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1 April 2009 Two New Species of Gyrodactylus von Nordmann, 1832 (Monogenea: Gyrodactylidae) Parasitizing Girardinichthys multiradiatus (Cyprinodontiformes: Goodeidae), an Endemic Freshwater Fish from Central Mexico
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Abstract

Gyrodactylus mexicanus n. sp. and Gyrodactylus lamothei n. sp. are described from the fins and skin of Girardinichthys multiradiatus, an endemic freshwater fish from central Mexico. Gyrodactylus mexicanus is compared to other Gyrodactylus species that parasitize Fundulus spp., the phylogenetically closest group to the Goodeidae from North America. Gyrodactylus mexicanus is distinguished by having large anchors with well-developed superficial roots, enlarged hooks with a proximally disrupted shank (ligament), and a ventral bar with 2 poorly developed anterolateral projections and a small medial process. Gyrodactylus lamothei is distinguished from G. mexicanus and from other species of Gyrodactylus on the North American continent by having anchors with a sclerite on the superficial root and robust hooks with a straight shaft and a recurved point.

Carlos A. Mendoza-Palmero, Ana L. Sereno-Uribe, and Guillermo Salgado-Maldonado "Two New Species of Gyrodactylus von Nordmann, 1832 (Monogenea: Gyrodactylidae) Parasitizing Girardinichthys multiradiatus (Cyprinodontiformes: Goodeidae), an Endemic Freshwater Fish from Central Mexico," Journal of Parasitology 95(2), (1 April 2009). https://doi.org/10.1645/GE-1761.1
Received: 27 June 2008; Accepted: 1 September 2008; Published: 1 April 2009
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