Pomphorhynchus omarsegundoi sp. n. (Acanthocephala: Pomphorhynchidae), parasite of the banded knifefish Gymnotus carapo (Gymnotiformes: Gymnotidae) from the Paraná River basin, Argentina

Arredondo, Nathalia J.; Pertierra, Alicia A. Gil de

doi:10.14411/fp.2010.037

Cited by 9 publications

(6 citation statements)

References 18 publications

(3 reference statements)

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“…Nevertheless, even though at a slow rate, recent efforts have been undertaken to depict the diversity of this group in South American fish (fig. 1; Vieira et al , 2009; Arredondo & Gil de Pertierra, 2010, 2012; Lanfranchi & Timi, 2011; Braicovich et al ., 2014; Lisitsyna et al ., 2015; Mello et al ., 2015).…”

Section: Taxonomy and Systematics Of The Helminths Parasitic In Fish mentioning

confidence: 99%

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

et al. 2016

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The South American subcontinent supports one of the world's most diverse and commercially very important ichthyofauna. In this context, the study of South American fish parasites is of increased relevance in understanding their key roles in ecosystems, regulating the abundance or density of host populations, stabilizing food webs and structuring host communities. It is hard to estimate the number of fish parasites in South America. The number of fish species studied for parasites is still low (less than 10%), although the total number of host-parasite associations (HPAs) found in the present study was 3971. Monogeneans, with 835 species (1123 HPAs, 28.5%), and trematodes, with 662 species (1127 HPAs, 30.9%), are the more diverse groups. Data gathered from the literature are useful to roughly estimate species richness of helminths from South American fish, even though there are some associated problems: the reliability of information depends on accurate species identification; the lack of knowledge about life cycles; the increasing number of discoveries of cryptic species and the geographically biased number of studies. Therefore, the closest true estimations of species diversity and distribution will rely on further studies combining both molecular and morphological approaches with ecological data such as host specificity, geographical distribution and life-cycle data. Research on biodiversity of fish parasites in South America is influenced by problems such as funding, taxonomic impediments and dispersion of research groups. Increasing collaboration, interchange and research networks in the context of globalization will enable a promising future for fish parasitology in South America.

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Section: Taxonomy and Systematics Of The Helminths Parasitic In Fish mentioning

confidence: 99%

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

et al. 2016

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“…Molecular studies suggest that N. golvani has diversified and may be a species complex (Martínez-Aquino et al ., 2009; Pinacho-Pinacho et al ., 2015b). Information from SA suggests that the continent has a morphologically diverse acanthocephalan fauna but, for its size, a modest number of species (37 species in 15 genera): Acanthodelta (1), Echinorhynchus (6), Gorytocephalus (3), Gracilisentis (1), Megapriapus (1), Neoechinorhynchus (6) Octospiniferoides (2), Palliolisentis (3), Pandosentis (1), Polyacanthorhynchus (2), Pomphorhynchus (5), Paracavisoma (1), Quadrigyrus (3), Rhadinorhynchus (1) and Wolffhugelia (1) (Vizcaíno & Lunaschi, 1987; Thatcher, 1991, 2006; Amin, 2000, 2013; Olmos & Habit, 2007; Santos et al ., 2008; Arredondo & Gil de Pertierra, 2010; Melo et al . 2013).…”

Section: Resultsmentioning

confidence: 99%

Parasites of freshwater fishes and the Great American Biotic Interchange: a bridge too far?

