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114 a. First antenna with 9-11 segments, not reaching beyond 
the cephalothorax. Last, distal segment of fifth leg 
of female with one long seta and one very small spine. 
Inner setae on caudal branch less than two times as 
long as outer setae.
    Microcyclops........................................128

 

114 b. First antenna with 17 segments reaching beyond the
cephalothorax. Last segment of fifth leg of female 
with 2 long setae. Inner setae on caudal branch 
more than twice as long as outer setae. 
Planktonic..............................................115

115 a. Last segment of fifth leg of female with one terminal 
seta and one seta on the inner margin. First antenna 
with hyaline plate on last segment.  
    Mesocyclops.........................................129

115 b. Last segment of fifth leg of female with two terminal 
setae. First antenna without hyaline plate.
    Thermocyclops.......................................130

 

 

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