Parasitology Research

, Volume 117, Issue 12, pp 3953–3963 | Cite as

Ortholinea concentrica n. sp. (Cnidaria: Myxozoa) from the Patagonian seabass Acanthistius patachonicus (Jenyns, 1840) (Perciformes: Serranidae) off Patagonia, Argentina

  • Gema Alama-BermejoEmail author
  • Jesús S. Hernández-Orts
Original Paper


The Patagonian seabass Acanthistius patachonicus (Jenyns, 1840) (Serranidae) is a marine fish valued for commercial and sport fisheries from Argentina. We report a new myxosporean (Cnidaria: Myxozoa) infecting the urinary system of the Patagonian seabass from San Antonio Bay, San Matías Gulf, on the Atlantic Ocean. The mature myxospores were subspherical, 8.2–11.0 μm × 7.9–11.0 μm and 7.7–9.0 μm in thickness; two subspherical polar capsules, 2.4–3.8 μm × 2.3–3.6 μm, with 3 to 4 turns of the polar tubule; openings on different valves in almost opposite directions. Ornamented shell valves exhibited 17–20 concentrically organized surface ridges. SSU rDNA phylogenetics analyses placed the new species in the freshwater urinary tract clade, clustering in a clade formed by Myxobilatus gasterostei (Parisi, 1912), Acauda hoffmani Whipps, 2011, and other Ortholinea spp. Based on spore morphology, site of infection, and molecular data, we described this myxozoan as Ortholinea concentrica n. sp.


Myxozoa Marine fish Urinary system South America Taxonomy SSU rDNA Phylogeny 



We are grateful to Dennis Landete, Juan Saad, and Pablo Jerez for their assistance during the collection of the seabass and to Martina Tesařová for electron microscopy assistance (Laboratory of Electron Microscopy, Institute of Parasitology, Czech Academy of Sciences).


This study received funding from the Czech Science Foundation (Grant No. 14–28784P and P505/12/G112).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable institutional, national and international guidelines for the care and use of animals were followed.


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© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos Almirante Storni (CIMAS – CCT CONICET – CENPAT)San Antonio OesteArgentina
  2. 2.Institute of ParasitologyBiology Centre of the Czech Academy of SciencesČeské BudějoviceCzech Republic

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