A new species of Wallinia Pearse, 1920 (Digenea: Allocreadiidae) in Astyanax mexicanus (Characidae) from Mexico revealed by morphology and sequences of the 28S ribosomal RNA gene
Por:
de Leon, GPP, RazoMendivil, U, MendozaGarfias, B, RubioGodoy, M, Choudhury, A
Publicada:
20 feb 2015
Categoría:
Parasitology
Resumen:
Wallinia mexicana sp. n. is described from the Mexican tetra, Astyanax
mexicanus (De Filippi) (Characidae Weitzman), from two localities in
northern Mexico. The new species can be distinguished from the two
congeneric species, described from small-bodied characids in South and
Central America, mainly by the posterior extent of the vitelline
follicles (halfway between the posterior testis and the end of the
caeca), by having a larger oesophagus, testes that are always oblique,
and eye-spot remnants. The distinct status of the new species was
confirmed by molecular data (28S rRNA gene sequences). Phylogenetic
analysis suggests the new species is the sister species of W. chavarriae
Choudhury, Hartvigsen et Brooks, 2002 described from characids in
northwestern Costa Rica. Additionally, genetic divergence between these
congeners reached 3.3%, a value higher than that observed for closely
related species pairs of allocreadiids for that molecular marker. Based
on these new findings, recently published records of this new species as
Magnivitellinum simplex Kloss, 1966 and Creptotrematina aguirrepequenoi
Jimenez-Guzman, 1973 in Astyanax mexicanus from Durango and San Luis
Potosi states, respectively, are corrected.
Filiaciones:
de Leon, GPP:
Univ Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Mexico City 04510, DF, Mexico
MendozaGarfias, B:
Univ Nacl Autonoma Mexico, Inst Biol, Lab Helmintol, Mexico City 04510, DF, Mexico
Bronze
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