2016

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We examine the extent to which adult helminths of freshwater fishes have been part of the Great American Biotic Interchange (GABI), by integrating information in published studies and new data from Panama with fish biogeography and Earth history of Middle America. The review illustrates the following: (1) the helminth fauna south of the Trans-Mexican Volcanic Belt, and especially south of the Isthmus of Tehuantepec, shows strong Neotropical affinities; (2) host-parasite associations follow principles of the 'biogeographic core fauna' in which host-lineage specificity is pronounced; (3) phylogenetic analysis of the widespread freshwater trematode family Allocreadiidae reveals a complex history of host-shifting and co-diversification involving mainly cyprinodontiforms and characids; (4) allocreadiids, monogeneans and spiruridan nematodes of Middle American cyprinodontiforms may provide clues to the evolutionary history of their hosts; and (5) phylogenetic analyses of cryptogonimid trematodes may reveal whether or how cichlids interacted with marine or brackish-water environments during their colonization history. The review shows that 'interchange' is limited and asymmetrical, but simple narratives of northward isthmian dispersal will likely prove inadequate to explain the historical biogeography of many host-parasite associations in tropical Middle America, particularly those involving poeciliids. Finally, our study highlights the urgent need for targeted survey work across Middle America, focused sampling in river drainages of Colombia and Venezuela, and deeper strategic sampling in other parts of South America, in order to develop and test robust hypotheses about fish-parasite associations in Middle America.

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“…P. bulbocolli Based on the contradictory results obtained about the interspecific variability inside the genus, it will be interesting to know the relationship among the three Patagonian species (P. patagonicus, P. moyanoi, and P. yamagutii), which show very similar morphological characteristics (see Table 1 in Olmos and Habit 2007). On the other hand, P. omarsegundoi could be clearly distinguished from P. sphaericus, but the species is characterized by a non-spirally twisted long neck with an inconspicuous and asymmetrical bulb, and this feature does not fit well with the traditional definition of the genus (Arredondo and Gil de Pertierra 2010). Unfortunately, we still do not have neither specimens of P. sphaericus from the other fish hosts nor the other species from South America.…”

Section: Discussionmentioning

confidence: 99%

“…To date, only five species were reported in freshwater fishes of South America. These are Pomphorhynchus moyanoi Olmos &Habit, 2007 andPomphorhynchus yamagutii Schmidt &Hugghins, 1973 from Chile parasitizing Percilia gillissi Girard and Percichthys melanops Girard (Percichthyidae), respectively; and three species from Argentina, Pomphorhynchus omarsegundoi Arredondo & Gil de Pertierra, 2010 parasitizing Gymnotus carapo Linnaeus (Gymnotidae); Pomphorhynchus patagonicus Ortubay et al, 1991 parasitizing several freshwater fish species of Patagonia; and Pomphorhynchus sphaericus Gil de Pertierra et al, 1996 parasitizing freshwater pimelodids from the Parano-Platense River basin (Schmidt and Hugghins 1973;Ortubay et al 1991;Gil de Pertierra et al 1996;Olmos and Habit 2007;Arredondo and Gil de Pertierra 2010). Recently, Hernández-Orts et al (2019) provided a complete list of Argentinean Pomphorhynchus fish hosts.…”

Section: Introductionmentioning

confidence: 99%

New insights on Pomphorhynchus sphaericus Gil de Pertierra, Spatz et Doma, 1996 (Acanthocephala: Pomphorhynchidae)

et al. 2021

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The finding of Pomphorhynchus sphaericus in new localities from La Plata River allowed the reevaluation of the species using a taxonomic integrative approach. The newly found specimens in Pimelodus maculatus from Samborombon Bay differ from P. sphaericus by the roots of hooks 1-6 which not form a wide sheet split into 2 apophysis, the slender, separated and equatorial testicles, the position of the cement glands, the shape of the proboscis, the shape and length of lemnisci, and the eggs size. Despite the notorious observed morphological differences, the COI mtDNA analysis confirmed that Pomphorhynchus individuals are the same conspecific, and showed that there is a high phenotypical plasticity in this species. Pomphorhynchus sphaericus is the first South American species analyzed to a DNA level (COI mtDNA, ITS, and 18S rDNA genes). The molecular analysis relates P. sphaericus to P. bulbocolli and P. purhepechus.

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Pomphorhynchus omarsegundoi sp. n. (Acanthocephala: Pomphorhynchidae), parasite of the banded knifefish Gymnotus carapo (Gymnotiformes: Gymnotidae) from the Paraná River basin, Argentina

Cited by 9 publications

References 18 publications

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

Parasites of freshwater fishes and the Great American Biotic Interchange: a bridge too far?

New insights on Pomphorhynchus sphaericus Gil de Pertierra, Spatz et Doma, 1996 (Acanthocephala: Pomphorhynchidae)

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