Obazoa

Proposed group of single-celled organisms

Obazoa Temporal range: Late Stenian - Present, 1010–0 Ma Pha. Proterozoic Archean Had.

A Clockwise, from top left: Abeoforma whisleri (Ichthyosporea); Amanita muscaria (Fungi); Desmarella moniliformis (Choanoflagellatea); Bonnet Macaque (Animalia); Nuclearia thermophila (Nucleariida); Amoeba proteus (Amoebozoa)
Scientific classification Edit this classification
Domain:	Eukaryota
Clade:	Amorphea
Clade:	Obazoa Brown et al., 2013^[1]
Clades
Breviatea Apusomonadidae Opisthokonta sister: Amoebozoa

Obazoa is a proposed sister clade of Amoebozoa (which together form Amorphea). The term Obazoa is based on the OBA acronym for Opisthokonta, Breviatea, and Apusomonadidae, the group's three constituent clades.^[1]

Determining the placement of Breviatea and Apusomonadida and their properties is of interest for the development of the opisthokonts in which the main lineages of animals and fungi emerged.^[1] The relationships among opisthokonts, breviates and apusomonads are not conclusively resolved (as of 2018), though Breviatea is usually inferred to be the most basal of the three lineages.^[2]^[3]^[4]^[5]^[6]

The phylogeny of the Obazoa is shown in the cladogram.^[6]^[7]^[8]^[9]

Eukaryotes

Diphoda

Diaphoretickes (inc. plants)

Bikonts

Podiata

Amorphea

Obazoa

Opisthokonta

Holomycota (inc. fungi)

Holozoa (inc. animals)

1300 mya

1500 mya

2200 mya

References

[edit ]

^ ^a ^b ^c Brown, M.W.; Sharpe, S.C.; Silberman, J.D.; Heiss, A.A.; Lang, B.F.; Simpson, A.G.B.; Roger, A.J. (2013). "Phylogenomics demonstrates that breviate flagellates are related to opisthokonts and apusomonads". Proceedings of the Royal Society B: Biological Sciences . 280 (1769) 20131755. doi:10.1098/rspb.2013.1755 . JSTOR 43601549. OCLC 8093015610. PMC 3768317 . PMID 23986111. S2CID 19627175 .
^ Eme, Laura; Sharpe, Susan C.; Brown, Matthew W.; Roger, Andrew J. (2014). "On the Age of Eukaryotes: Evaluating Evidence from Fossils and Molecular Clocks". Cold Spring Harbor Perspectives in Biology. 6 (8) a016139. doi:10.1101/cshperspect.a016139. ISSN 1943-0264. PMC 4107988 . PMID 25085908.
^ Ruggiero, Michael A.; Gordon, Dennis P.; Orrell, Thomas M.; Bailly, Nicolas; Bourgoin, Thierry; Brusca, Richard C.; Cavalier-Smith, Thomas; Guiry, Michael D.; Kirk, Paul M. (2015年06月11日). "Correction: A Higher Level Classification of All Living Organisms". PLOS ONE. 10 (6) e0130114. Bibcode:2015PLoSO..1030114R. doi:10.1371/journal.pone.0130114 . ISSN 1932-6203. PMC 5159126 . PMID 26068874.
^ Cavalier-Smith, Thomas; Fiore-Donno, Anna Maria; Chao, Ema; Kudryavtsev, Alexander; Berney, Cédric; Snell, Elizabeth A.; Lewis, Rhodri (2015年02月01日). "Multigene phylogeny resolves deep branching of Amoebozoa". Molecular Phylogenetics and Evolution. 83: 293–304. doi:10.1016/j.ympev.2014年08月01日1 . PMID 25150787.
^ Cavalier-Smith T (2009). "Megaphylogeny, cell body plans, adaptive zones: causes and timing of eukaryote basal radiations". J. Eukaryot. Microbiol. 56 (1): 26–33. doi:10.1111/j.1550-7408.2008.00373.x . PMID 19340985.
^ ^a ^b Brown, M.W.; Heiss, A.A.; Kamikawa, R.; Inagaki, Y.; Yabuki, A.; Tice, A.K.; Shiratori, T.; Ishida, K.-I.; Hashimoto, T.; Simpson, A.G.B.; Roger, A.J. (2018). "Phylogenomics Places Orphan Protistan Lineages in a Novel Eukaryotic Super-Group". Genome Biology and Evolution . 10 (2): 427–433. bioRxiv 10.1101/227884 . doi:10.1093/gbe/evy014 . OCLC 7315371047. PMC 5793813 . PMID 29360967. S2CID 46757580 .
^ Schön ME, Zlatogursky VV, Singh RP, et al. (2021). "Picozoa are archaeplastids without plastid". Nature Communications. 12 (1): 6651. bioRxiv 10.1101/2021.04.14.439778 . doi:10.1038/s41467-021-26918-0. PMC 8599508 . PMID 34789758. S2CID 233328713.
^ Tikhonenkov DV, Mikhailov KV, Gawryluk RM, et al. (December 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. PMID 36477531. S2CID 254436650.
^ Burki, Fabien; Roger, Andrew J.; Brown, Matthew W.; Simpson, Alastair G.B. (2020). "The New Tree of Eukaryotes". Trends in Ecology & Evolution. 35 (1). Elsevier: 43–55. doi:10.1016/j.tree.201908008 . ISSN 0169-5347. PMID 31606140. S2CID 204545629.

