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107 a. Hyaline process of the 3rd last segment of the right first
antenna of male short and serrated. Basis of male fifth leg
with 3 sigmoid protrusions. Outer distal corner without
particular extension of the exopodite of the 5th right male
leg. Front part of female abdomen with peg-like spines on
genital segment.
Filipinodiaptomus.......................................119
107 b. Differ from Filipinodiaptomus by outer distal corner being
produced sharply of the exopodite of the 5th right male leg
(large wings).
Arctodiaptomus....................................119c
107 c. Hyaline process of the 3rd last segment of right first
antenna of the male membranous without serration. None
sigmoid protrusions on basis of male right leg. No
peg-like processes on the female abdomen.
Mongolodiaptomus.........................................120
108 a. Abdomen not clearly separated from the anterior part of the body.
LERNAIDAE (family)
Antenna terminating in a minute hook....... Lernaea 145
Antenna without terminal hook...........Lamproglena 146
108 b. Abdomen distinct from the anterior part of the body.........109
109 a. Second antenna small without a large claw.
First antenna long, up to 17 segments (6-21 worldwide).
CYCLOPOIDA (order)
CYCLOPIDAE (family)......................................110
109 b. Second antenna large, with a large claw for grasping.
First antenna short with 6 segments.
ERGASILIDAE (family)
Ergasilus................................................134
To 110a
