Morphological and molecular data for a new species of Pomphorhynchus Monticelli, 1905 (Acanthocephala: Pomphorhynchidae) in the Mexican redhorse Moxostoma austrinum Bean (Cypriniformes: Catostomidae) in central Mexico
Por:
Garcia-Varela, Martin, Mendoza-Garfias, Berenit, Choudhury, Anindo, Perez-Ponce de Leon, Gerardo
Publicada:
1 nov 2017
Categoría:
Parasitology
Resumen:
Pomphorhynchus purhepechus n. sp. is described from the intestine of the
Mexican redhorse Moxostoma austrinum Bean (Catostomidae) in central
Mexico. The new species can be distinguished from the other seven
described species of Pomphorhynchus Monticelli, 1905 in the Americas by
a subspherical proboscis and 14 longitudinal rows with 16-18 hooks each;
the third and the fourth row of hooks are alternately longest. Sequences
of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene and the
large subunit (LSU) rDNA (including the domains D2-D3) were used to
corroborate the morphological distinction between the new species and
Pomphorhynchus bulbocolli Linkins in Van Cleave, 1919, a species widely
distributed in several freshwater fish species across Canada, USA, and
Mexico. The genetic divergence estimated between the new species and the
isolates of P. bulbocolli ranged between 13 and 14% for cox1, and
between 0.6 and 0.8% for LSU. Maximum likelihood and Bayesian inference
analyses of each dataset showed that the isolates of P. bulbocolli
parasitising freshwater fishes from three families, the Catostomidae,
Cyprinidae and Centrarchidae, represent a separate lineage, and that the
acanthocephalans collected from two localities in central Mexico
comprise an independent lineage. In addition, our analysis of the
genetic variation of P. bulbocolli demonstrates that individuals of this
acanthocephalan from different host species are conspecific. Finally,
the distribution, host-association, and phylogenetic relationship of the
new species, when placed in the context of the region's geological
history, suggest that both host and parasite underwent speciation after
their ancestors became isolated in Central Mexico.
Filiaciones:
Garcia-Varela, Martin:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City, DF, Mexico
Mendoza-Garfias, Berenit:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City, DF, Mexico
Choudhury, Anindo:
St Norbert Coll, Div Nat Sci, 100 Grant St, De Pere, WI 54115 USA
Perez-Ponce de Leon, Gerardo:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City, DF, Mexico
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