PHYLOGENY OF ARIETELLID COPEPODS 



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Fig. 21. Metacalanus sp. 1, female (B,E-I), male (C,D); Metacalanus sp. 2, female (A). A,B, Genital double-somite, ventral view; C, Left 

 antennulary segments I to XVII; D, Left antennulary segments XVIII to XXVIII; E, Antennary exopod; F, Mandibular palp; G, Praecoxal 

 arthrite, coxal endite and endopod of maxillule, endopod indicated by arrowhead; H, First and second praecoxal endites of maxilla; I, 

 Basal spine of maxilla. Scales in mm. 



