Morphological and molecular characterization of Henneguya cardii n. sp. (Cnidaria: Myxosporea) from the bulbus arteriosus of European seabass Dicentrarchus labrax (Teleostei: Moronidae)

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Rangel, LF (Autor) Outra; Severino, R (Autor) Outra; Santos, MJ (Autor) FCUP; Rocha, S (Autor) Outra

Revista

Título: Parasitology

Páginas: 1-8

ISSN: 0031-1820

Editora: Cambridge University Press

Indexação

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Outras Informações

ID Authenticus: P-017-D5P

DOI: 10.1017/s0031182024001112

Abstract (EN): A new species of Myxobolidae, Henneguya cardii n. sp., is described infecting the European seabass Dicentrarchus labrax, a fish of high commercial value intensively cultivated in southern Europe. Henneguya cardii n. sp. was found in the bulbus arteriosus and spleen with a prevalence of infection of 13.5%. In the heart, it forms irregular whitish plasmodia measuring 1 mm in size. Mature myxospores are broadly obovoid in frontal view and ellipsoidal in lateral view, with 2 equal caudal appendages. Polar capsules are ovoid and symmetric, with 3-4 polar tubule coils. Myxospores measure 10.2 +/- 0.6 (8.8-11.6) mu m in length, 8.0 +/- 0.7 (5.3-8.8) mu m in width and 5.6 +/- 0.2 (5.1-6.4) mu m in thickness. Caudal appendages are 36.6 +/- 3.2 (27.4-42.9) mu m long. Total spore length is 47.6 +/- 3.2 (41.2-53.2) mu m. Polar capsules measure 4.0 +/- 0.2 (3.4-4.6) by 2.2 +/- 0.1 (1.9-2.6) mu m. Small subunit ribosomal RNA-based tree topologies position H. cardii n. sp. within a lineage of marine myxobolids that is mostly comprised of other Henneguya species. Host-relatedness is reinforced as the main evolutionary driver for myxobolids, with the positioning of H. cardii n. sp. further suggesting tissue tropism as another important evolutionary driver for marine heart infecting Henneguya. Nonetheless, the inner complexity of this lineage suggests that identification of the evolutionary patterns driving its phylogeny will require discovery of the true diversity of marine myxobolids.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8