Fig. 7.2.

   Rotifers: (A) Asplanchna priodonta – foot absent. Body transparent. Specimen preserved in formalin often strongly contracts. Jaw (trophus) needs to be examined for identification of species. Scale bar 100 µm; (B) Brachionus calyciflorus amphiceros – four anterior spines (AS) on dorsal side of lorica. Long posterior spines (PS). Scale bar 50 µm; (C) Cephalodella gibba – body fusiform, with slender toes (T); (D) Filinia longiseta – body shape oval. Body with two long lateral bristles (LB) and one short posterior bristle (PB). Scale bar 100 µm; (E) Keratella tropica – three six-sided median plaques (MP) on dorsal side of lorica. Single small four-sided posterior plaque (PP). Scale bar 50 µm; (F) Trichocera chattoni – body cylindrical, more or less squat. Single long curved spine (S) at margin of head opening. Scale bar 100 µm; (G) Trichotriatruncata – head, body and foot segments distinctive and rigid. Lorica margin with small spines (S). Scale bar 50 µm.