Unexpected morphological and molecular diversity of trematode (Haploporidae: Forticulcitinae) parasites of mullets from the ocean Pacific coasts in Middle America
Por:
Andrade-Gomez, L., Garcia-Varela, M.
Publicada:
1 ene 2021
Resumen:
Two new genera and four new species from subfamily Forticulcitinae are
described from the intestines of white mullet (Mugil curema) and
flathead grey mullet (Mugil cephalus) collected in 27 localities across
a wide geographical range on Pacific Ocean slopes comprising three
countries in Middle America: Mexico, Guatemala and Costa Rica. The new
genera Ekuarhuni n. gen. and Overstreetoides n. gen. had to be erected
to accommodate two new species, Ekuarhuni papillatum n. sp. and
Overstreetoides pacificus n. sp., with unique morphological traits that
differentiate them from the two genera described previously. In
addition, two new species, Forticulcita minuta n. sp. and Forticulcita
isabelae n. sp., were described, which were characterized as exhibiting
a small body size (< 1100 mu m long). These new species were classified
as the diminutive morphotype, together with three other congeneric
species of Forticulcita. Forticulcita minuta n. sp. is distinguished by
being the smallest species within the genus (< 305 mu m). Meanwhile,
Forticulcita isabelae n. sp. is distinguished by its body size and
testis length. In specimens of the four new species, sequencing was
performed with two molecular markers, the large subunit (LSU) and the
internal transcribed spacer 2 (ITS2) of nuclear rDNA, and the results
were compared with other sequences available in GenBank. Phylogenetic
analyses performed with the combined dataset of the two nuclear
molecular markers (LSU + ITS2) placed all the analysed species within
the clade of Forticulcitinae with strong bootstrap support (100%) and a
high Bayesian posterior probability (1.0). The four new species showed
differences in abundance in their definitive hosts and were widely
distributed along the Pacific Ocean coasts of Mexico, Guatemala and
Costa Rica, in Middle America.
Filiaciones:
Andrade-Gomez, L.:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Ciencias Biol, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Garcia-Varela, M.:
(Corresponding Author), Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
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