Life cycle inference and phylogeny of Ortholinea labracis n. sp (Myxosporea: Ortholineidae), a parasite of the European seabass Dicentrarchus labrax (Teleostei: Moronidae), in a Portuguese fish farm

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Rangel, LF (Author) Other; Rocha, S (Author) Other; Casal, G (Author) Other; Castro, R (Author) Other; Severino, R (Author) Other; Azevedo, C (Author) Other; Cavaleiro, F (Author) Other; Santos, MJ (Author) FCUP

Journal

Title: Journal of Fish Diseases

Vol. 40

Pages: 243-262

ISSN: 0140-7775

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 19 Citations

Other information

Authenticus ID: P-00M-KB7

DOI: 10.1111/jfd.12508

Abstract (EN): Ortholinea labracis n. sp. is described and its life cycle is inferred from a Southern Portuguese fish farm, with basis on microscopic and molecular procedures. This myxosporean parasite infects the urinary bladder of the European seabass Dicentrarchus labrax and the intestinal epithelium of a marine oligochaete of the genus Tectidrilus. Myxospores subspherical in valvular view and ellipsoidal in sutural view measuring 7.6 +/- 0.3 (6.8-8.7) mu m in length, 7.2 +/- 0.2 (6.7-7.7) mu m in width and 6.5 +/- 0.4 (5.8-7.7) mu m in thickness. Two polar capsules, 3.0 +/- 0.2 (2.6-3.4) mu m long and 2.4 +/- 0.1 (2.0-2.9) mu m wide, located at the same level, but with divergent orientation and opening to opposite sides of the suture line. Sequencing of the SSU rRNA gene revealed a similarity of 100% between the analysed myxospores and triactinomyxon actinospores. The phylogenetic setting of O. labracis n. sp. shows subgrouping in correlation with tissue tropism, but identifies this parasite as another exception to the main division of Myxosporea into the main freshwater and marine lineages.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 20