Taxonomic revision of Australian Eutetrarhynchidae Guiart (Cestoda : Trypanorhyncha)

Abstract

All species of eutetrarhynchid cestodes known from Australian elasmobranch fishes are redescribed and 10 new species are erected. The genera Prochristianella Dollfus, 1946, and Trigonolobium Dollfus, 1929 are reported from the Australian region for the first time. Trigonolobium is described in detail and allocated to the Eutetrarhynchidae Guiart, 1927. The genus Eutetrarhynchus Pintner, 1913 is redefined. E. australis Prudhoe, 1969, and E. geraschmidti Dollfus, 1974 are redescribed. E. leucomelanus (Shipley & Hornell, 1906) and E. michiae (Southwell, 1929) are redescribed from the types and reported for the first time from the Australian region. Five new species of Eutetrarhynchus are described: E. aetobati, sp. nov., E. bareldsi, sp. nov., E. martini, sp. nov., E. ocallaghani, sp. nov., and E. owensi, sp. nov. The genus Prochristianella is redefined and four new species are added: P. butlerae, sp. nov., P. clarkeae, sp. nov., P. mooreae, sp. nov., and P. odonoghuei, sp. nov. The genus Parachristianella Dollfus, 1946 is redefined. Pa. monomegacantha Kruse, 1959 is redescribed from Australian specimens, and Pa. baverstocki, sp. nov. is added to the genus. Trigonolobium spinuliferum (Southwell, 1911) is redescribed and reported for the first time from the Australian region. Trimacracanthus Beveridge & Campbell, 1987 is included in the revision. Keys are included to all genera and species. The following new combinations are used: Eutetrarhynchus micracanthus (Carvajal, Campbell & Cornford, 1976) (syn. Prochristianella micracantha), Eutetrarhynchus musteli (Carvajal, 1974) (syn. Prochristianella musteli), Prochristianella thalassia (Kovacs & Schmidt, 1980) (syn. Eutetrarhynchus thalassius) and Parachristianella carribensis (Kovacs & Schmidt, 1980) (syn. Eutetrarhynchus carribensis).