| abstract | A systematic revision is presented fro the genus Brephosceles. Data on external morphology, zoogeography, and host-parasite relationships are included. Thirteen named and thirty new species are recognized and described. The new species and the type hosts are: Brephosceles afribycis, from Afribyx lateralis (Charadriidae); B. anhimae, from Anhima cornuta (Anhimidae); B. belonopteri, from Belonopterus chilensis cayennensis (Charadriidae); B. bilobatus, from Puffinus puffinus (Procellariidae); B. chilensis, from Belonopterus chilensis lampronotus (Charadriidae); B. collaracus, from Charadrius collaris (Charadriidae); B. constrictus, from Charadrius bicinctus (Charadriidae); B. diomedei, from Diomedea chrysostoma (Diomedeidae); B. discidicus, from Cygnus bewickii (Anatidae); B. disjunctus, from Pterodroma leucoptera hypoleuca (Procellariidae); B. haematopi from Haematopus ostralegus longirostris (Haematopodidae); B. hoplopteri, from Hoplopterus duvancelii (Charadriidae); B. inornatus, from Charadrius leschenaultii (Charadriidae); B. lanceolatus, from Oceanodroma castro bangsi (Hydrobatidae); B. lobivanelli, from Lobivanellus indicus atronuchalis (Charadriidae); B. longipenis, from Oceanodroma markhami tristrami (Hydrobatidae); B. longistriatus, from Charadrius vociferus ternominatus (Charadriidae); B. lunatus, from Pterodroma externa externa (Procellariidae); B. pachyptilae, from Pachyptila desolata (Procelariidae); b. parvatus, from from Puffinus pacificus chlororhynchos (Procellariidae); B. prolatus, from Pachyptila desolata (Procellariidae); B. pterodromae, from Pterodroma leucoptera hypoleuca (Procellariidae); B. puffini, from Puffinus gravis (Procellariidae); B. selenopeltatus, from Puffinus pacificus cuneatus (Procellariidae); B. stephanibycis, from Stephanibyx melanopterus (Charadriidae); B. marlae, from Puffinus tenuirostris (Procellariidae); B. triangularis, from Pterodroma cooki defilippiana (Procellariidae); B. tuberi, from Charadrius alexandrinus seebohmi (Charadriidae); B. turgidus, from Haematopus palliatus palliatus (Haematopodidae); B. virginiensis, from Charadrius wilsonia wilsonia (Charadriidae). |