For the smallest fry these are often rotifers, a phylum of tiny animals discovered in the late 17th century by early microscopists. In particular, farmers use a complex of 15 species known ...

Both 'tardigrades' and 'rotifers' are names of two different phylum, each made up of more than 1,000 species. 'Generally speaking, all animals adapted to frequent irregular drying and freezing ...

The group was long regarded as a distinct phylum, and its evolutionary position ... penis worms and rotifers) on the basis of conflicting studies of physical features 2. Molecular studies have ...