A new species of Contracaecum (Nematoda: Anisakidae) found parasitizing Nannopterum brasilianus (Suliformes: Phalacrocoracidae) and Hoplias argentinensis (Characiformes: Erythrinidae) in South America: morphological and molecular characterization of larval and adult stages.
J Helminthol
; 94: e184, 2020 Aug 27.
Article
em En
| MEDLINE
| ID: mdl-32847645
ABSTRACT
Nematode species of the genus Contracaecum Railliet & Henry, 1912 have been reported around the world in many species of fish-eating birds and seals. Here, Contracaecum jorgei n. sp. is morphologically described using light and scanning electron microscopy for adults and fourth-stage larvae (L4) found in the bird Nannopterum brasilianus and third-stage larvae (L3) found in the freshwater fish Hoplias argentinensis, both from the province of Córdoba, Argentina. Additionally, sequences of cytochrome c oxidase subunit II were obtained from these specimens and molecular phylogenetic analysis was used to determine its relationships within the genus. The present species is distinguished from other species by the number and disposition of cephalic papillae; shape and size of the interlabia; length of the spicules; and number and arrangement of papillae in the posterior end of the male. Furthermore, in the molecular analyses, sequences obtained from adult L4 and L3 specimens of C. jorgei n. sp. were similar and grouped, forming an independent lineage, thus confirming it as a distinct species. Thus, morphological characteristics associated with molecular data support the proposal of a new species.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Aves
/
Anisakis
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Anisaquíase
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Caraciformes
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Larva
Limite:
Animals
País/Região como assunto:
America do sul
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Argentina
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Brasil
Idioma:
En
Revista:
J Helminthol
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Brasil