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Morphological and molecular characterization of Maritrema kostadinovae n. sp. (Digenea: Microphallidae) from the yellow-crowned night heron Nyctanassa violacea (Aves: Ardeidae) in Mexico

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Abstract

A new species of microphallid trematode was collected from the intestine of the yellow-crowned night heron Nyctanassa violacea (L.) (Pelecaniformes: Ardeidae) from Veracruz, Mexico. Maritrema kostadinovae n. sp. differs distinctly from other members of Maritrema Nicoll, 1907 from the Americas by its smaller body size (262–435 × 242–363 μm), the extension of caeca (reaching to anterior level of ventral sucker), the size and shape of the cirrus (short, tubular and unarmed) and metraterm (simple and thin-walled), the position of the genital pore (sinistrolateral to ventral sucker) and the arrangement of the vitellaria (horseshoe-shaped with posteriorly directed opening). Maximum likelihood and Bayesian inference analyses, based on partial 28S rDNA sequences, depicted M. kostadinovae n. sp. within the genus Maritrema with strong support. The new species is in a sister position to other available members of Maritrema, except for M. subdolum Jägerskiöld, 1909 that branches as the early divergent species in the Maritrema clade. The new species is the third species of Maritrema described from birds in Mexico. Comparative morphometric data for Maritrema taxa from birds and mammals from the Americas is provided.

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Acknowledgements

We are grateful to Sergio Martorelli and Bronwen Presswell for kindly providing literature on microphallids. We are indebted to David Hernández-Mena, Ivan Fiala and Pavla Bartošová-Sojková for their assistance with the phylogenetic analyses. The authors express their gratitude to Luis García Prieto, David Osorio Sarabia, Berenit Mendoza Garfias and Francisco E. Montero for their comments on the morphological characterization of the cirrus of the new species.

Funding

This study was supported in part by the Programa de Apoyo a Proyectos de Investigación e Innovación Tecnológica (PAPIIT No. IN207219) and the Czech Science Foundation (project ECIP P505/12/G112). JSH-O benefited from a postdoctoral fellowship of the National Council of Science and Technology (CONACYT), Mexico (postdoctoral number 177603).

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Correspondence to Jesús S. Hernández-Orts.

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The authors declare that they have no competing interests.

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All applicable institutional, national and international guidelines for the care and use of animals were followed. Birds were collected under the collecting permit FAUT 0202 issued by the Secretaría de Medio Ambiente y Recursos Naturales (SEMARNAT) of Mexico to MGV.

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Section Editor: Hiroshi Sato

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Hernández-Orts, J.S., Capasso, S., Pinacho-Pinacho, C.D. et al. Morphological and molecular characterization of Maritrema kostadinovae n. sp. (Digenea: Microphallidae) from the yellow-crowned night heron Nyctanassa violacea (Aves: Ardeidae) in Mexico. Parasitol Res 119, 1785–1793 (2020). https://doi.org/10.1007/s00436-020-06682-8

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  • DOI: https://doi.org/10.1007/s00436-020-06682-8

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