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Parasitol Int. 2019 Jun;70:102-111. doi: 10.1016/j.parint.2019.02.009. Epub 2019 Feb 26.

Morphological and molecular characterisation of a new species of Gyrodactylus von Nordmann, 1832 (Monogenoidea: Gyrodactylidae) of cichlid fishes (Perciformes) from Mexico.

Author information

1
Department of Botany and Zoology, Masaryk University, Kotlářská 267/2, 61137 Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Faculty of Science, University of South Bohemia, Branišovská 31, 37005 České Budějovice, Czech Republic. Electronic address: cmpamtheus@yahoo.es.
2
Natural History Museum of Geneva, P.O. Box 6134, CH-1211 Geneva, Switzerland.
3
Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-153, Código Postal 04510 México, D. F., Mexico.

Abstract

Gyrodactylus mojarrae n. sp. is described from the gills of the Neotropical cichlids Thorichthys maculipinnis, Rocio octofasciata, Vieja zonata and V. fenestrata from several localities across southern Mexico. The new species is erected on the basis of the morphology of the haptoral elements (anchors, bars and hooks), and its phylogenetic position within the Gyrodactylidae is evaluated based on the analysis of partial sequences of the ITS1, 5.8 rRNA gene and ITS2. Gyrodactylus mojarrae n. sp. differs from other congeneric species by having hooks with a straight shaft and recurved point, pointed toe and convex heel, presence of reduced superficial anchor roots, by the number and disposition of spinelets of the male copulatory organ, and the absence of shield and lateral processes of the superficial bar. Molecular circumscription of isolates of G. mojarrae n. sp. from different host and hydrological basins showed that these isolates are conspecific and represent a distinct lineage from other congeners, including newly sequenced isolates of Gyodactylus sp. A and Gyrodactylus sp. B from Astyanax mexicanus (Characidae) and Gobiomorus dormitor (Eleotridae), respectively. Genetic affinities of Gyodactylus sp. A and B indicate that they might represent undescribed species infecting freshwater fish from the Americas.

KEYWORDS:

Characidae; Cichlidae; DNA; Eleotridae; Gyrodactylus mojarrae; Internal transcribed spacers; Mexico

PMID:
30822532
DOI:
10.1016/j.parint.2019.02.009
[Indexed for MEDLINE]

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