Gastrointestinal helminth parasites of the threatened Australasian crested grebe (Podiceps cristatus australis, Gould 1844) in New Zealand, with descriptions of Baruscapillaria kamanae n. sp. (Nematoda: Trichuridae) and Cryptocotyle micromorpha n. sp. (Trematoda: Opisthorchiidae)

Presswell, Bronwen; Bennett, Jerusha

doi:10.1007/s11230-022-10022-y

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…We provided the first data of H. californicus, a parasite associated with Nearctic gulls such as Larus californicus [33]. For the genus Confluaria (parasite of grebes), there was only one pre-existing 28S sequence for Confluaria pseudofurcifera infecting Podiceps cristatus [51] and we presented the first data for C. podicipina.…”

Section: Molecular Novelties and The Diversity Of Avian Cestodesmentioning

confidence: 99%

“…Molecular studies are useful for discovering new parasite species, contributing to biodiversity [6,56,60], and for advances on waterbird parasites and their life cycles [51,61]. This is particularly relevant for protected waterbirds for which the knowledge of their parasite fauna is little known, such as the case of flamingos in Chile (present study).…”

Section: Future Directionsmentioning

confidence: 99%

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Phylogenetic Relationships of Avian Cestodes from Brine Shrimp and Congruence with Larval Morphology

Redón,

Quiroz,

Lukić

et al. 2024

Animals

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Determining molecular markers for parasites provides a useful tool for their identification, particularly for larval stages with few distinguishable diagnostic characters. Avian cestodes play a key role in the food webs and biodiversity of hypersaline wetlands, yet they remain understudied. Using naturally infected Artemia, we identified cestode larvae (cysticercoids), assessed their genetic diversity, and explored phylogenetic relationships in relation to larval morphology and waterbird final hosts. We obtained partial 18S rDNA sequences for 60 cysticercoids of the family Hymenolepidae infecting Artemia spp. from seven localities and three countries (Spain, the USA, and Chile). We present the first DNA sequences for six taxa: Confluaria podicipina, Fimbriarioides sp., Flamingolepis liguloides, Flamingolepis sp. 1, Flamingolepis sp. 2, and Hymenolepis californicus. Intraspecific sequence variation (0.00–0.19% diversity) was lower than intergroup genetic distance (0.7–14.75%). Phylogenetic analysis revealed three main clades: 1—Flamingolepis, 2—Fimbriarioides, 3—Confluaria and Hymenolepis, all of which separated from hymenolepidids from mammals and terrestrial birds. This clear separation among taxa is congruent with previous morphological identification, validating the 18S gene as a useful marker to discriminate at generic/species level. Working with intermediate hosts allows the expansion of knowledge of taxonomic and genetic diversity of cestodes in wildlife, as well as elucidation of their life cycles.

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Section: Molecular Novelties and The Diversity Of Avian Cestodesmentioning

confidence: 99%

Section: Future Directionsmentioning

confidence: 99%

Phylogenetic Relationships of Avian Cestodes from Brine Shrimp and Congruence with Larval Morphology

Redón,

Quiroz,

Lukić

et al. 2024

Animals

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New specimens and molecular data provide validation of Apatemon jamiesoni n. sp. (Trematoda: Strigeidae) from water birds in New Zealand

Presswell

2022

Syst Parasitol

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A study published in 2016 reported on an undescribed species of Apatemon (Strigeidae) from New Zealand that was previously well known from its larval stages. Only a single specimen from a mallard duck was available at the time, which was described and given the provisional name Apatemon sp. “jamiesoni”. Specimens also obtained from a spotted shag were not in good enough condition to form the basis of a new species description. A black-backed gull has since been discovered with specimens of this strigeid, their identity confirmed by genetic similarity, allowing formal description and naming of this species. This paper provides a description of the new specimens from the black-backed gull, along with a comparison with the specimens from other bird hosts, reprises some data from Blasco-Costa et al. (Parasitol Res 115:271–289, 2016) and presents formally the name Apatemon jamiesonin. sp. This species differs from all other species of Apatemon in its small size, particularly that of the ovary and testes. It is most similar to A. jamesi from which it differs in the size of the oral and ventral suckers.

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Black spot diseases in seven commercial fish species from the English Channel and the North Sea: infestation levels, identification and population genetics of Cryptocotyle spp.

Duflot,

Cresson,

Julien

et al. 2023

Parasite

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Fish are often speckled with “black spots” caused by metacercarial trematode infection, inducing a host response. Cryptocotyle spp. (Opisthorchiidae) are among the parasites responsible for this phenomenon. So far, the impact on human health is still unknown. In addition, few publications dealing with black spot recovery, identification, distribution and diversity among commercially important fish are available. Moreover, “black spots” have been observed by fishermen on marine fish, revealing an appreciable but unquantified presence in consumed fish. An epidemiological survey of 1,586 fish from seven commercial species (herring, sprat, whiting, pout, dab, flounder, and plaice) was conducted in the Eastern English Channel and the North Sea in January 2019 and 2020. Encysted metacercariae were found in 325 out of 1,586 fish, with a total prevalence of 20.5%. Intensity of infection varied from 1 to 1,104 parasites. The recorded encysted metacercariae were identified either by microscopic examination or with molecular tools. Partial sequences of the mtDNA cox1 gene and of the rDNA ITS region were obtained. Two species of Cryptocotyle, Cryptocotyle lingua (Creplin, 1825) and Cryptocotyle concava (Creplin, 1825) were found. Metacercariae belonging to other trematode families were also identified. Molecular phylogenetic analysis and haplotype network construction were performed to confirm the identification and to study the potential presence of different populations of Cryptocotyle spp. This survey enabled us to describe the distribution of two species of Cryptocotyle in the English Channel and North Sea ecosystems. The observed differences in infestation levels between fish species and geographical areas will contribute to better understanding of the ecology of these parasites.

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Gastrointestinal helminth parasites of the threatened Australasian crested grebe (Podiceps cristatus australis, Gould 1844) in New Zealand, with descriptions of Baruscapillaria kamanae n. sp. (Nematoda: Trichuridae) and Cryptocotyle micromorpha n. sp. (Trematoda: Opisthorchiidae)

Cited by 4 publications

References 41 publications

Phylogenetic Relationships of Avian Cestodes from Brine Shrimp and Congruence with Larval Morphology

Phylogenetic Relationships of Avian Cestodes from Brine Shrimp and Congruence with Larval Morphology

New specimens and molecular data provide validation of Apatemon jamiesoni n. sp. (Trematoda: Strigeidae) from water birds in New Zealand

Black spot diseases in seven commercial fish species from the English Channel and the North Sea: infestation levels, identification and population genetics of Cryptocotyle spp.

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