Morphological and molecular data reveal a new species of Neoechinorhynchus (Acanthocephala: Neoechinorhynchidae) from Dormitator maculatus in the Gulf of Mexico
Por:
Pinacho-Pinacho, CD, Sereno-Uribe, AL, Garcia-Varela, M
Publicada:
1 dic 2014
Resumen:
Neoechinorhynchus (Neoechinorhynchus) mexicoensis sp. n. is described
from the intestine of Dormitator maculatus (Bloch 1792) collected in 5
coastal localities from the Gulf of Mexico. The new species is mainly
distinguished from the other 33 described species of Neoechinorhynchus
from the Americas associated with freshwater, marine and brackish fishes
by having smaller middle and posterior hooks and possessing a small
proboscis with three rows of six hooks each, apical hooks longer than
other hooks and extending to the same level as the posterior hooks, 1
giant nucleus in the ventral body wall and females with eggs longer than
other congeneric species. Sequences of the internal transcribed spacer
(ITS) and the large subunit (LSU) of ribosomal DNA including the domain
D2 + D3 were used independently to corroborate the morphological
distinction among the new species and other congeneric species
associated with freshwater and brackish water fish from Mexico. The
genetic divergence estimated among congeneric species ranged from 7.34
to 44% for ITS and from 1.65 to 32.9% for LSU. Maximum likelihood and
Bayesian inference analyses with each dataset showed that the 25
specimens analyzed from 5 localities of the coast of the Gulf of Mexico
parasitizing D. maculatus represent an independent clade with strong
bootstrap support and posterior probabilities. The morphological
evidence, plus the monophyly in the phylogenetic analyses, indicates
that the acanthocephalans collected from intestine of D. maculatus from
the Gulf of Mexico represent a new species, herein named N. (N.)
mexicoensis sp. n. (C) 2014 Published by Elsevier Ireland Ltd.
Filiaciones:
Pinacho-Pinacho, CD:
Univ Nacl Autonoma Mexico, Inst Biol, Posgrad Ciencias Biol, Mexico City 04510, DF, Mexico
Sereno-Uribe, AL:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, Mexico
Garcia-Varela, M:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, Mexico
|