Ancyromonads
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Ancyromonads
Ancyromonadida or Planomonadida is a small group of biflagellated protists found in the soil and in aquatic habitats, where they feed on bacteria.Cavalier-Smith, T. (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. Includes freshwater or marine organisms, benthic, dorsoventrally compressed and with two unequal flagellae, each emerging from a separate pocket. The apical anterior flagellum can be very thin or end in the cell membrane, while the posterior flagellum is long and is inserted ventrally or laterally. The cell membrane is supported by a thin single layer teak and the mitochondrial crests are discoidal / flat. The group's placement is doubtful, as it seems to fall outside the five supergroups of eukaryotes. Cavalier-Smith considers that they constitute a basal group to Amoebozoa and Opisthokonta and places it together w ...
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Loukozoa
Loukozoa (+ Ancyromonads) (From Greek ''loukos'': groove) is a proposed taxon used in some classifications of eukaryotes, consisting of the Metamonada and Malawimonadea. Ancyromonads are closely related to this group, as sister of the entire group, or as sister of the Metamonada. Amorphea may have emerged in this grouping, specifically as sister of the Malawimonads. Originally, Loukozoa included Anaeromonadea and Jakobea. In 2013, it consisted of three subphyla: Eolouka (Tsukubea and Jakobea), Metamonada and Neolouka (''Malawimonas''). Cavalier-Smith has recently removed Eolouka from Loukozoa, placing it instead in Discoba Excavata is a major supergroup of unicellular organisms belonging to the domain Eukaryota. It was first suggested by Simpson and Patterson in 1999 and introduced by Thomas Cavalier-Smith in 2002 as a formal taxon. It contains a variety of fre .... With the root of the Eukaryota likely close to or in Loukozoa or Discoba, these groupings are studied to giv ...
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Ancyromonas
''Ancyromonas'' is a genus of basal Eukaryote consisting of heterotrophic flagellates. It includes the species ''Ancyromonas sigmoides'', first described by Saville Kent in 1880. The genus was rediscovered in modern times by Hänel in 1979. They are about 5 μm long and live in both marine and freshwater habitats with a global distribution. In 2008, Cavalier-Smith et. al proposed the reassignment of all known species of ''Ancyromonas'' into a new genus, ''Planomonas''. ''Planomonas'' has since been described as a junior synonym of ''Ancyromonas''. ''Ancyromonas'' does not belong to any of the eukaryotic supergroups, and they appear more basal than Malawimonas ''Malawimonas'' is a Loukozoa genus, possible sister of the Podiata. History of the discovery of Malawimonads In 1993, Charles J O’ Kelly studied the jakobid groups flagellates and implications for the early diversification of eukaryotes and ..., placing them in Loukouzoa, possibly relatives of podiates, and dep ...
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Malawimonadea
Malawimonadidae is a group of unicellular eukaryotes of outsize importance in understanding eukaryote phylogeny. Phylogeny Taxonomy * Phylum Neolouka Cavalier-Smith 2013 ** Class Malawimonadea Cavalier-Smith 2003 *** Order Malawimonadida Cavalier-Smith 2003 **** Family Malawimonadidae O’Kelly & Nerad 1999 ***** Genus '' Gefionella'' Heiss, Ekelund & Simpson 2018 ****** Species '' G. okellyi'' Heiss, Ekelund & Simpson 2018 ***** Genus ''Malawimonas ''Malawimonas'' is a Loukozoa genus, possible sister of the Podiata. History of the discovery of Malawimonads In 1993, Charles J O’ Kelly studied the jakobid groups flagellates and implications for the early diversification of eukaryotes and ...'' O’Kelly & Nerad 1999 ****** Species '' M. californiana'' ****** Species '' M. jakobiformis'' O’Kelly & Nerad 1999 References Excavata families {{Excavata-stub ...
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Apusomonadida
The Apusomonadida are a group of protozoan zooflagellates that glide on surfaces, and mostly consume prokaryotes. They are of particular evolutionary interest because they appear to be the sister group to the Opisthokonts, the clade that includes both animals and fungi. Together with the Breviatea, these form the Obazoa clade. Taxonomy * Class Apusomonadea Tedersoo 2017 ** Order Apusomonadida Karpov & Mylnikov 1989 hecomonadales Lee 1989*** Family Apusomonadidae Karpov & Mylnikov 1989 **** Genus ''Amastigomonas'' de Saedeleer 1931 ***** Species '' A. caudata'' Mylnikov 1989 'Amastigomonas borokensis'' Hamar 1979***** Species '' A. debruynei'' de Saedeleer 1931 ***** Species '' A. marisrubri'' Mylnikov & Mylnikov 2012 **** Genus ''Multimonas'' Cavalier-Smith 2010 ***** Species '' M. koreensis'' Heiss et al. 2015 ***** Species '' M. marina'' (Mylnikov 1989) Cavalier-Smith 2010 'Cercomonas marina'' Mylnikov 1989; ''Amastigomonas marina'' (Mylnikov 1989) Mylnikov 1999***** Sp ...
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Breviatea
''Breviata anathema'' is a single-celled flagellate amoeboid eukaryote, previously studied under the name ''Mastigamoeba invertens''. The cell lacks mitochondria but has remnant mitochondrial genes, and possesses an organelle believed to be a modified anaerobic mitochondrion, similar to the mitosomes and hydrogenosomes found in other eukaryotes that live in low-oxygen environments. Early molecular data placed ''Breviata'' in the Amoebozoa, but without obvious affinity to known amoebozoan groups. More recently, phylogenomic analysis has shown that the class Breviatea is a sister group to the Opisthokonta and Apusomonadida. Together, these three groups form the clade Obazoa (the term Obazoa is based on an acronym of Opisthokonta, Breviatea, and Apusomonadida, plus ‘zóa’ (pertaining to ‘life’ in Greek)). Taxonomy * Class Breviatea Cavalier-Smith 2004 rotamoebaeref> ** Order Breviatida Cavalier-Smith 2004 *** Family Breviatidae Cavalier-Smith 2012 **** Genus ''Brevi ...
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