SYSTEMATIC POSITION OF PSEUDOCORYNOSOMA AND ANDRACANTHA (ACANTHOCEPHALA, POLYMORPHIDAE) BASED ON NUCLEAR AND MITOCHONDRIAL GENE SEQUENCES
Por:
Garcia-Varela, M, de Leon, GPP, Aznar, FJ, Nadler, SA
Publicada:
1 feb 2009
Resumen:
Species of Pseudocorynosoma are North and South American acanthocephalans that use waterfowl as definitive hosts and amphipods as intermediate hosts, whereas species of Andracantha occur in fish-eating birds with a worldwide distribution. Pseudocorynosoma and Andracantha were originally described as Corynosoma (now restricted to endoparasites of marine mammals). Morphologically, Andracantha is distinct from other genera of Polymorphidae in possessing 2 fields of spines on the trunk, whereas Corynosoma and Pseudocorynosoma have a single field. A recent phylogenetic hypothesis based on morphological characters suggested that Andracantha is closely related to Corynosoma, whereas Pseudocorynosoma was of uncertain phylogenetic position within the Polymorphidae. To test the systematic affinities of these 3 genera, we sequenced 2 nuclear genes (SSU and LSU ribosomal DNA) and I mitochondrial gene (cytochrome c oxidase subunit 1; cox 1) of species representing Corynosoma, Andracantha, and Pseud
Filiaciones:
Garcia-Varela, M:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, Mexico
de Leon, GPP:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, Mexico
Aznar, FJ:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, Mexico
Nadler, SA:
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City 04510, DF, Mexico
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