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ARTHROPODA, Arthropods (phylum) 

CRUSTACEA, Crustaceans (class)

BRANCHIOPODA, Branchiopods (subclass).

DIPLOSTRACA, GERSTEACKER 1866 (order)

CLADOCERA, Water fleas, Latreille, 1829.  (suborder)

Bivalved shell (Carapace) covers the body but leaves
the head free. Second antenna with dorsal branch (exipodite) and ventral branch (endopodite). Six pairs of legs of similar structure.Legs leaf-like. Size 200-1500 μm.
Filtrators, with filter setae on the legs. Food:
Algae, bacteria and detritus.

 

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Key to the families of Philippine water fleas.

      (Key to genera and species à 83)  

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78 a. Second antenna with dorsal branch (exipodite) 
2-segmented and ventral branch (endopodite) 
3-segmented. Six pairs of legs of 
similar structure.......................................SIDIDAE

 

Diaphanosoma sp.

 

78 b. Second antenna with dorsal branc 3-segmented and 
ventral branch 3- or 4-segmented. 
Five or six pairs of legs of different structure..............79

 

79 a. First antenna fused with the rostrum, forming a snout like formation.............................................BOSMINIDAE

Bosmina sp.

79 b. First antenna not fused with rostrum...........................80

 

80 a. One branch of antenna 3-segmented, the other 4-segmented.......81

 

80 b. Both branches of antennae 3-segmented..................CHYDORIDAE

 

Chydorus sp.

81 a. First antenna short, immobile..........................DAPHNIIDAE

Ceriodaphnia sp.

81 b. First antenna long, mobile.....................................82

 

82 a. First antenna situated on ventral side of the head.......MOINIDAE

Moina sp.

82 b. First antenna situated on anterior margin of head...MACROTRICIDAE

 

Macrothrix sp.

To 83a