Bdelloidea

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Bdelloidea

A class of rotifers (wheel animals) found in fresh water and moist soil, which are of interest to scientists because sexual reproduction has disappeared: males do not exist and females reproduce exclusively by parthenogenesis.
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References in periodicals archive ?
GIRL POWER: The bdelloid rotifers lay eggs which turn into clones of the mother
Anhydrobiotic capabilities of bdelloid rotifers. Hydrobiologia, 387/388, 321-326.
Key to the identification of the genera of bdelloid rotifers. Hydrobiologia, 418, 73-80.
Biologists have mused that there might be something funny about the sexual history of bdelloid rotifers, one of the classes of a phylum of little stalk-like water animals crowned with a characteristic circle of hairlike cilia.
The ovaries in bdelloid rotifers, however, create eggs containing the full genome.
Traces of two large families of transposable elements that copy themselves and proliferate when a species reproduces sexually showed up in most of the animals but not in the bdelloid rotifers, the researchers reported in 2000.
Bdelloid rotifers are tiny, freshwater invertebrates that have long puzzled scientists because, as completely asexual animals, they should have been extinguished by parasites and pathogens long ago in evolutionary time.
Microscopic bdelloid rotifers have seemingly evolved without sex for millions of years and probably don't exist in male form, say Harvard University biologists.
One of the strongest candidates for ancient asexuals, bdelloid rotifers date back at least 40 million years.