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In this article we will discuss about the structure of daphnia with the help of diagram.
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Fig. 144 DAPHNIA
1. It is the slide of Daphnia.
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2. It is commonly known as “red water flea” and is a cosmopolitan freshwater branchiopod found in ponds and ditches near bottom.
3. It is a minute branchiopod measuring about 2 mm. in length.
4. The body is laterally compressed & s enclosed in a carapace which is transparent and made up of two valves (Bivalve) and is projected behind into a caudal spine. The head is distinct in front of carapace.
5. Segmentation incomplete and reduced.
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6. The round head is bent downwards and is produced into a beak-like rostrum.
7. The head bears a paired, jointed antennae which are used for swimming jerkily.
8. The eyes are sessile and paired in young but fused into one median in adult.
9. The 4-6 pairs of leaf-like trunk appendages are present on 4-6 trunk segments.
10. Abdomen is greatly reduced and is without segmentation and appendages.
11. Sexes are separate.
12. There is present a large brood pouch in female, which carries eggs and embryos.
