ROTIFERA, Rotifers. Key to genera and species of Philippine rotifers.

Back to 14 a

15 a. Foot and foot opening present (foot often retracted up into the
      body on formalin preserved specimens)...........................16

15 b. Foot absent.....................................................28

 

16 a. Foot with toes..................................................17

16 b. Foot without toes, foot ends in a holdfast or in a circle of cilia
      or neither......................................................26

 

17 a. Lorica present, i.e. cuticle thickened to form a stiff shell
      (lorica) which retain its well after preservation...............18

17 b. Lorica absent, i.e. cuticle thin and flexible, not retaining
      its shape well after preservation. Semiplanktonic, littoral. 
          Asplanchnopus...............................................64

 

18 a. Lorica flattened dorsoventrally or not flattened................19

18 b. Lorica more or less flattened laterally.........................25

to 19 a.