Phylogenetic affinities of Forticulcitinae (Haploporidae) parasites of mullet from the Americas, with the description of three new species and notes on the genera and key species
Por:
Andrade-Gomez, Leopoldo, Gonzalez-Garcia, M. T., Garcia-Varela, M.
Publicada:
1 ago 2021
Ahead of Print:
1 jun 2021
Categoría:
Parasitology
Resumen:
Members of Forticulcitinae Blasco-Costa, Balbuena, Kostadinova & Olson,
2009 include endoparasites of mullet fishes distributed worldwide. Adult
specimens were collected from the intestines of white mullet (Mugil
curema) and flathead grey mullet (Mugil cephalus) from five localities
in the Gulf of Mexico and a single locality in Venezuela.
Photogenophores were sequenced for two nuclear molecular markers, the
large subunit (LSU) and second internal transcribed spacer (ITS2) of
nuclear rDNA. The new sequences were aligned with other sequences
downloaded from GenBank. The maximum likelihood and Bayesian inferences
were deduced using the combined dataset (LSU + ITS2). The phylogenetic
analyses revealed four new lineages belonging to Forticulcitinae. Three
new species are described in the present study. Ekuarhuni mexicanusn.
sp. can be differentiated from its congeneric species by presenting a
longer hermaphroditic sac length (136-180 mu m) and a wider testis
(91-123 mu m). Forticulcita macropharyngisn. sp. and Forticulcita
venezuelensisn. sp. are the 8th and 9th species described in
Forticulcita. Both species belong to the diminutive morphotype of
Forticulcita. Forticulcita macropharyngisn. sp. can be morphologically
distinguished from the other congeneric species by the presence of a
massive and muscular pharynx (46-110 mu m long, 74-106 mu m wide).
Forticulcita venezuelensisn. sp. is the second species of the studied
genus recorded in South America and can be differentiated from
congeneric species by possessing the largest testis (138-201 mu m long,
83-100 mu m wide). Finally, the fourth lineage corresponds to
Overstreetoides Andrade-Gomez & Garcia-Varela, 2021; however, few
specimens of this lineage were collected, precluding any description of
the species. In addition, a key is proposed for differentiating the
genera and species of Forticulcitinae.
Filiaciones:
Andrade-Gomez, Leopoldo:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Posgrad Ciencias Biol, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Gonzalez-Garcia, M. T.:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Garcia-Varela, M.:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
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