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Morphological and molecular characterization of Henneguya cystigena n. sp. (Cnidaria, Myxosporea) parasitizing the alimentary tract of yellowfin seabream, Acanthopagrus latus , in the East China Sea
by
Zhang, Bo
, Yin, Fei
in
Acanthopagrus latus
/ alimentary tract
/ Animals
/ Appendages
/ China - epidemiology
/ Classification
/ Cnidaria
/ Cysts
/ DNA, Ribosomal - chemistry
/ DNA, Ribosomal - genetics
/ Fish Diseases - epidemiology
/ Fish Diseases - parasitology
/ Gastrointestinal tract
/ Gastrointestinal Tract - parasitology
/ Henneguya
/ Marine fish
/ Morphology
/ Myxosporea
/ Myxospores
/ myxozoa
/ Myxozoa - classification
/ Myxozoa - genetics
/ Myxozoa - isolation & purification
/ Myxozoa - ultrastructure
/ New species
/ Nucleotide sequence
/ Oceans and Seas
/ Parasitic Diseases, Animal - epidemiology
/ Parasitic Diseases, Animal - parasitology
/ Phylogeny
/ Physical characteristics
/ Ribosomal DNA
/ Sea Bream - parasitology
/ ssu rdna
/ Taxonomy
/ ultrastructure
2025
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Morphological and molecular characterization of Henneguya cystigena n. sp. (Cnidaria, Myxosporea) parasitizing the alimentary tract of yellowfin seabream, Acanthopagrus latus , in the East China Sea
by
Zhang, Bo
, Yin, Fei
in
Acanthopagrus latus
/ alimentary tract
/ Animals
/ Appendages
/ China - epidemiology
/ Classification
/ Cnidaria
/ Cysts
/ DNA, Ribosomal - chemistry
/ DNA, Ribosomal - genetics
/ Fish Diseases - epidemiology
/ Fish Diseases - parasitology
/ Gastrointestinal tract
/ Gastrointestinal Tract - parasitology
/ Henneguya
/ Marine fish
/ Morphology
/ Myxosporea
/ Myxospores
/ myxozoa
/ Myxozoa - classification
/ Myxozoa - genetics
/ Myxozoa - isolation & purification
/ Myxozoa - ultrastructure
/ New species
/ Nucleotide sequence
/ Oceans and Seas
/ Parasitic Diseases, Animal - epidemiology
/ Parasitic Diseases, Animal - parasitology
/ Phylogeny
/ Physical characteristics
/ Ribosomal DNA
/ Sea Bream - parasitology
/ ssu rdna
/ Taxonomy
/ ultrastructure
2025
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Morphological and molecular characterization of Henneguya cystigena n. sp. (Cnidaria, Myxosporea) parasitizing the alimentary tract of yellowfin seabream, Acanthopagrus latus , in the East China Sea
by
Zhang, Bo
, Yin, Fei
in
Acanthopagrus latus
/ alimentary tract
/ Animals
/ Appendages
/ China - epidemiology
/ Classification
/ Cnidaria
/ Cysts
/ DNA, Ribosomal - chemistry
/ DNA, Ribosomal - genetics
/ Fish Diseases - epidemiology
/ Fish Diseases - parasitology
/ Gastrointestinal tract
/ Gastrointestinal Tract - parasitology
/ Henneguya
/ Marine fish
/ Morphology
/ Myxosporea
/ Myxospores
/ myxozoa
/ Myxozoa - classification
/ Myxozoa - genetics
/ Myxozoa - isolation & purification
/ Myxozoa - ultrastructure
/ New species
/ Nucleotide sequence
/ Oceans and Seas
/ Parasitic Diseases, Animal - epidemiology
/ Parasitic Diseases, Animal - parasitology
/ Phylogeny
/ Physical characteristics
/ Ribosomal DNA
/ Sea Bream - parasitology
/ ssu rdna
/ Taxonomy
/ ultrastructure
2025
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Morphological and molecular characterization of Henneguya cystigena n. sp. (Cnidaria, Myxosporea) parasitizing the alimentary tract of yellowfin seabream, Acanthopagrus latus , in the East China Sea
Journal Article
Morphological and molecular characterization of Henneguya cystigena n. sp. (Cnidaria, Myxosporea) parasitizing the alimentary tract of yellowfin seabream, Acanthopagrus latus , in the East China Sea
2025
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Overview
A novel myxosporean species was identified. The species formed spherical to ellipsoidal pseudocysts within the alimentary tract wall of a yellowfin seabream Acanthopagrus latus fished in the East China Sea. Histological examination confirmed that pseudocysts were localized within the submucosal layer of the stomach wall. Round to ellipsoidal myxospores exhibited two posterior caudal appendages, consistent with the morphological characteristics of the genus Henneguya . The myxospore body measured 9.6 ± 0.5 (8.6–10.6) μm in length, 7.3 ± 0.4 (6.8–7.9) μm in width, and 6.0 ± 0.2 (5.5–6.4) μm in thickness. Two equal pyriform polar capsules were observed, measuring 3.5 ± 0.3 (2.9–4.4) μm × 1.9 ± 0.2 (1.4–2.2) μm. Pairwise comparison referring to small subunit ribosomal DNA sequence revealed a highest identity of 94.19% with Henneguya yokoyamai Li et al. , 2012, supporting the classification of the specimens as a new species, Henneguya cystigena n. sp. Phylogenetic analyses demonstrated intermixed groupings of myxobolid species, highlighting persistent discrepancies between traditional morphological taxonomy and increasingly refined molecular phylogeny. To the best of our knowledge, this study represents the first description of a Henneguya species parasitizing a marine fish in the East China Sea near mainland China. Une nouvelle espèce de Myxosporea a été identifiée, qui formait des pseudokystes sphériques à ellipsoïdaux dans la paroi du tube digestif d’un Pagre à nageoires jaunes, Acanthopagrus latus , pêché en mer de Chine orientale. L’examen histologique a confirmé la localisation des pseudokystes dans la couche sous-muqueuse de la paroi stomacale. Les myxospores rondes à ellipsoïdales présentaient deux appendices caudaux postérieurs, compatibles avec les caractéristiques morphologiques du genre Henneguya . Le corps de la myxospore mesurait 9,6 ± 0,5 (8,6–10,6) μm de longueur, 7,3 ± 0,4 (6,8–7,9) μm de largeur et 6,0 ± 0,2 (5,5–6,4) μm d’épaisseur. Deux capsules polaires piriformes égales ont été observées, mesurant 3,5 ± 0,3 (2,9–4,4) μm × 1,9 ± 0,2 (1,4–2,2) μm. La comparaison par paires des séquences de la petite sous-unité de l’ADN ribosomique a révélé que l’identité la plus élevée était 94,19% avec Henneguya yokoyamai Li et al. , 2012, ce qui soutient la classification des spécimens comme une nouvelle espèce, Henneguya cystigena n. sp. Les analyses phylogénétiques ont mis en évidence des regroupements mixtes d’espèces de Myxobolidae, soulignant des divergences persistantes entre la taxonomie morphologique traditionnelle et une phylogénie moléculaire de plus en plus affinée. À notre connaissance, cette étude constitue la première description d’une espèce d’ Henneguya parasitant un poisson marin en mer de Chine orientale, près de la Chine continentale.
Publisher
EDP Sciences
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