As rotifers are common in ponds, the first workers with the microscope observed them repeatedly, the first record being that of John Harris in 1696, who found a Bdelloid in a gallipot that had been standing in his window.
The image of the bdelloid rotifer was exposed using electronic flash.
This statement may seem to need qualification; for the male of no Bdelloid has been seen, and there is but a doubtful record of" winter-eggs in this group. But possibly, as in Seisonaceae, the males resemble the females, and have escaped recognition.