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132 a. The membrane connecting the bases of the fourth pair
of legs (swimming feet) has two rounded processes, with a number of small spines on. Caudal branch 3 times as long as wide. Longest terminal setae not curved. Longest setae not curved. Receptaculum seminis with thin head. In freshwater. Abdomen covered with small dots in rows. Size of female 900-1000 μm.
- Manila area
   Thermocyclops philippinensis (MARSH, 1932)

          (syn. Mesocyclops Thermocyclops philippinensis,
    syn. Thermocyclops conspicuus LINDBERG, 1947, from Indien)

                    [1932, 1986c]

132 b. The membrane connecting the base of the fourth pair of legs (swimming feet) has two high and slime outgrowth with bigger spines on. Caudal branch 2½ times as long as wide. Longest setae not curved. Receptaculum seminis with thin head. Size of female 760-790 μm. Planktonic in alkaline lakes and reservoirs.
- Naujan Lake
   Thermocyclops decipiens, (KIEFER, 1938)
             [1938a, 1941]

 

132 c. 132 b. In Lake Mainit is found a fourth species, different from the species mentioned above.
- Lake Mainit
   Thermocyclops sp.
             [1973]

 

Thermocyclops species in the "vicinity" of the Philippine Islands are:
T. operculifer (KIEFER, 1930) [Lesser Sunda Islands], T. trichophorus, KIEFER 1930 [Java], T. taihokuensis (HARADA 1931) (syn. T. asiaticus (KIEFER 1932) [Formosa, China], T. ianthinus (HARADA, 1931) [Formosa], T. maheensis (LINDBERG, 1941) [Indien], T. schmeili marmagoensis (SEWELL, 1957) [Indien]. (See Herbst 1986c)

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