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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 90, No. 6, 1995, pp. 695-698
Bioline Code: oc95141
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 90, No. 6, 1995, pp. 695-698

 en Neotropical Monogenoidea. 24. Rhinoxenus bulbovaginatus n. sp. (Dactylogyridae, Ancyrocephalinae) from the Nasal Cavity of Salminus maxillosus (Osteichthyes, Characidae) from the Rio Parana, Parana, Brazil
Walter A Boeger; Marcus V Domingues & Gilberto C Pavanelli

Abstract

Rhinoxenus bulbovaginatus n. sp. is described from the nose of
Salminus maxillosus  (Characidae) collected in the basin of
the Rio Parana, near the city of Porto Rico, State of Parana,
Brazil.  The new species can be differentiated from the other
three species in the genus by the morphology of the copulatory
complex, vagina, and ventral anchor.  The sister group
relationship of the known species of Rhinoxenus was determined
using techniques of Phylogenetic Systematics (Cladism).  The
resulting cladogram (C.I.=100%) indicates that the new species
is most closely related to R. piranhus Kritsky, Boeger and
Thatcher, 1988.  The other two species of the genus, R.
arietinus Kritsky, Boeger and Thatcher, 1988 and R. nyttus
Kritsky, Boeger and Thatcher, 1988, both parasites of
Anostomidae fishes, have a paraphyletic position in the
cladogram, suggesting that the origin of at least one of them
can not be associated to cospeciation.

Keywords
Dactylogyridae - Ancyrocephalinae - Rhinoxenus bulbovaginatus n. sp. - Salminus maxillosus - phylogeny

 
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