Archigregarines of the English Channel revisited: New molecular data on Selenidium species including early described and new species and the uncertainties of phylogenetic relationships

PloS One
Sonja Rueckert, Aleš Horák

Abstract

Gregarines represent an important transition step from free-living predatory (colpodellids s.l.) and/or photosynthetic (Chromera and Vitrella) apicomplexan lineages to the most important pathogens, obligate intracellular parasites of humans and domestic animals such as coccidians and haemosporidians (Plasmodium, Toxoplasma, Eimeria, Babesia, etc.). While dozens of genomes of other apicomplexan groups are available, gregarines are barely entering the molecular age. Among the gregarines, archigregarines possess a unique mixture of ancestral (myzocytosis) and derived (lack of apicoplast, presence of subpellicular microtubules) features. In this study we revisited five of the early-described species of the genus Selenidium including the type species Selenidium pendula, with special focus on surface ultrastructure and molecular data. We were also able to describe three new species within this genus. All species were characterized at morphological (light and scanning electron microscopy data) and molecular (SSU rDNA sequence data) levels. Gregarine specimens were isolated from polychaete hosts collected from the English Channel near the Station Biologique de Roscoff, France: Selenidium pendula from Scolelepis squamata, S. hollandei a...Continue Reading

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Citations

Mar 17, 2020·Biology of the Cell·Julie Boisard, Isabelle Florent
Jul 28, 2019·Trends in Parasitology·Sonja RueckertAnastasios D Tsaousis
Sep 11, 2019·Current Biology : CB·Sonja RueckertJoel B Dacks

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Datasets Mentioned

BETA
MF882901
MF882899
MI-PR135
MI-PR136

Methods Mentioned

BETA
electron microscopy
scanning electron microscopy
PCR

Software Mentioned

Consel
Adobe Photoshop
BLAST
RAxML
trimAl
MAFFT
Puzzle
Tree
SEAVIEW
Phylobayes

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