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ANOMOPODA (infraorder)

DAPHNIIDAE, STRAUS 1820 (family)

Second antenna with dorsal branch 3-segmented 
and ventral branch 4-segmented. First antenna 
short, not moveable, head small.

CERIODAPHNIA, DANA 1853  

Rostrum absent. Food algae, bacteria and 
detritus. Big individuals preyed
upon by fish, small individuals preyed 
upon by invertebrate predators.
 

91 a. Head Head in front with a horn. Polymorphic, with or 
without horn on the top of the head. The horned form is 
favored by the presence of fish predators, while the 
unhorned form is favored by a high primary production 
caused by its higher reproduction rate than the horned 
form (Zaret 1972). Size up to 500 μm. 
Planktonic in lakes and ponds. Relatively abundant 
near bottom in shallow lakes (Laguna de Bay). Common.
- Laguna de Bay, Paoay Lake, La Mesa Dam,
  Sampaloc Lake, Bunot Lake, Taal Lake, Tadlac Lake, Lake Lanao.
   Ceriodaphnia cornuta, SARS, 1885
   (syn. Ceriodaphnia rigaudi)
              [1928, 1938c, 1941, 1954, 1978a,b, 1980, 1984, 1986, 2008b]

C. cornuta from Sampaloc Lake	C. cornuta from Laguna de Bay
C. cornuta (Photo: Rey Donne S. Papa, 2007)	C. cornuta (Foto: Rey Donne S. Papa)

91 b. Head without a horn in front.................................92

92 a. Claw on postabdomen with big spines. Head rounded. 
Anal spines in a single row. Size up to 1500 μm. 
In littoral zone of lakes, fishponds and rice fields, 
also in brackish water, up to 5 ppt salinity.
- In the vicinity of Manila. Record not verified!
   Ceriodaphnia reticulata (?) (JURINE, 1820)
              [1928]

92 b. Claw on postabdomen without big spines.

Head inflated and somewhat angular in front of the 
first antenna. Postabdomen with a row of 3 to 4 slender 
spines inner to the other row of spines. Size up to 860 μm.
Planktonic in eutrophic lakes and ponds and in littoral zone. 
Also in brackish water, up to 8 ppt. salinity. Rare.
- Lake Lanao
   Ceriodaphnia pulchella, SARS, 1862
             [1978a,b, 1986]

 

Other Philippine genera in Daphniidae, which accidentally 
can be sampled near the shore. With rostrum present:

Simocephalus, three species, in littoral zone 
on submerged macrophytes  [1978a,b, 1986].

Simocephalus acutirostratus from Laguna de Bay

Scapholeberis, S. kingi, littoral zone 
in ponds and lakes, inhabit the surface layer.
                    [1978a,b, 1986]

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