-2DEC1986 PRESENTED ! GENERAL The Hemiuridae (Digenea) of fishes from the north-east Atlantic David I. Gibson & Rodney A. Bray Department of Zoology, British Museum (Natural History), Cromwell Road, London SW7 5BD Contents Synopsis Introduction Materials and methods . . . . Systematic section Family Hemiuridae . . . A taxonomic history of the group . Life-history and larval records Key to the subfamilies . Subfamily Hemiurinae Hemiurus appendiculatus Hemiurus communis Hemiurus levinseni . . Hemiurus luehei .... Parahemiurus . . Subfamily Dinurinae Dinurus ..... Ectenurus lepidus . . . Subfamily Elytrophallinae Lecithocladium excisum Subfamily Glomericirrinae Glomericirrus macrouri Subfamily Lecithochiriinae Lecithochirium rufoviride Lecithochirium furcolabiatum Lecithochirium fusiforme . . Lecithochirium musculus Br achy phallus crenatus . Subfamily Plerurinae Dinosoma ventrovesicularis sp. nov. Synaptobothrium caudiporum Host-parasite list . . . . . Acknowledgements References 1 13 25 31 38 38 38 39 45 45 54 55 61 62 69 76 83 90 97 97 103 107 111 111 Synopsis Keys, original descriptions, full host-records, locality data and comments on some aspects of their biology are presented for all of the hemiurid species recorded from the north-east Atlantic region. The species described are Hemiurus appendiculatus, H. communis, H. levinseni, H. luehei, Ectenurus lepidus, Lecithocladium excisum, Glomericirrus macrouri, Lecithochirium rufoviride, L. furcolabiatum, L. fusiforme, L. musculus, Brachyphallus crenatus, Dinosoma ventrovesicularis sp. nov. and Synaptobothrium caudiporum. In addition, details of the records of the larval stages from invertebrates are given, and comments are made Bull. Br. Mus. not. Hist. (Zool.) 51 (1): 1-125 Issued 30 October 1986