ERECTION OF IBIRHYNCHUS GEN. NOV (ACANTHOCEPHALA: POLYMORPHIDAE), BASED ON MOLECULAR AND MORPHOLOGICAL DATA
Por:
Garcia-Varela, M, de Leon, GPP, Aznar, FJ, Nadler, SA
Publicada:
1 feb 2011
Resumen:
The genus Southwellina is composed of 3 described species, i.e., S. hispida (the type species), S. dimorpha, and S. macracanthus. All 3 are endoparasites of fish-eating birds that have worldwide distributions. Morphologically, the genus is characterized by possessing a short and compact trunk, 2 fields of spines in the anterior region of the trunk (in at least I sex), a short cylindrical proboscis (sometimes with a swollen region armed with numerous longitudinal rows of hooks), a double-walled proboscis receptacle, and 4 tubular cement glands in males. In the current study, specimens identified as S. dimorpha were collected from Eudocimus albus (white ibis), the type host from the Gulf of Mexico. Sequences of 2 nuclear genes (small subunit [SSU] and long subunit [LSU] ribosomal DNA) and 1 mitochondrial gene (cytochrome c oxidase subunit I [cox I]) of S. dimorpha and S. hispida were obtained and used to reconstruct the phylogenetic relationships of both species with respect to published
Filiaciones:
Garcia-Varela, M:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, Mexico
de Leon, GPP:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, Mexico
Aznar, FJ:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, Mexico
Nadler, SA:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, Mexico
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