Editing Rotifer (section)

===Loss of sexual reproduction system===
''''Ancient asexuals':''' [[Bdelloid]] rotifers are assumed to have reproduced without sex for many millions of years. Males are absent within the species, and females reproduce only by [[parthenogenesis]].

However, a new study provided evidence for interindividual genetic exchange and recombination in ''[[Adineta]] vaga'', a species previously thought to be anciently asexual.<ref>{{cite journal |author=Vakhrusheva, O.A. |author2=Mnatsakanova, E.A. |author3=Galimov, Y.R. |display-authors=etal|title=Genomic signatures of recombination in a natural population of the bdelloid rotifer Adineta vaga |date=18 December 2020|journal=Nature|volume=11 |issue=1 |page=6421 |doi=10.1038/s41467-020-19614-y |pmid=33339818 |pmc=7749112 |bibcode=2020NatCo..11.6421V }}</ref>

'''Recent transitions:''' Loss of [[sexual reproduction]] can be inherited in a simple [[Mendelian inheritance|Mendelian fashion]] in the monogonont rotifer ''[[Brachionus calyciflorus]]'': This species can normally switch between sexual and asexual reproduction (cyclical parthenogenesis), but occasionally gives rise to purely asexual lineages (obligate parthenogens). These lineages are unable to reproduce sexually due to being homozygous for a recessive allele.<ref>{{cite journal |author=Claus-Peter Stelzer |author2=Johanna Schmidt |author3=Anneliese Wiedlroither |author4=Simone Riss |date=20 September 2010 |title=Loss of sexual reproduction and dwarfing in a small metazoan |journal=[[PLoS ONE]] |volume=5 |issue=9 |pages=e12854 |doi=10.1371/journal.pone.0012854 |pmid=20862222 |pmc=2942836|bibcode=2010PLoSO...512854S |doi-access=free }}</ref>