An integrative taxonomic assessment of Procamallanus (Spirocamallanus) huacraensis (Nematoda: Camallanidae), infecting the freshwater catfish Trichomycterus spegazzinii (Siluriformes: Trichomycteridae) in Argentina

Ailán-Choke, Lorena G.; Davies, Dora; Tavares, Luiz Eduardo Roland; Pereira, Felipe B.

doi:10.1007/s00436-019-06429-0

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…However, to confirm this assertion, specimens with the whole buccal capsule occupied by spiral ridges need to be genetically characterized and compared to the present data. It should be mentioned that, based on genetic evidence, the morphology of buccal capsule seems to bear some degree of artificiality in the systematics of genera and subgenera of Camallanidae (Wijová et al ., 2006; Sardella et al ., 2017; Ailán-Choke et al ., 2019), which may be also true at the species level, as suggested here.…”

Section: Discussionsupporting

confidence: 72%

“…inopinatus is almost constant, the number and distribution of spiral ridges on its buccal capsule is highly variable. In fact, these features have been pointed out as weak taxonomic characters within the complicated systematics of Camallanidae (Wijová et al ., 2006; Černotíková et al ., 2011; Sardella et al ., 2017; Ailán-Choke et al ., 2019). Therefore, in order to avoid further taxonomic confusions, we suggest that the specific diagnosis of P .…”

Section: Discussionmentioning

confidence: 99%

“…The overall phylogeny of Camallanidae was poorly resolved and monophyly was not observed in most genera and subgenera as a consequence of the morphology-based systematics that predominantly uses the buccal capsule structure as a diagnostic feature, which seems to be artificial as commented previously (Wijová et al ., 2006; Černotíková et al ., 2011; Sardella et al ., 2017; Ailán-Choke et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, the phylogenetic aspects of Camallanidae are far from being elucidated due to the lack of genetic data, which is aggravated by the fact that the morphology-based systematics of the family is problematic and taxonomic labelling of some sequences available in genetic databases (e.g. GenBank) seems to be inaccurate (Černotíková et al ., 2011; Sardella et al ., 2017; Ailán-Choke et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

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An integrative approach assesses the intraspecific variations ofProcamallanus(Spirocamallanus)inopinatus, a common parasite in Neotropical freshwater fishes, and the phylogenetic patterns of Camallanidae

Ailán-Choke

Tavares²,

Luque

et al. 2020

Parasitology

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Integrative taxonomy was used to evaluate two component populations of Procamallanus (Spirocamallanus) inopinatus in Brazil and the phylogeny Camallanidae. Parasite populations were collected in the characiform Anostomoides passionis from River Xingu (Amazon basin) and Megaleporinus elongatus from River Miranda (Paraguay basin). Morphology was analysed using light and scanning electron microscopy (SEM). Genetic characterization was based on partial sequences of the 18S and 28S rDNA, and COI mtDNA. Phylogenies were based on 18S and COI due to data availability. Generalized Mixed Yule Coalescent (GMYC), Poisson Tree Process (PTP) and *BEAST were used for species delimitation and validation. SEM revealed for the first time the presence of minute denticles and pore-like structures surrounding the oral opening, phasmids in females and confirmed other important morphological aspects. Statistical comparison between the two-component populations indicated morphometric variations, especially among males. The different component population of P. (S.) inopinatus showed variable morphometry, but uniform morphology and were validated as conspecific by the GMYC, PTP and *BEAST. Some camallanid sequences in GenBank have incorrect taxonomic labelling. Host, environment and geographic aspects seem to be related to some lineages within Camallanidae; however, their real phylogenetic meanings are still unclear.

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Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An integrative approach assesses the intraspecific variations ofProcamallanus(Spirocamallanus)inopinatus, a common parasite in Neotropical freshwater fishes, and the phylogenetic patterns of Camallanidae

Ailán-Choke

Tavares²,

Luque

et al. 2020

Parasitology

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“…Also, such study would contribute to generate additional empirical data to resolve the problematic related to the subgeneric status of the species included in the genus Procamallanus . Several authors have provided molecular data demonstrating that the subdivision of the genus into several subgenera based on the structure of the buccal capsule should be abandoned (Černotíková et al, 2011; Sardella et al 2017; Ailán‐Choke et al, 2019). We took a conservative position and decided to still use the traditional classification, as Procamallanus ( Spirocamallanus ) neocaballeroi .…”

Section: Discussionmentioning

confidence: 99%

Incipient genetic divergence or cryptic speciation? Procamallanus (Nematoda) in freshwater fishes (Astyanax)

2020

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Hosts provide the main environmental traits parasites have to deal with, resulting in covariation between both associates at both micro-and macro-evolutionary scales; phylogenetic analyses of highly host-specific parasites have shown that parasite and host phylogeny might be highly congruent, and adaptation of a host species to new environments may lead to concordant changes of their parasites. Procamallanus (Spirocamallanus) neocaballeroi is a highly host-specific parasitic nematode of the Neotropical freshwater fish genus Astyanax in Mexico. One of the host species of the nematode is the emblematic Mexican tetra, A. mexicanus, which exhibits two contrasting phenotypes, a cave-dwelling morph (with troglomorphic features), and the surface-dwelling morph; other congeneric species inhabit rivers and lakes, and some of them occur in sympatry, displaying trophic specializations. Here, we explored the hypothesis that contrasting environments (surface rivers vs cave rivers), and host morphological divergence (sympatric ecomorphs in a lacustrine environment) might result in the divergence of their parasites, even though the hosts maintain a cohesive genetic structure as the same species. To test the hypothesis, several populations of Astyanax spp. were sampled to search for P. (S.) neocaballeroi. The nematode was found in 10 of the 52 sampled sites; two localities corresponded to cave populations. The phylogenetic analysis based on COI sequences yielded three major lineages for P. (S.) neocaballeroi. We found no concordance between the three lineages and the habitat where they occur in Astyanax mexicanus, even considering those living in drastic environmental conditions (caves), or between these lineages and lacustrine ecomorphs of Astyanax aeneus and A. caballeroi occurring in sympatry. Instead, genetic lineages of the nematode exhibit a clearer pattern of host species association and geographical distribution; our results showed that P. (S.) neocaballeroi is experiencing an incipient divergence although the morphological study of lineages shows no conspicuous differences.

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Spirocamallanus delirae n. sp. (Nematoda, Camallanidae), a parasite of Propimelodus eigenmanni (Siluriformes: Pimelodidae) from the Brazilian Amazon

Ruffeil

Giese²,

Pinheiro³

2023

Syst Parasitol

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An integrative taxonomic assessment of Procamallanus (Spirocamallanus) huacraensis (Nematoda: Camallanidae), infecting the freshwater catfish Trichomycterus spegazzinii (Siluriformes: Trichomycteridae) in Argentina

Cited by 8 publications

References 20 publications

An integrative approach assesses the intraspecific variations ofProcamallanus(Spirocamallanus)inopinatus, a common parasite in Neotropical freshwater fishes, and the phylogenetic patterns of Camallanidae

An integrative approach assesses the intraspecific variations ofProcamallanus(Spirocamallanus)inopinatus, a common parasite in Neotropical freshwater fishes, and the phylogenetic patterns of Camallanidae

Incipient genetic divergence or cryptic speciation? Procamallanus (Nematoda) in freshwater fishes (Astyanax)

Spirocamallanus delirae n. sp. (Nematoda, Camallanidae), a parasite of Propimelodus eigenmanni (Siluriformes: Pimelodidae) from the Brazilian Amazon

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