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MAXILLOPODA (class)

 

COPEPODA, Copepods (subclass)

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Key to the families of the Philippine copepods.

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Key to genera and species à 104)

 

100 a. Anterior part of the body much bigger than more 
than twice length of the abdomen. First antenna 
long, about as long as body, with more than 
17 segments. Fifth leg asymmetrical. Mostly with 
only one brood sack. 
CALONOIDA (order)............................101

 

100 b. Anterior part of the body only a little bigger 
than and less than twice the length of the abdomen. 
First antenna short, with 6-17 segments, never 
reaching the abdomen. Fifth leg not asymmetrical. 
With two brood sacks.
   CYCLOPOIDA (and HARPACTICOIDA) (orders)......102

 

101 a. Inner branch (endopodit) of first, second, 
third and fourth leg with 3 segments. 
Caudal branches more than two times longer 
than wide. 
   PSEUDODIAPTOMIDAE (family)...................116

 

101 b. Inner branch of first leg with 2 segments, 
inner branch of second, third and fourth 
leg with 3 segments. Caudal branches less 
than two times longer than wide.
   DIAPTOMIDAE (family).........................106

 

102 a. Abdomen not clearly separated from the 
anterior part of the body. 
   LERNAIDAE (and HARPACTICIDAE)(families)......133

 

102 b. Abdomen distinct from the anterior part 
of the body..................................103

 

103 a. Second antenna small without a large claw. 
First antenna long, up to 17 segments 
(6-21 worldwide).
   CYCLOPIDAE (family)..........................108

 

103 b. Second antenna large, with a large claw for 
grasping. First antenna short with 6 segments.
   ERGASILIDAE (family).........................134  

 

 

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