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BOSMINIDAE, BAIRD 1846 (family) 

  

Second antenna with dorsal branch 3-segmented and ventral branch
4-segmented. First antenna fused with the rostrum of head, forming a snout like formation. Feeds on small phytoplankton algae and/or bacteria depending on availability. Preyed upon by invertebrate predators.

BOSMINA, BAIRD 1846.
First antenna not united at base, parallel to each other.
The genus was represented in Taal Lake in a number of 30 individuals/L in December.
- Taal Lake
    Bosmina sp.
      [2005a]

 

Bosmina sp, Taal Lake (Photo: Rey Donne S. Papa, 2007)

 

96 a. Claw on postabdomen proximally with 3-4 long spines increasing in length distally. After these follows 2-6 small spines and 15 very fine spines. Frontal sense hair midway between the junction of first antenna and eye. Size up to 620 μm. Planktonic in lakes. Negatively affected by bloom of green algae Botryococcus braunii blooms in Paoay Lake (Papa et al., 2007a, 2008d).
 Kořínek found only B. fatalis in the 1970-71 Lake Lanao-samples, and this is almost certainly identical with Woltereck's (1941) B. longirostris, se Lewis (1979b). Common.
- Lake Lanao, Paoay Lake.
   Bosmina longirostris (MÜLLER, 1785).
          [1928, 1934, 1938c, 1941, 1969, 1978, 1986, 2003, 2008b,d]

96 b. Claw on postabdomen proximally with 6-8 spines increasing in
length distally, continuing in very fine spines to the tip of the claw. Frontal sense hair near the junction of the first antenna with the head. Size of adult female 370 μm. Shows a remark­able affinity for cryptomonads in Lake Lanao (Lewis 1979b). Planktonic in Lakes. Common. (Figures 96b1, 96b2)
- Laguna de Bay, La Mesa Dam, Sampaloc Lake, Tadlac Lake.
  Naujan Lake, Lake Lanao.
   Bosmina fatalis, BURCHARDT, 1924. 
          [1934 (form philippinensis), 1938c, 1941, 1954, 1978a,b,d,
           1979b, 1980, 1984, 1986]

 

 

 
B. fatalis from Laguna de Bay

B. B. sp (Foto: Rey Donne S. Papa) 

 

 

BOSMINOPSIS, (RICHARD 1895)

      First antenna united at base and diverging
       from each other.

97 a. Only one species. Size 500 μm. In lakes and reservoirs. 
Rare.

      - Laguna de Bay (?), Naujan Lake, Lake Lanao (?).
           Bosminopsis deitersi, RICHARD, 1895
                 [1938c, 1941, 1969, 1974, 1978a,b, 1986]

 

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