Phenotypic plasticity, genetic structure and systematic position of Neoechinorhynchus emyditoides Fisher, 1960 (Acanthocephala: Neoechinorhynchidae): a parasite of emydid turtles from the Nearctic and Neotropical regions
Por:
Sereno-Uribe, Ana Lucia, Lopez-Jimenez, Alejandra, Gonzalez-Garcia, Marcelo Tonatiuh, Pinacho-Pinacho, Carlos Daniel, Macip Rios, Rodrigo, Garcia-Varela, Martin
Publicada:
1 jun 2022
Resumen:
The taxonomy of the 10 recognized Neoechinorhynchus species associated
with emydid turtles is complex due to the morphological conservatism. In
the present study, specimens of N. emyditoides from northern and
southeastern Mexico exhibit great phenotypic plasticity on its
diagnostic characteristics. We sequenced three molecular markers: the
internal transcribed spacers ITS1, ITS2 and 5.8S gene, the D2 + D3
domains of the large subunit from nuclear DNA and cytochrome c oxidase
subunit I (cox1) from mitochondrial DNA. Sequences of the nuclear
molecular markers were aligned and compared with other congeneric
species associated with emydids available in GenBank. Phylogenetic
analyses supported the polyphyly of Neoechinorhynchus. The species from
emydids formed a Glade, which was subdivided into five subclades that
correspond with each species analysed (N. pseudemydis, N. chrysemydis,
N. emydis, N. schmidti and N. emyditoides). To understand better the
genetic structure of N. emyditoides a haplotype network was inferred
with 29 cox1 sequences, revealing the presence of 13 haplotypes, two of
which were shared and 11 were unique. The high values of fixation index,
F-st (0.4227-0.8925) detected between the two populations from
southeastern and the two from northern Mexico indicated low genetic flow
among the populations. Our data suggest that the Neoechinorhynchus
species associated with emydid turtles diversified in the eastern USA
and that of N. emyditoides expanded its distribution range reached
southeastern Mexico.
Filiaciones:
Sereno-Uribe, Ana Lucia:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Lopez-Jimenez, Alejandra:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Posgrado Ciencias Biol, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Gonzalez-Garcia, Marcelo Tonatiuh:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Posgrado Ciencias Biol, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Pinacho-Pinacho, Carlos Daniel:
Inst Ecol AC, Investigador Catedras CONACyT, Red Estudios Mol Avanzados, Km 2-5 Ant Carretera Coatepec, Xalapa 91070, Veracruz, Mexico
Macip Rios, Rodrigo:
Univ Nacl Autonoma Mexico, Escuela Nacl Estudios Super, Unidad Morelia, Edificio Invest & Posgrado, Morelia, Michoacan, Mexico
Garcia-Varela, Martin:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
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