Mitogenomic phylogeny of Acanthocephala reveals novel Class relationships
Por:
Gazi, Mohiuddin, Kim, Jiyeon, Garcia-Varela, Martin, Park, Chungoo, Littlewood, D. Tim J., Park, Joong-Ki
Publicada:
1 jul 2016
Resumen:
The Acanthocephala is a phylum of obligate endoparasitic animals
comprising four classes (Archiacanthocephala, Palaeacanthocephala,
Eoacanthocephala and Polyacanthocephala), although the phylogenetic
interrelationships of these classes still remains unresolved. To
investigate phylogenetic relationships of major acanthocephalan groups,
we characterized the complete mitochondrial genome sequences of two
palaeacanthocephalan species Centrorhynchus aluconis and Prosthorhynchus
transversus (representing two different families of the order
Polymorphida), and Polyacanthorhynchus caballeroi (the first mitogenomic
representative of the class Polyacanthocephala) and used these new
sequences for phylogenetic analyses, along with 32 platyzoan mtDNAs,
including 10 additional acanthocephalans. Phylogenetic analyses using
concatenated amino acid sequences for 12 protein-coding genes with
maximum likelihood and Bayesian inference methods supported monophyly of
Acanthocephala. Within the phylum, Archiacanthocephala was positioned as
the sister to the clade containing all three other acanthocephalan
classes, with the polyacanthocephalan species P.caballeroi nested within
Eoacanthocephala. This result contradicts morphology-based
classification systems that treated polyacanthorhynchids as one of the
palaeacanthocephalan families, and instead suggests Polyacanthocephala
is a member of Eoacanthocephala. Within the Palaeacanthocephala,
Polymorphida monophyly was strongly supported and this is inconsistent
with nuclear rDNA-based molecular hypotheses that suggest non-monophyly.
Filiaciones:
Gazi, Mohiuddin:
Chungbuk Natl Univ, Coll Med, Program Cell Biol & Genet, Cheongju 28644, South Korea
Kim, Jiyeon:
Ewha Womans Univ, Div EcoSci, 52 Ewhayeodae Gil, Seoul 03760, South Korea
Garcia-Varela, Martin:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Ave Univ 3000,Ciudad Univ, Mexico City 04510, DF, Mexico
Park, Chungoo:
Chonnam Natl Univ, Sch Biol Sci & Technol, Gwangju 61186, South Korea
Littlewood, D. Tim J.:
Nat Hist Museum, Dept Life Sci, Cromwell Rd, London SW7 5BD, England
Park, Joong-Ki:
Ewha Womans Univ, Div EcoSci, 52 Ewhayeodae Gil, Seoul 03760, South Korea
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