rotifers

1.All bdelloid rotifers are female, and they make embryos without any need for sperm.

所有的蛭形轮都是雌性，而且牠们不需要精子就可以产生胚胎。

2.Competition between the rotifer Brachionus calyciflorus and the cladoceran moina macrocopa in relation to algal food concentration and initial rotifer population density.

温物浓对三品系萼花臂尾轮实验种群态的影响。

3.Take a lineage of microscopic marine animals known as bdelloid rotifers.Most rotifers reproduce sexually, but bdelloid rotifers abandoned sex about 100 million years ago.

就拿海洋中的微小物蛭形轮，大部份轮行有性生殖，但是蛭形轮已经把性丢开约一亿年了。