Morphological and molecular analyses of a new species of Saccocoelioides Szidat, 1954 (Haploporidae Nicoll, 1914) in the fat sleeper Dormitator maculatus (Bloch) (Perciformes: Eleotridae) from the Gulf of Mexico
Por:
Andrade-Gomez, L., Pinacho-Pinacho, C. D., Hernandez-Orts, J. S., Sereno-Uribe, A. L., Garcia-Varela, M.
Publicada:
1 jul 2017
Resumen:
Saccocoelioides olmecae n. sp. is described from specimens recovered
from the intestine of the fat sleeper Dormitator maculatus (Bloch)
(Perciformes: Eleotridae) collected in six localities along the coast of
the Gulf of Mexico. The new species is mainly distinguished from the
other three described species of Saccocoelioides Szidat, 1954 from North
and Middle America (i.e. S. sogandaresi Lumsden, 1963, S. chauhani
Lamothe-Argumedo, 1974 and S. lamothei Aguirre-Macedo &
Violante-Gonzalez, 2008) by having an elongated body, a sac-like caecum,
a uterus that extends to the first third of body and by having vitelline
follicles longitudinally elongated reaching the posterior end of the
body. Sequences of the large subunit (LSU) of the ribosomal DNA,
including the domain D1-D3, and the internal transcribed spacer 2 (ITS2)
were used independently and concatenated to corroborate the
morphological distinction among S. olmecae n. sp., S. chauhani and S.
lamothei from freshwater and brackish-water fish from Middle America.
The genetic divergence estimated among the three species of
Saccocoelioides was very low: 1% for LSU and from 1 to 4% for ITS2.
Maximum likelihood and Bayesian inference analyses for each dataset and
both datasets combined revealed that S. olmecae n. sp. represents an
independent clade with moderate bootstrap support and posterior
probabilities. This is the third species of Saccocoelioides described in
Mexico, and the 17th species from the Americas.
Filiaciones:
Andrade-Gomez, L.:
Univ Nacl Autonoma Mexico, Inst Biol, Posgrad Ciencias Biol, AP 70-153, Ciudad De Mexico 04510, Mexico
Pinacho-Pinacho, C. D.:
Univ Nacl Autonoma Mexico, Inst Biol, Posgrad Ciencias Biol, AP 70-153, Ciudad De Mexico 04510, Mexico
Hernandez-Orts, J. S.:
Univ Nacl Comahue, Inst Biol Marina & Pesquera Almirante Storni, Guemes 1030, RA-8520 San Antonio Oeste, Rio Negro, Argentina
Sereno-Uribe, A. L.:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, AP 70-153, Ciudad De Mexico 04510, Mexico
Garcia-Varela, M.:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, AP 70-153, Ciudad De Mexico 04510, Mexico
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