udonella australis n. sp. (monogenea), an epibiont on sea-lice from native fish off southern chile.udonella australis n. sp., an epibiont monogenean living on caligid copepods that infest a native fish, eleginops maclovinus (valenciennes), off chile, south america is described. the species can be separated from other species by its difference in size, especially body size, and the distribution of cephalic glands, vitelline follicles and genital organs. egg-size is intermediate in comparison with that of other species. the posterior attachment mechanism consists of few muscle fibres and clumpe ...200212023563
the early development of udonella caligorum johnston, 1835 (trematoda: monogenea). 19724641883
[nervous system of udonella caligorum johnston (turbellaria, udonellida)]. 2007865868
udonella myliobati n. comb. (platyhelminthes:udonellidae) and its occurrence in eastern australia.a total of 2,571 of the copepod caligus epidemicus hewitt from the yellow-fin bream, acanthopagrus australis günther, was examined for udonellids. calinella myliobati guberlet, 1936 was found on 3.3% of male copepods and 10.1% of female copepods. a new combination, udonella myliobati (guberlet, 1936) is proposed and its description emended. it differs from the type species udonella caligorum johnston, 1835 (as described by price [1938]) in having a short egg filament and a median genital apertur ...19968973415
a preliminary phylogenetic analysis of the capsalidae (platyhelminthes: monogenea: monopisthocotylea) inferred from large subunit rdna sequences.phylogenetic relationships within the capsalidae (monogenea) were examined using large subunit ribosomal dna sequences from 17 capsalid species (representing 7 genera, 5 subfamilies), 2 outgroup taxa (monocotylidae) plus udonella caligorum (udonellidae). trees were constructed using maximum likelihood, minimum evolution and maximum parsimony algorithms. an initial tree, generated from sequences 315 bases long, suggests that capsalinae, encotyllabinae, entobdellinae and trochopodinae are monophyl ...200415180319
variation in the small subunit ribosomal dna confirms that udonella (monogenea: udonellidae) is a species-rich group.numerous global reports of the species udonella caligorum, currently thought to be a species complex, suggests that the group may be species-rich. herein we describe udonella fugu n. sp., previously described as u. caligorum, found on the parasitic copepod pseudocaligus fugu infecting takifugu spp. from japan. using morphological data u. fugu can be distinguished from the current valid species by at least one of the traditionally used characters in udonellid taxonomy, and phylogenetic analyses o ...201019715695
epibiotic macrofauna on common minke whales, balaenoptera acutorostrata lacépède, 1804, in icelandic waters.whilst there is a body of scientific literature relating to the epibiotic macrofauna on large whales, there is little information on the cetaceans in icelandic waters. common minke whales, balaenoptera acutorostrata lacépède, 1804, are a common sighting between the months of april to november, however, the migration and distribution of the population in winter requires establishing. the present study provides baseline information on the species composition, geographic distribution and abundance ...201323594428
a review of potential pathogens of sea lice and the application of cleaner fish in biological control.there are many examples of successful biological control of pest populations in aquatic environments. this approach to sea louse control has environmental benefits and is cost-effective. the range of possible pathogens of lice is reviewed and epibionts recorded from sea lice, including the monogenean udonella caligorum and ciliates, are examined. baculoviruses when ingested by insects form occlusion bodies resulting in severe damage to the digestive system and subsequent death, and this may be a ...200212138621
infestation dynamics of external parasites of saithe (pollachius virens) from the north and norwegian attempt has been made to examine the saithe's external parasites with respect to host age and the reproduction time of clavella adunca in the north sea. 1835 specimens of pollachius virens caught in 1976-1980 and 1986 were examined. they were infested with diclidophora denticulata, udonella caligorum (monogenea) and clavella adunca, lepeophtheirus pollachius, caligus elongatus (copepoda). the large number of adult females of c. adunca in winter and spring, the juvenile forms in summer and for ...19911823481
the phylogenetic position of udonella (platyhelminthes).phylogenetic analysis of molecular data from complete 18s rrna and partial 28s rrna genes, of a variety of platyhelminths, places the enigmatic udonella caligorum firmly as a monopisthocotylean monogenean. both maximum parsimony and a modified distance measure, operating under a maximum likelihood model, gave identical solutions for each data set. these data further support morphological evidence from ultrastructural studies indicating the neodermatan affinities of udonella, namely shared featur ...19989762571
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