Abstract
Based on a morphological approach, five species of cyclocoelids (Digenea: Cyclocoelidae) are revised based on material from birds in Mexico. The species studied are: Cyclocoelum cf. leidyi Harrah, 1922 from the black-necked stilt Himantopus mexicanus Müller (Recurvirostridae); Cyclocoelum mutabile (Zeder, 1800) from the northern jacana Jacana spinosa L. (Jacanidae) and the willet Tringa semipalmata Gmelin (Scolopacidae); Cyclocoelum pseudomicrostomum Harrah, 1922 from the American coot Fulica americana Gmelin (Rallidae); Selfcoelum lamothei Blend & Dronen, 2008, from the long-billed curlew Numenius americanus Bechstein (Scolopacidae); and Neohaematotrephus arayae Zamparo, Brooks, Causey & Rodriguez, 2003 from J. spinosa. New morphological data, illustrations and measurements are presented for these trematodes. Three species, insufficiently described, i.e. C. cf. leidyi, C. mutabile and C. pseudomicrostomum, are redescribed in detail. Our results indicate morphological variation in some important features used in the diagnosis of Cyclocoelum Brandes, 1892 (i.e. the presence or absence of oral sucker, the position of the genital pore relative to the pharynx, and the posterior extension of the uterus) and Selfcoelum Dronen, Gardner & Jiménez, 2006 (i.e. anterior extension of vitelline follicles). Finally, this study provides the first molecular data for the large subunit of the ribosomal RNA (28S rRNA) gene for N. arayae.
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Acknowledgements
We are indebted to Drs Norman Dronen and Aneta Kostadinova for their review, comments and suggestions to improve our manuscript. The authors are grateful to Carlos Mendoza Palmero, Ulises Razo and Mirza Ortega Olivares for their help during the field work. Our special thanks are due to Carlos D. Pinacho-Pinacho for his technical assistance collecting the birds and in the molecular analyses. Thanks are also due to Luis García Prieto for providing specimens from the CNHE, and to Susana Guzmán Gómez for her advice on the use of the stereomicroscope.
Funding
This study was supported by the Programa de Apoyo a Proyectos de Investigación e Inovación Tecnológica (PAPIIT No IN206716), the Consejo Nacional de Ciencia y Tecnología (CONACYT) (No. 179048) and the Czech Science Foundation (project ECIP P505/12/G112). A.L.J. benefited from a Master student grant from the Programa de Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México (scholarship number 308181829) and from the CONACYT of the Mexican Government (scholarship number 706116).
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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 Mexican government through the Secretaría de Medio Ambiente y Recursos Naturales (SEMARNAT) to MGV.
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This article is part of the Topical Collection Digenea.
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López-Jiménez, A., García-Varela, M. & Hernández-Orts, J.S. Review of five species of cyclocoelids (Digenea: Cyclocoelidae) from aquatic birds in Mexico with notes on their interspecific variation. Syst Parasitol 95, 921–942 (2018). https://doi.org/10.1007/s11230-018-9825-x
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DOI: https://doi.org/10.1007/s11230-018-9825-x