. PMID33886450. S2CID233370018.
^Anderson, O. Roger; Cavalier-Smith, Thomas (2012). "Ultrastructure of Diplophrys parva, a New Small Freshwater Species, and a Revised Analysis of Labyrinthulea (Heterokonta)". Acta Protozoologica. 51: 291–304. doi:10.4467/16890027AP.12.023.0783.
^Yamaguchi M, Mori Y, Kozuka Y, Okada H, Uematsu K, Tame A, Furukawa H, Maruyama T, Worman CO, Yokoyama K (2012). "Prokaryote or eukaryote? A unique microorganism from the deep sea". Journal of Electron Microscopy. 61 (6): 423–431. doi:10.1093/jmicro/dfs062. PMID23024290.