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A key to families of copepods parasitic on British fishes
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abdomen Alella apical armature appendages basal segment base Beneden biramous Bomolochus Brachiella British waters Caligidae Caligus cephalothorax Chondracanthus Clavella claw copepods cyclopoid cylindrical delimited denticles dorsal shield egg sacs endopod Ergasilidae Ergasilus exopod Female Figs Fifth leg fishes fourth leg free segment fused genera genital complex genital segment genus host indistinctly inflated Kabata Kreyer labrum lateral margins leg Fig Leigh-Sharpe Lepeophtheirus Lernaea Lernaeocera Lernaeopodidae lobes Mandible Maxilliped medial margin morphological mouth Neobrachiella one-segmented outgrowths Pandaridae Pandarus papilla parasitic parasitic copepods posterior extremity posterior margin posterior processes posteriorly posterolateral corners prominent rami rounded Salmincola Scott and Scott Second antenna Fig Second leg Second maxilla Fig second segment setae setules shorter similar siphonostome slightly specimens spine structure subchela swimming legs sympod synonymy tagma tapering teleosts Text fig thoracic segments three-segmented Total length transverse trunk tubercle two-segmented type species unarmed uniramous uropods ventral ventral surface Wilson Yamaguti