Pampean and Andean Cuyan regions and some host families remain unexplored in terms of nematode parasite detection. Parasitic nematodes from Argentinian freshwater fi shes is far from complete, since some hydrological basin mainly in
Despite this study is exhaustive, the knowledge about Taxa recorded for new host records and four from new localities. This is the fi rst compilation on the nematode parasites of freshwater fi shes from Argentina, including three nematode
Reference collection, as well as performing integrative studies to elucidate the real taxonomic identity of nematode larvae. Therefore, it is strongly recommended to deposit voucher specimens, including also of the hosts in The taxonomic validity of some nematode species, doubtful host identifi cation, and poor taxonomic resolution for larval Other obstacles that also contributes to the lack of completeness of this checklist are the problems in Small number of examined fi sh hosts and geographically biased studies may not refl ect the real richness and distribution Most sampling were done in Great River and Patagonian ichthyogeographic provinces. Which may refl ects sampling effort, since its abundance and widely distributions across differents ichthyogeographic Most records were in Characiformes, Siluriformes and Galaxiiformes, Of the 570 species of freshwater fi shes reported in Argentina, onlyĦ5 (11.4 %) were recorded as hosts of nematodes. Spirocamallanus inopinatus, and Camallanus corderoi. was the parasite with the widest range of host species, follow by Spirocamallanus hilarii, (12 species), followed by Cucullanidae (4 species) and Raphidascarididae (4 species and 1 at genus level). Camallanidae was the nematode family with the highest number of taxa
Have been reported as adults and two as larvae. Includes information for 42 taxa of parasitic nematodes from 56 species of freshwater fi sh hosts. surveys, taxonomicĪnd ecological papers, has shown a considerable increase of ecological studies over the last decade.Īn annotated checklist of the nematodes parasites of Argentinian freshwater fi shes is presented. An analysis of the proportion of three basic types of studies, i.e. Recommended to always deposit representative specimens in any type of studies, including faunal surveysĪnd ecological studies. identification made only to the genus or even family level (iii) doubtful host identification and (iv) the absence of voucher specimens that would enable us to verify identification. The following problems wereĭetected during the compilation of literary data: (i) unreliability of many records (ii) poor taxonomic In South America, being mostly recorded from the Warm Temperate Southeastern Pacific (WTSP 31%)įor marine hosts and the Amazon River basin (45%) for freshwater ones. The highest proportion of records (39%) among the elasmobranch hosts. The majority of records include teleostįish hosts (79%) that harbour larval and adult stages of cestodes, whereas stingrays (Myliobatiformes) exhibit Highest species richness, representing c. Among the recognizedĬestode orders, 13 have been recorded in South America, with the Onchoproteocephalidea displaying the
In addition to unidentified cestodes, were recorded from 401 species of fish hosts. A total of 297 valid species, 61 taxa identified to the generic level, May also be due to the research effort that has been devoted to unravelling the diversity of these endoparasitic These differences may not only reflect the actual cestode richness but Knowledge is quite uneven regarding the number of taxa and host-associations reported from the principal Individual taxa is provided to facilitate future taxonomic and phylogenetic studies. Problems are discussed based on a critical evaluation of the literature and information on DNA sequences of Knowledge of their species diversity, host associations and geographical distribution is reviewed. cartilaginous and bony fishes, in South America. An exhaustive literature search supplemented by a critical examination of records made it possible to presentĪn annotated checklist of tapeworms (Cestoda) that, as adults or larvae (metacestodes), parasitize freshwater,īrackish water and marine fishes, i.e.
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