Noun
One of the Rotifera. See Illust. in Appendix.
Source: Webster's dictionaryThere are around 129 freshwater invertebrates, the majority being rotifer ; however, the identification of some species remains in dispute. Source: Internet
They are possibly closer to the two rotifer classes Bdelloidea and Monogononta than to the other class, Seisonidea, producing the names and relationships shown in the cladogram below. Source: Internet