Evosea
Dictyostelium discoideum
Scientific classification Edit this classification
Domain: Eukaryota
Phylum: Amoebozoa
Clade: Evosea
Kang et al. 2017[1]
Clades[1][2]

Evosea is a diverse clade of amoeboid protists discovered through molecular analyses. Along with Tubulinea and Discosea, Evosea is one of the three major groups within Amoebozoa, an important clade of eukaryotic organisms. It contains unicellular organisms that display a wide variety of life cycles and cell shapes, including amoebae, flagellates and different kinds of slime molds.

Characteristics

Evosea is a strongly supported clade of eukaryotes containing four large groups of amoebozoans: Eumycetozoa or "true" slime molds,[3] Variosea, Cutosea and Archamoebae. It is defined on a node-based approach as the least-inclusive clade containing Dictyostelium discoideum (a true slime mold), Protostelium nocturnum (a variosean), Squamamoeba japonica (a cutosean), and Entamoeba histolytica (an archamoeba).[1]

Within Evosea, organisms can vary across almost the entire range of morphologies seen in Amoebozoa. Many members have complex life cycles that include amoebae, flagellates and fruiting stages. Some species appear to be exclusively flagellates, with no amoeboid features.[2]

Taxonomy

Evosea is a clade discovered in 2017 through a phylogenomic study by Senghuo Kang and coauthors, published in the journal Molecular Biology and Evolution.[1] Since its discovery, it has been supported by independent analyses.[4][5][6] As of 2019, it is accepted by the International Society of Protistologists as part of the modern cladistic classification of eukaryotes.[2] The name 'Evosea' is partly an acronym of the major members of the clade: Eumycetozoa (E), Variosea (v), Squamamoebidae and Sapocribridae (s), and Archamoebae (a).[1]

Evolution

Evosea is composed of two sister clades: Cutosea, a small group of solitary amoebae, and Conosa, a larger group that contains the archamoebae, true slime molds and Variosea. Evosea, along with Tubulinea and Discosea, compose the entirety of Amoebozoa. The branching order of these three basal groups is still unresolved: either Evosea groups with Tubulinea (in a clade known as Tevosa),[1] or with Discosea (in a clade called Divosa). The following cladogram is based on a 2022 analysis, which resulted in the Divosa hypothesis:[6]

Amorphea
Amoebozoa

Tubulinea

Discosea

Evosea
Cutosea

Squamamoebidae

Sapocribridae

Conosa

Archamoebae

Eumycetozoa

Variosea

Obazoa

References

  1. 1 2 3 4 5 6 Kang, Seungho; Tice, Alexander K; Spiegel, Frederick W; Silberman, Jeffrey D; Pánek, Tomáš; Čepička, Ivan; Kostka, Martin; Kosakyan, Anush; Alcântara, Daniel M C; Roger, Andrew J; Shadwick, Lora L; Smirnov, Alexey; Kudryavtsev, Alexander; Lahr, Daniel J G; Brown, Matthew W (September 2017). "Between a Pod and a Hard Test: The Deep Evolution of Amoebae". Molecular Biology and Evolution. 34 (9): 2258–2270. doi:10.1093/molbev/msx162. PMC 5850466. PMID 28505375.
  2. 1 2 3 Adl SM, Bass D, Lane CE, Lukeš J, Schoch CL, Smirnov A, Agatha S, Berney C, Brown MW, Burki F, Cárdenas P, Čepička I, Chistyakova L, del Campo J, Dunthorn M, Edvardsen B, Eglit Y, Guillou L, Hampl V, Heiss AA, Hoppenrath M, James TY, Karnkowska A, Karpov S, Kim E, Kolisko M, Kudryavtsev A, Lahr DJG, Lara E, Le Gall L, Lynn DH, Mann DG, Massana R, Mitchell EAD, Morrow C, Park JS, Pawlowski JW, Powell MJ, Richter DJ, Rueckert S, Shadwick L, Shimano S, Spiegel FW, Torruella G, Youssef N, Zlatogursky V, Zhang Q (2019). "Revisions to the Classification, Nomenclature, and Diversity of Eukaryotes". Journal of Eukaryotic Microbiology. 66 (1): 4–119. doi:10.1111/jeu.12691. PMC 6492006. PMID 30257078.
  3. ↑ Wijayawardene, Nalin; Hyde, Kevin; Al-Ani, LKT; Dolatabadi, S; Stadler, Marc; Haelewaters, Danny; Tsurykau, Andrei; Mesic, Armin; Navathe, Sudhir; Papp, Viktor; Oliveira Fiuza, Patrícia; Vázquez, Víctor; Gautam, Ajay; Becerra, Alejandra G.; Ekanayaka, Anusha; K. C., Rajeshkumar; Bezerra, Jadson; Matočec, Neven; Maharachchikumbura, Sajeewa; Suetrong, Satinee (2020). "Outline of Fungi and fungus-like taxa". Mycosphere. 11: 1060–1456. doi:10.5943/mycosphere/11/1/8. hdl:10481/61998.
  4. ↑ Wang, Fang; Tekle, Yonas I. (August 2022). "Variation of natural selection in the Amoebozoa reveals heterogeneity across the phylogeny and adaptive evolution in diverse lineages". Frontiers in Ecology and Evolution. Evolutionary and Population Genetics. 10: 851816. doi:10.3389/fevo.2022.851816. PMC 9980437. PMID 36874909.
  5. ↑ Tice, Alexander K.; Spiegel, Frederick W.; Brown, Matthew W. (February 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. PMID 36825799. S2CID 257153791.
  6. 1 2 Tekle YI, Wang F, Wood FC, Anderson OR, Smirnov A (2022). "New insights on the evolutionary relationships between the major lineages of Amoebozoa". Sci Rep. 12 (11173): 11173. Bibcode:2022NatSR..1211173T. doi:10.1038/s41598-022-15372-7. PMC 9249873. PMID 35778543. S2CID 247231712.
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