v
t
e

Eukaryote classification

(major groups

Amoebozoa	Discosea Tubulinea Variosea Archamoebea Cutosea Eumycetozoa (true slime molds)

Obazoa

Opisthokonta

Holomycota	Rotosphaerida Fungi 1

Holozoa

Filozoa

Filasterea
Choanozoa	Choanoflagellata Animalia (animals) 1

Diaphoretickes

Telonemia

Haptista

SAR

Rhizaria

Cercozoa
Endomyxa
Retaria
- Foraminifera
- Radiolaria *

Alveolata

Colponemida * Ciliophora (ciliates)
Myzozoa	Apicomplexa Chrompodellida Dinoflagellata Perkinsozoa

Stramenopiles

Platysulcus Kaonashia Commation
Bigyra *	Bicosoecida Placidozoa Sagenista
Gyrista	Developea Pirsoniales Hyphochytriomycetes Ochrophyta (brown algae, diatoms and relatives) Oomycetes (water molds) Actinophryida

CAM

Pancryptista

Microheliella
Cryptista	Palpitomonas Katablepharidida Cryptomonada

Archaeplastida
(plants sensu lato)

Viridiplantae
(green plants or
plants sensu stricto)

Prasinodermophyta
Chlorophyta

Streptophyta	Mesostigmatophyceae Chlorokybophyceae Spirotaenia Klebsormidiophyceae Charophyceae Coleochaetophyceae Zygnematophyceae *Embryophyta (land plants or plants sensu strictissimo)* 1

"Excavates"*

Discoba

Jakobea Tsukubamonas
Discicristata	Heterolobosea Euglenozoa

Metamonada *

Malawimonadida

Incertae sedis

Provora	Nebulidia Nibbleridia
Hemimastigophora	Spironematellidae Paramastigidae
Ancyromonadida	Ancyromonadidae Planomonadidae Divimonas
CRuMs	Diphylleida Mantamonadida Rigifilida Glissandrida
Genera of uncertain affiliation	Acinetactis Actinastrum Berkeleyaesol Kamera Magosphaera Meringosphaera Meteora Parakaryon (?) Quasibodo Tetrahelia
Acritarchs and other fossils	†Algospongia †Archaeochaeta †Cephalonyx †Changchengia †Cheleutochroa †Chitinozoa †Coryphidium †Cucumiforma †Dictyosphaera †Diskagma (?) †Eosolena †Francevillian biota (?) †Germinosphaera †Grandilingulata †Granomarginata †Grypania †Gunflint microbiota †Horodyskia †Introvertocystis †Korilophyton †Leiosphaeridia †Navifusa †Portalites †Protosterol biota †Pterospermopsimorpha †Qingshania †Quadrisporites †Schizofusa †Shuiyousphaeridium †Simia †Tappania †Tawuia (?) †Tetraporina †Thuchomyces (?) †Tuanshanzia †Valeria †Vernanimalcula

1non-protist groups
*possibly paraphyletic groups
bold denotes groups with over 1,000 species
Taxonomy of protists

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