Molecular phylogeny of Corynosoma lühe, 1904 (Acanthocephala), based on 5.8S and internal transcribed spacer sequences
Por:
García-Varela M., Aznar F.J., Pérez-Ponce De León G., Piñero D., Laclette J.P.
Publicada:
1 ene 2005
Resumen:
Species of Corynosoma (Acanthocephala) are distributed worldwide as parasites of marine mammals and sea birds. Species diagnosis is based on morphological characters, including the size and number of hooks in the proboscis and the number of spines in the dorsal and ventral regions of the body. We inferred the phylogenetic relationships of 10 nominal species of Corynosoma through analysis of internal transcribed spacers (ITS-1, ITS-2) and 5.8S ribosomal RNA sequences. Nucleotide distances between species of Corynosoma ranged from 0.4 to 11% for ITS sequences. Maximum parsimony and likelihood analyses indicated that species of Corynosoma that inhabit hosts in the marine environment form a monophyletic assemblage, but yielded conflicting hypotheses for the relationship of Corynosoma cetaceum to other members of the genus. However, parsimony and likelihood analyses were consistent for many Corynosoma sister species relationships of (e.g., C. australe plus C. bullosum, C. validum plus C. villosum, C. caspicum plus C. magdaleni, and C. enhydri plus C. strumosum). This phylogenetic framework was used to evaluate taxonomic controversies concerning C. cetaceum and C. caspicum. © American Society of Parasitologists 2005.
Filiaciones:
García-Varela M.:
Departamento de Inmunología, Instituto de Investigaciones Biomédicas, UNAM, A.P. 70228, 04510 México D.F., Mexico
Aznar F.J.:
Departamento de Inmunología, Instituto de Investigaciones Biomédicas, UNAM, A.P. 70228, 04510 México D.F., Mexico
Departamento de Biología Animal, Instituto Cavanilles de Biodiversidad y Biologia Evolutiva, Universitat de Valencia, Burjasot, Valencia, Spain
Pérez-Ponce De León G.:
Departamento de Inmunología, Instituto de Investigaciones Biomédicas, UNAM, A.P. 70228, 04510 México D.F., Mexico
Departamento de Zoología, Instituto de Biología, UNAM, A.P. 70228, 04510 México D.F., Mexico
Piñero D.:
Departamento de Inmunología, Instituto de Investigaciones Biomédicas, UNAM, A.P. 70228, 04510 México D.F., Mexico
Departamento de Ecología Evolutiva, Instituto de Ecología, UNAM, A.P. 70228, 04510 México D.F., Mexico
Laclette J.P.:
Departamento de Inmunología, Instituto de Investigaciones Biomédicas, UNAM, A.P. 70228, 04510 México D.F., Mexico
|