Fig. 7.4.

   Cladocerans: (A) Bosmina meridionalis – small body. First antennae (FA) relatively long, slender, not fused at their bases. Second antennae (SA) relatively small. Often a pair of spine-like elongation (S) at ventro-posterior corner of body. Scale bar 100 µm; (B) Acroperus sp. – body flattened laterally. Bottom dwelling. Normally found among water plants. Scale bar 100 µm; (C) Ceriodaphnia sp. – body shape broadly oval. Head (H) small. Short first antennae (FA). Normal eggs (E). Scale bar 200 µm; (D) Chydorus sp. – body small, spherical. Small eyes (E). Bottom dwelling, but also appears in plankton. Scale bar 100 µm; (E) Diaphanosoma excisum – body without a tail spine. Head relatively large, rectangular with large eye (EY). First antennae small (FA) small. Second antennae (SA) large and well developed. Large normal egg (E). Scale bar 300 µm; (F) Macrothrix spinosa – body flattened laterally, without tail spine. First antennae (FA) situated frontal side of head. Tip of first antennae (T) wider than its base (B). Bottom dwelling. Normally found among water plants. Scale bar 100 µm.