Copepodid stages of Lichomolgus forficula Thorell 1859 (Copepoda,Poecilostomatoida, Lichomolgidae), a copepod associated with Phallusia mammillata (Cuvier, 1815)

The five copepodids of Lichomolgus forficula, a poecilostomatoid copepod (family Lichomolgidae), are described. Sexual dimorphism first occurs in copepodid V in which the male maxilliped, unlike that of female, shows a row of spinules on its second segment. Changes of leg armatures during copepodid development are discussed.