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Alastair G. B. Simpson
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Article
Open AccessAuthor Correction: Genomic analysis finds no evidence of canonical eukaryotic DNA processing complexes in a free-living protist
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Article
Open AccessGenomic analysis finds no evidence of canonical eukaryotic DNA processing complexes in a free-living protist
Cells replicate and segregate their DNA with precision. Previous studies showed that these regulated cell-cycle processes were present in the last eukaryotic common ancestor and that their core molecular parts...
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Article
A natural toroidal microswimmer with a rotary eukaryotic flagellum
We describe Idionectes vortex gen. nov., sp. nov., a unicellular microeukaryote that swims by continuous inversion of its surface, similar to a vortex ring. This previously unreported mode of motility approximate...
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Chapter
Mitochondrion-Related Organelles in Free-Living Protists
Mitochondrion-related organelles (MROs) are organelles that have independently evolved from mitochondria in eukaryotes that live in low-oxygen conditions. These organelles are functionally diverse, possessing ...
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Article
Hemimastigophora is a novel supra-kingdom-level lineage of eukaryotes
Almost all eukaryote life forms have now been placed within one of five to eight supra-kingdom-level groups using molecular phylogenetics1–4. The ‘phylum’ Hemimastigophora is probably the most distinctive morphol...
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Article
Organelles that illuminate the origins of Trichomonas hydrogenosomes and Giardia mitosomes
Many anaerobic microbial parasites possess highly modified mitochondria known as mitochondrion-related organelles (MROs). The best-studied of these are the hydrogenosomes of Trichomonas vaginalis and Spironucleus...
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Book and Reference Work
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Book and Living Reference Work (Continuously updated edition)
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Reference Work Entry In depth
Apusomonadida
Apusomonadida is a small group of free-living heterotrophic flagellates. Apusomonads are small (~5–20 μm long) gliding aerobes with two flagella. The dorsal cell membrane is underlain by a pellicle, which also...
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Living Reference Work Entry In depth
Euglenida
Euglenids are a group of >1500 described species of single-celled flagellates with diverse modes of nutrition, including phagotrophy and photoautotrophy. The group also encompasses a clade of specialist “prima...
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Reference Work Entry In depth
Heterolobosea
Heterolobosea is a group of ~150 described species of heterotrophs, almost all free living. Many are “amoeboflagellates” with a three-phase asexual life cycle, centered on trophic amoebae that can reversibly t...
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Reference Work Entry In depth
Protist Diversity and Eukaryote Phylogeny
The last quarter century has seen dramatic changes in our understanding of the phylogenetic relationships among protist groups and their evolutionary history. This is due in large part to the maturation of mol...
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Living Reference Work Entry In depth
Protist Diversity and Eukaryote Phylogeny
The last quarter century has seen dramatic changes in our understanding of the phylogenetic relationships among protist groups and their evolutionary history. This is due in large part to the maturation of mol...
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Reference Work Entry In depth
Jakobida
Jakobida is a small group (<20 described species) that is related to Heterolobosea and Euglenozoa. Jakobids are free-living heterotrophs with two flagella. They primarily eat prokaryotes that are captured by s...
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Reference Work Entry In depth
Euglenida
Euglenids are a group of >1500 described species of single-celled flagellates with diverse modes of nutrition, including phagotrophy and photoautotrophy. The group also encompasses a clade of specialist “prima...
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Article
Open AccessArginine deiminase pathway enzymes: evolutionary history in metamonads and other eukaryotes
Multiple prokaryotic lineages use the arginine deiminase (ADI) pathway for anaerobic energy production by arginine degradation. The distribution of this pathway among eukaryotes has been thought to be very lim...
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Article
Open AccessErratum to: On the reversibility of parasitism: adaptation to a free-living lifestyle via gene acquisitions in the diplomonad Trepomonas sp. PC1
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Article
Open AccessOn the reversibility of parasitism: adaptation to a free-living lifestyle via gene acquisitions in the diplomonad Trepomonas sp. PC1
It is generally thought that the evolutionary transition to parasitism is irreversible because it is associated with the loss of functions needed for a free-living lifestyle. Nevertheless, free-living taxa are...
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Living Reference Work Entry In depth
Heterolobosea
Heterolobosea is a group of ~150 described species of heterotrophs, almost all free living. Many are “amoeboflagellates” with a three-phase asexual life cycle, centered on trophic amoebae that can reversibly t...
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Living Reference Work Entry In depth
Jakobida
Jakobida is a small group (<20 described species) that is related to Heterolobosea and Euglenozoa. Jakobids are free-living heterotrophs with two flagella. They primarily eat prokaryotes that are captured by s...
