Rhinoxenus (Dactylogyridae) parasitizing piranhas (Serrasalmidae) at its southernmost limit of distribution (Paraná River, Argentina), with the description of two new species

Rossin, María Alejandra; Francesco, Pablo N. De; Irigoitia, Manuel Marcial; Scarabotti, Pablo Augusto; Taglioretti, Verónica; Timi, Juan T.

doi:10.1590/0001-3765201920190711

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The genus Anacanthorus includes ~92 valid species (Table 2 and Figure 4), which are gill parasites of characiform fishes of the Serrasalmidae (41 species), Triportheidae (20 species), Bryconidae (19 species), Erythrinidae (eight species), and Characidae (four species). Brazil harbours the greatest number of Anacanthorus taxa (Jégu & dos Santos, 2001;Rossin et al, 2019). However, for the Northern Brazil basin, the identification of S. spilopleura is still valid, so records of S. spilopleura in the northern basins were not included in the review.…”

Section: Resultsmentioning

confidence: 99%

“…Braz *Parasitological reports from the Paraná River basin address the species Serrasalmus maculatus and Serrasalmus spilopleura Kner, 1860, as they were all synonymized with S. maculatus (Jégu & dos Santos, 2001;Rossin et al, 2019). However, for the Northern Brazil basin, the identification of S. spilopleura is still valid, so records of S. spilopleura in the northern basins were not included in the review.…”

Section: Resultsmentioning

confidence: 99%

“…Serrasalmus maculatus showed piscivorous food habits, due to the predominant consumption of fish fragments (81.7%). (Jégu & dos Santos, 2001;Rossin et al, 2019). However, for the Northern Brazil basin, the identification of S. spilopleura is still valid, so records of S. spilopleura in the northern basins were not included in the review.…”

Section: Resultsmentioning

confidence: 99%

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Parasites and diet of Serrasalmus maculatus in a hydroelectric reservoir in Brazil

Miguel

Franceschini

Manoel

et al. 2022

Rev. Bras. Parasitol. Vet.

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Serrasalmus maculatus is a species of piranha which, despite being abundant in a reservoir environment, has few studies related to its parasitological and diet aspects. Thus, we aimed to document the parasitic fauna and diet of the S. maculatus in a hydroelectric reservoir in Brazil. In addition, we perform two literature reviews for the Neotropical region, recording the parasitic fauna already associated with S. maculatus and the occurrence of parasite genera identified in this study parasitizing Characiformes from other aquatic systems. Thirty-one hosts were collected with gillnets, from August 2014 to September 2016. Serrasalmus maculatus had a piscivorous feeding habit and a low richness parasitic component community, including two taxa of monogeneans, Anacanthorus lepyrophallus and Mymarothecium sp.; no endohelminths were observed. Data from the literature review, together with the findings of the study, showed that S. maculatus in the Neotropical region harbors 25 helminth taxa, with the monogenean being the most prevalent parasitic group and Brazil is the country with the most reports of the parasitic genera. These findings provide information on the relationships between diet, social behavior, and parasitic fauna of S. maculatus and on the patterns of distribution and infection of the observed parasite rates.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Parasites and diet of Serrasalmus maculatus in a hydroelectric reservoir in Brazil

Miguel

Franceschini

Manoel

et al. 2022

Rev. Bras. Parasitol. Vet.

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Molecular phylogeny of two Rhinoxenus species (Monogenea: Dactylogyridae) from the nasal cavities of serrasalmids (Characiformes: Serrasalmidae) from Brazil

Osaki-Pereira,

Narciso,

Vieira

et al. 2023

Syst Parasitol

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Two new species of Monopisthocotyla (Dactylogyridea: Dactylogyridae) parasitizing the nasal cavities of Bryconops melanurus (Characiformes: Iguanodectidae) from coastal drainages of the Eastern Amazon, Brazil

SANTOS-NETO,

PAIXÃO,

DOMINGUES

2024

Zootaxa

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The present study integrates molecular and morphological data to support the proposal of new species of Telethecium Kritsky, Van Every & Boeger, 1996 and Diaphorocleidus Jogunoori, Kritsky & Venkatanarasaiah, 2004 from the nasal cavities of Bryconops melanurus (Bloch) of the coastal drainages of the Eastern Amazon. Telethecium tiquira sp. n. is characterized by possessing a male copulatory organ (MCO) with two circular sclerotized brims on the base, a coiled tubular shaft having 1 ½ counterclockwise rings, an accessory piece with enlarged base, pincer-shaped at the distal portion; a sclerotized calyx-shaped vaginal vestibule, and hooks with proximal shank dilatation comprising 3/4 of the shank length. Also, Telethecium tiquira sp. n. can be easily distinguished from other species of the genus by the absence of a protruding bag located at the level of the copulatory complex. Diaphorocleidus forficata sp. n. is characterized by having a MCO with two counterclockwise rings, circular sclerotized tandem brim associated with the base of the MCO; accessory piece non-articulated with the MCO, bifurcate, pincer-shaped; vaginal pore sinistral-ventral with opening marginal, vaginal canal sclerotized, elongated, comprising one loop in the proximal portion before entering to the seminal receptacle; ventral anchor with shaft elongated and evenly curved on the axis; point short and slightly curved, and hooks similar in shape and size, hooks with proximal dilatation comprising approximately ½ of the shank length. Furthermore, D. forficata sp. n. is supported by phylogenetic analysis based on sequences of the partial 28S rDNA gene, which placed D. forficata sp. n. in a well-supported clade of Diaphorocleidus spp. of characiform fishes. Thus, the two new species described here expand our knowledge about the diversity of monopisthocotylan parasites from the nasal cavities of Neotropical fishes. The findings of this study provide valuable insights into the biodiversity of the region and highlight the importance of further research in this area.

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Rhinoxenus (Dactylogyridae) parasitizing piranhas (Serrasalmidae) at its southernmost limit of distribution (Paraná River, Argentina), with the description of two new species

Cited by 4 publications

References 9 publications

Parasites and diet of Serrasalmus maculatus in a hydroelectric reservoir in Brazil

Parasites and diet of Serrasalmus maculatus in a hydroelectric reservoir in Brazil

Molecular phylogeny of two Rhinoxenus species (Monogenea: Dactylogyridae) from the nasal cavities of serrasalmids (Characiformes: Serrasalmidae) from Brazil

Two new species of Monopisthocotyla (Dactylogyridea: Dactylogyridae) parasitizing the nasal cavities of Bryconops melanurus (Characiformes: Iguanodectidae) from coastal drainages of the Eastern Amazon, Brazil

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