09-22-2021-1031 - Ancyromonadida Planomonadida biflagellated protists

Ancyromonadida or Planomonadida is a small group of biflagellated protists found in the soil and in aquatic habitats, where they feed on bacteria.^[1][2] 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.^[3]

The group's placement is doubtful, as it seems to fall outside the five supergroups of Eukarya.^[4] Cavalier-Smith considers that they constitute a basal group to Amoebozoa and Opisthokonta and places it together with other related groups in Sulcozoa.^[5]However, they appear more basal than Malawimonas, placing them in Loukouzoa, possibly as stem podiates, and depending on the placement of the root position of the Eukaryotes.^[6][7]

Ancyromonadida
Ancyromonas
Scientific classification
Domain:	Eukaryota
Phylum:	Loukozoa
Order:	Ancyromonadida Cavalier-Smith 1997 emend. Atkins 2000
Family
Ancyromonadidae Planomonadidae
Synonyms
Planomonadida Cavalier-Smith 2008

Phylogeny[edit]

Scotokaryota/Opimoda

Metamonada Cavalier-Smith 1987 emend. Cavalier-Smith 2003       Ancyromonadida Cavalier-Smith 1998 emend. Atkins 2000       Malawimonadea Cavalier-Smith 2003   Podiata   CRuMs[8]   Amorphea   Amoebozoa Lühe 1913 emend. Cavalier-Smith 1998   Obazoa   Breviatea Cavalier-Smith 2004       Apusomonadida Karpov & Mylnikov 1989     Opisthokonta

https://en.wikipedia.org/wiki/Ancyromonadida

Ancyromonas is a basal Eukaryote. It is a flagellate.^[1]

It includes the species Ancyromonas sigmoides.^[2]

Planomonas has been described as a junior synonym of Ancyromonas.^[3] They appear more basal than Malawimonas, placing them in Loukouzoa, possibly relatives of podiates, and depending on the placement of the root position of the Eukaryotes.^[4][5]

Ancyromonas
Ancyromonas sp.
Scientific classification
Domain:	Eukaryota
Phylum:	Loukozoa
Genus:	Ancyromonas Kent 1880
Type species
Ancyromonas sigmoides Kent, 1880
Species
A. abrupta Skvortzov 1957 A. contorta (Klebs 1883) Lemmermann 1914 A. lata Skvortzov 1957 A. magna Zhang & Yang 1993 A. metabolica Skvortzov 1957 A. nitzschiae Skvortzov 1957 A. parasitica Massart A. prima Skvortzov1957 A. rotundata Skvortzov 1957 A. rugosa Skvortzov 1957 A. ruminantium Certes 1899 A. socialis Skvortzov 1957 A. sigmoides Kent 1880 sensu Heiss, Walker & Simpson 2010

Hacrobia Heterokont Alveolata Rhizaria Excavata Amoebozoa Opisthokonta  Animal Fungi)
Diaphoretickes	Archaeplastida Glaucophyta Rhodelphidia Rhodophyta Picozoa Green algae Plantae s.s. Chlorophyta Streptophyta Chlorokybophyceae Mesostigmatophyceae Spirotaenia Cryptista Endohelea Palpitophyta Katablepharidophyta Cryptophyta A+H Alveidia Haptista  Centroheliozoa Haptophyta TSAR SAR Halvaria Alveolata Ciliates Acavomonadia Colponemidia Chromerida Colpodellida Sporozoa Perkinsozoa Dinophyta Stramenopiles (heterokonts) Bicosoecea Developea Hyphochytrea Ochrophyta Peronosporomycota Opalinata Pirsoniomycota Placidozoa Platysulcea Sagenista Rhizaria Filosa Retaria Endomyxa Telonemia
Discoba	Eolouka Jakobea Tsukubea Discicristata Euglenozoa Percolozoa
Loukozoa	Ancyromonadida Malawimonadea Metamonada (Anaeromonada, Trichozoa)
Podiata	Amorphea (unikonts) Amoebozoa Conosa (Archamoebae, Semiconosia) Lobosa (Cutosea, Discosea, Tubulinea) Obazoa Apusomonadida Breviatea Opisthokonta Holomycota Cristidiscoidea Zoosporia  Opisthosporidia True fungi Holozoa Ichthyosporea Pluriformea  Syssomonas Corallochytrea Filozoa Choanoflagellates Filasterea Metazoa or Animals CRuMs Collodictyonidae Mantamonadidae Rigifilida
Hemimastigophora	Spironemidae
Incertae sedis	†Acritarchs †Rangeomorph †Grypania †Gunflint microbiota
Major kingdoms are underlined. See also: protist. Sources and alternative views: Wikispecies.

https://en.wikipedia.org/wiki/Ancyromonas