Collodictyon triciliatum and Diphylleia rotans (= Aulacomonas submarina) Form a New Family of Flagellates (Collodictyonidae) with Tubular Mitochondrial Cristae that is Phylogenetically Distant from other Flagellate Groups

Brugerolle, Guy; Bricheux, Geneviève; Piégay, Hervé; Coffe, Gérard

doi:10.1078/1434-4610-00083

Cited by 37 publications

(29 citation statements)

References 29 publications

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“…These similarities also make the biciliate Malawimonas a much better model for the ancestor of Metamonada than the quadriciliate Collodictyon (now in Apusozoa rather than Loukozoa). The extra centrioles in Collodictyon are in the same position as the two younger centrioles normally made prior to cell division (Brugerolle et al, 2002), so its quadriciliate condition may have evolved simply by the accelerated development of cilia from them. The lateral cilia of Trimastix, probably the ancestral state for Metamonada, probably originated similarly but independently.…”

Section: Tetrakontymentioning

confidence: 99%

The excavate protozoan phyla Metamonada Grasse emend. (Anaeromonadea, Parabasalia, Carpediemonas, Eopharyngia) and Loukozoa emend. (Jakobea, Malawimonas): their evolutionary affinities and new higher taxa

Cavalier‐Smith

2003

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLO

103

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It is argued here that the anaerobic protozoan zooflagellate Parabasalia, Carpediemonas and Eopharyngia (diplomonads, enteromonads, retortamonads) constitute a holophyletic group, for which the existing name Trichozoa is adopted as a new subphylum. Ancestrally, Trichozoa probably had hydrogenosomes, stacked Golgi dictyosomes, three anterior centrioles and one posterior centriole: the typical tetrakont pattern. It is also argued that the closest relatives of Trichozoa are Anaeromonada (Trimastix, oxymonads), and the two groups are classified as subphyla of a revised phylum Metamonada. Returning Parabasalia and Anaeromonadea to Metamonada, as in Grassé 's original classification, simplifies classification of the kingdom Protozoa by reducing the number of phyla within infrakingdom Excavata from five to four. Percolozoa (Heterolobosea plus Percolatea classis nov.) and Metamonada are probably both ancestrally quadriciliate with a kinetid of four centrioles attached to the nucleus; the few biciliates among them are probably secondarily derived. Metamonada ancestrally probably had two divergent centriole pairs, whereas, in Percolozoa, all four centrioles are parallel. It is suggested that Discicristata (Percolozoa, Euglenozoa) are holophyletic, ancestrally with two parallel centrioles. In the phylum Loukozoa, Malawimonadea classis nov. is established for Malawimonas (with a new family and order also) and Diphyllatea classis nov., for Diphylleida (Diphylleia, Collodictyon), is transferred back to Apusozoa. A new class, order and family are established for the anaerobic, biciliate, tricentriolar Carpediemonas, transferring it from Loukozoa to Trichozoa because of its triply flanged cilia; like Retortamonas, it may be secondarily biciliate -its unique combination of putative hydrogenosomes and flanged cilia agree with molecular evidence that Carpediemonas is sister to Eopharyngia, diverging before their ancestor lost hydrogenosomes and acquired a cytopharynx. Removal of anaeromonads and Carpediemonas makes Loukozoa more homogeneous, being basically biciliate, aerobic and free-living, in contrast to Metamonada. A new taxon-rich rRNA tree supports holophyly of Discicristata and Trichozoa strongly, holophyly of Metamonada and Excavata and paraphyly of Loukozoa weakly. Mitochondria were probably transformed into hydrogenosomes independently in the ancestors of lyromonad Percolozoa and Metamonada and further reduced in the ancestral eopharyngian. Evidence is briefly discussed that Metamonada and all other excavates share a photosynthetic ancestry with Euglenozoa and are secondarily non-photosynthetic, as predicted by the cabozoan hypothesis for a single secondary symbiogenetic acquisition of green algal plastids by the last common ancestor of Euglenozoa and Cercozoa. Excavata plus core Rhizaria (Cercozoa, Retaria) probably form an ancestrally photophagotrophic clade. The origin from a benthic loukozoan ancestor of the characteristic cellular features of Percolozoa and Euglenozoa through divergent adaptations for feeding on or ...

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Section: Tetrakontymentioning

confidence: 99%

The excavate protozoan phyla Metamonada Grasse emend. (Anaeromonadea, Parabasalia, Carpediemonas, Eopharyngia) and Loukozoa emend. (Jakobea, Malawimonas): their evolutionary affinities and new higher taxa

Cavalier‐Smith

2003

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLO

103

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“…Collodictyonids (diphylleiids) are free-living predatory flagellates with two or four anteriorly directed flagella that insert at the anterior end of a broad ventral groove (Brugerolle et al, 2002). This groove is used to ingest prey, but feeding is raptorial.…”

Section: Unrelated Groove-bearing Cellsmentioning

confidence: 99%

“…This dataset also includes the collodictyonid Diphylleia (Brugerolle et al, 2002), which turns out not to be strongly related to any excavate group (Fig. 6).…”

Section: Molecular Approachesmentioning

confidence: 99%

Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota)

Simpson

2003

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLO

200

264

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“…2), although its true phylogenetic affiliation is currently unsettled. [23][24][25][26] Like its homologs in other taxa, the DYW domain found in Malawimonas jakobiformis EST EC721053 (Fig. 1B) retains all highly conserved sequence motifs including universal positions that are likely indispensable for deaminase functionality.…”

Section: Dyw-type Ppr Protein Genes Exist In At Least Four Eukaryoticmentioning

confidence: 99%

A survey of PPR proteins identifies DYW domains like those of land plant RNA editing factors in diverse eukaryotes

Schallenberg‐Rüdinger

Lenz

Polsakiewicz

et al. 2013

RNA Biology

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Collodictyon triciliatum and Diphylleia rotans (= Aulacomonas submarina) Form a New Family of Flagellates (Collodictyonidae) with Tubular Mitochondrial Cristae that is Phylogenetically Distant from other Flagellate Groups

Cited by 37 publications

References 29 publications

The excavate protozoan phyla Metamonada Grasse emend. (Anaeromonadea, Parabasalia, Carpediemonas, Eopharyngia) and Loukozoa emend. (Jakobea, Malawimonas): their evolutionary affinities and new higher taxa

The excavate protozoan phyla Metamonada Grasse emend. (Anaeromonadea, Parabasalia, Carpediemonas, Eopharyngia) and Loukozoa emend. (Jakobea, Malawimonas): their evolutionary affinities and new higher taxa

Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota)

A survey of PPR proteins identifies DYW domains like those of land plant RNA editing factors in diverse eukaryotes

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