Heterolobosea

Pánek, Tomáš; Simpson, Alastair G. B.; Brown, Matthew W.; Dyer, Betsey Dexter

doi:10.1007/978-3-319-28149-0_10

Cited by 15 publications

(23 citation statements)

References 154 publications

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“…; Pánek et al. , , ; Park and Simpson ). The other concept of Heterolobosea, referred to here as “Heterolobosea sensu stricto,” recognizes Heterolobosea in the narrow sense established by Page and Blanton ().…”

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confidence: 98%

“…Although Heterolobosea is not a particularly species‐rich group, consisting of approximately 140 species in 35 genera (see Pánek et al. ), the boundaries of its true diversity continue to expand, as indicated by discoveries of a considerable number of new genera during the last decade (Anderson et al. ; De Jonckheere et al.…”

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confidence: 99%

“…Members of Heterolobosea are typically amoeboflagellates that alternate between amoeba and flagellate stages during the life cycle (Pánek et al. ). However, one or the other of these stages has been lost or is unknown in a number of taxa.…”

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confidence: 99%

“…140 species in 8 families), and morphology of its members is more derived than that of Pharyngomonas (see Pánek et al. ).…”

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confidence: 99%

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Dactylomonas gen. nov., a Novel Lineage of Heterolobosean Flagellates with Unique Ultrastructure, Closely Related to the Amoeba Selenaion koniopes Park, De Jonckheere & Simpson, 2012

Hanousková

Táborský

Čepička

2018

J Eukaryotic Microbiology

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We report the discovery of a new genus of heterolobosean flagellates, Dactylomonas gen. nov., with two species, D. venusta sp. nov. and D. crassa sp. nov. Phylogenetic analysis of the SSU rRNA gene showed that Dactylomonas is closely related to the amoeba Selenaion, the deepest-branching lineage of Tetramitia. Dactylomonads possess two flagella, and ultrastructural studies revealed an unexpected organization of the flagellar apparatus, which resembled Pharyngomonada (the second lineage of Heterolobosea) instead of Tetramitia: basal bodies were orthogonal to each other and a putative root R1 was present in the mastigont. On the other hand, Dactylomonas displayed several features uncommon in Heterolobosea: a microtubular corset, a distinctive rostrum supported by the main part of the right microtubular root, a finger-like projection on the proximal part of the recurrent flagellum, and absence of a ventral groove. In addition, Dactylomonas is anaerobic and seems to have lost mitochondrial cristae. Dactylomonas and Selenaion are accommodated in the family Selenaionidae fam. nov. and order Selenionida ord. nov. The taxonomy of Tetramitia is partially revised, and the family Neovahlkampfiidae fam. nov. is established.

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confidence: 98%

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confidence: 99%

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confidence: 99%

“…140 species in 8 families), and morphology of its members is more derived than that of Pharyngomonas (see Pánek et al. ).…”

mentioning

confidence: 99%

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Dactylomonas gen. nov., a Novel Lineage of Heterolobosean Flagellates with Unique Ultrastructure, Closely Related to the Amoeba Selenaion koniopes Park, De Jonckheere & Simpson, 2012

Hanousková

Táborský

Čepička

2018

J Eukaryotic Microbiology

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“…Protists isolated from this environment have been rarely detected in freshwater or marine habitats and usually represent novel eukaryotic lineages, some of them relatively deep‐branching (Harding and Simpson ; Pánek et al. ; Park and Simpson ). The isolates from hypersaline waters are classified as the heterotrophic Bicosoecida (i.e.…”

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confidence: 99%

A New Halophilic Heterolobosean Flagellate, Aurem hypersalina gen. n. et sp. n., Closely Related to the Pleurostomum‐Tulamoeba Clade: Implications for Adaptive Radiation of Halophilic Eukaryotes

Jhin

Park

2018

J Eukaryotic Microbiology

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Halophilic protozoa are independently scattered across the molecular phylogeny of eukaryotes; most of which are assigned to Heterolobosea. Here, we isolated a biflagellate from a hypersaline water of 342‰ salinity. This isolate shared several morphological features with typical halophilic heterolobosean flagellates. In addition, molecular phylogenetic trees of the 18S rRNA gene sequences clearly indicated flagellate is a heterolobosean species closely related to the halophilic Tulamoebidae. However, the flagellate was not accommodated to any described genus. Cells were ovoid-shaped, and no amoebae were observed. The two unequal flagella beat heterodynamically. An ear-like bulge at the margin of a cytostomal groove was observed. Flagellates could grow at 100-200‰ salinity, suggesting an obligately halophilic species. Currently, it appears that the new halophilic Aurem hypersalina forms a strong clade with Tulamoebidae, and is sister to the Tulamoebidae, indicating that this new clade is composed almost entirely of obligate halophilic taxa. Thus, A. hypersalina and the Tulamoebidae clade currently represent a unique adaptive radiation of halophilic eukaryotes.

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Mitochondrion-Related Organelles in Free-Living Protists

Leger

Kolísko

Stairs

et al. 2019

Microbiology Monographs

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Mitochondrion-related organelles (MROs) are a set of functionally diverse organelles that have independently evolved from mitochondria in eukaryotes that live in low-oxygen conditions. These organelles are functionally diverse, possessing a range of ancestrally mitochondrial or horizontally-acquired biochemical pathways. Early studies of MROs focused mainly on parasitic organisms; however, the past decade has seen a growing body of work on the MROs of free-living eukaryotes based on comparative genomics, making it possible to tease apart adaptations to low-oxygen conditions from adaptations to parasitism. Here, we review current knowledge of MROs in free-living eukaryotes. 2

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Heterolobosea

Cited by 15 publications

References 154 publications

Dactylomonas gen. nov., a Novel Lineage of Heterolobosean Flagellates with Unique Ultrastructure, Closely Related to the Amoeba Selenaion koniopes Park, De Jonckheere & Simpson, 2012

Dactylomonas gen. nov., a Novel Lineage of Heterolobosean Flagellates with Unique Ultrastructure, Closely Related to the Amoeba Selenaion koniopes Park, De Jonckheere & Simpson, 2012

A New Halophilic Heterolobosean Flagellate, Aurem hypersalina gen. n. et sp. n., Closely Related to the Pleurostomum‐Tulamoeba Clade: Implications for Adaptive Radiation of Halophilic Eukaryotes

Mitochondrion-Related Organelles in Free-Living Protists

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