Notocotylus chionis (Trematoda: Notocotylidae) and Notocotylus sp. from shorebirds in southern Patagonian wetlands of Argentina: morphological and molecular studies

Capasso, Sofía Carolina; Servián, Andrea; Tkach, Vasyl V.; Díaz, Julia Inés

doi:10.1007/s00300-020-02753-9

Cited by 3 publications

(3 citation statements)

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“…3), 2 well-supported clades united species with molluscan hosts mainly of subclass Caenogastropoda and subclass Heterobranchia. Recent works recorded this separation regarding molluscan intermediate host (Assis et al ., 2019; Gonchar et al ., 2019; Capasso et al ., 2020; Gonchar and Galaktionov, 2021). Further, both clades include mainly freshwater species with the exception of 2 species from brackish habitats.…”

Section: Discussionmentioning

confidence: 99%

“…All sequences have been deposited in GenBank. The other available 28S sequences of the specimens of family Notocotylidae from GenBank were taken to compare with the species here described (Table 1 from Capasso et al ., 2020) and Catatropis onobae Gonchar and Galaktionov, 2021 (Gonchar and Galaktionov, 2021).…”

Section: Methodsmentioning

confidence: 99%

“…Despite the great number of described species, 1 molecular sequence is available, Paramonostomum anatis Garkavi, 1965. Recently, the use of molecular tools has increased the knowledge of trematodes biology, including their life cycles (Blasco-Costa et al, 2016). Nevertheless, combining morphological and molecular approaches to study species of the family Notocotylidae Lühe, 1909 is quite uncommon (Boyce et al, 2012;Assis et al, 2019;Capasso et al, 2020;Gonchar and Galaktionov, 2020). Till date, DNA sequences were available for only 5 out of 21 species of notocotylids reported from vertebrate hosts in South America (Fernandes et al, 2015;Capasso et al, 2020;Diaz et al, 2020), namely Hippocrepis hippocrepis (Diesing, 1850) from Brazil (Cox1 and 28S genes), Ogmogaster antarctica Johnston, 1931 (18S and 28S genes), Notocotylus primulus Diaz et al, 2020 from Argentina (5.8S-ITS2-28S sequence), N. chionis Baylis, 1928 and Notocotylus sp.…”

Section: Introductionmentioning

confidence: 99%

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Paramonostomum deseado n. sp. (Digenea: Notocotylidae) parasitizing the South American Black Oystercatcher and their atypical life cycle from the Patagonian coast

et al. 2022

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By way of morphological and molecular analysis we describe a new species of notocotylid, Paramonostomum deseado n. sp., parasitizing Haematopus ater from Argentina and we contribute to elucidate its life cycle. Within this genus, 4 groups can be morphologically distinguished according to body shape: ‘Oval’, ‘Pyriform’, ‘Elongate’, ‘Overlong’. The new species belongs to the ‘Elongate group’, which presents a wide variation in body length (597–4500 μm). The new species, Paramonostomum caeci from Australia, Paramonostomum actitidis from the Caribbean and Paramonostomum alveoelongatum from Russia share the smallest range of body size in this group (<1130 μm). The new species more closely resembles P. actitidis but differs from it by cirrus-sac length, which is shorter in the new species (97–146 vs 280–430 μm in P. actitidis), and egg size which is larger in the new species (25–33 vs 18–20 μm in P. actitidis). Paramonostomum deseado n. sp. uses the limpet Nacella magellanica as both first and second intermediate hosts in which metacercariae encyst inside the redia. This is the first abbreviated cycle described for notocotylid species. Ribosomal RNA sequences provided for adults (ITS1, ITS2 and 28S) and metacercariae inside the rediae (ITS1) support the species identification and the correspondence among stages. Phylogenetic analysis based on 28S placed P. deseado n. sp. close to other Notocotylus spp. and Paramonostomum anatis. Molecular results demonstrate that the hosts involved in the life cycles and the habitat more than morphological differences are determining the phylogenetic relationships in members of Notocotylidae.

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