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Molecular data infers the involvement of a marine aurantiactinomyxon in the life cycle of the myxosporean parasite Paramyxidium giardi (Cnidaria, Myxozoa)

Published online by Cambridge University Press:  15 July 2019

S. Rocha Open the ORCID record for S. Rocha [Opens in a new window] ,
Â. Alves ,
C. Antunes ,
C. Azevedo  and
G. Casal
S. Rocha*
Affiliation:
Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Rua Jorge Viterbo Ferreira no. 228, 4050-313 Porto, Portugal Laboratory of Animal Pathology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
Â. Alves
Affiliation:
Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Rua Jorge Viterbo Ferreira no. 228, 4050-313 Porto, Portugal
C. Antunes
Affiliation:
Laboratory of Animal Pathology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal Aquamuseu do Rio Minho, Parque do Castelinho, 4920-290 Vila Nova de Cerveira, Portugal
C. Azevedo
Affiliation:
Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Rua Jorge Viterbo Ferreira no. 228, 4050-313 Porto, Portugal Laboratory of Animal Pathology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
G. Casal
Affiliation:
University Institute of Health Sciences & Institute of Research and Advanced Training in Health Sciences and Technologies, CESPU, Rua Central da Gandra no. 1317, 4585-116 Gandra, Portugal
*
Author for correspondence: S. Rocha, E-mail: [email protected]
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Abstract

An aurantiactinomyxon type is described from the marine naidid Tubificoides pseudogaster (Dahl, 1960), collected from the lower estuary of a Northern Portuguese River. This type constitutes the first of its collective group to be reported from Portugal, and only the fourth described from a marine oligochaete worldwide. Extensive morphological comparisons of new aurantiactinomyxon isolates to all known types without available molecular data are proposed to be unnecessary, given the artificiality of the usage of morphological criteria for actinosporean differentiation and the apparent strict host specificity of the group. Recognition of naidid oligochaetes as the hosts of choice for marine types of aurantiactinomyxon and other collective groups, suggests that the family Naididae played a preponderant role in the myxosporean colonization of estuarine communities. Molecular analyses of the type in study further infer its involvement in the life cycle of Paramyxidium giardi (Cépède, 1906) Freeman and Kristmundsson, 2018, a species that infects the kidney of European eel Anguilla anguilla (Linnaeus, 1758) and that has been reported globally, including from Portuguese waters. The low intraspecific difference registered in relation to Icelandic isolates of P. giardi (0.6%) is hypothesized to result from the emergence of genotypically different subspecies due to geographic isolation.

Keywords

Actinosporemarine oligochaeteMyxosporeaPortugalRiver MinhoSSU rDNA geneTubificoides pseudogaster
Type
Research Article
Information
Parasitology , Volume 146 , Issue 12 , October 2019 , pp. 1555 - 1563
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Copyright © Cambridge University Press 2019 

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