Rhinoxenus nyttus Kritsky, Boeger & Thatcher, 1988

Domingues, Marcus V. & Boeger, Walter A., 2005, Neotropical Monogenoidea. 47. Phylogeny and coevolution of species of Rhinoxenus (Platyhelminthes, Monogenoidea, Dactylogyridae) and their Characiformes hosts (Teleostei, Ostariophysi) with description of four new species, Zoosystema 27 (3), pp. 441-467 : 451-452

publication ID

https://doi.org/ 10.5281/zenodo.5402419

DOI

https://doi.org/10.5281/zenodo.5477806

persistent identifier

https://treatment.plazi.org/id/E56987BF-FFA0-FFD6-9E10-0F71FEB9FBDF

treatment provided by

Marcus

scientific name

Rhinoxenus nyttus Kritsky, Boeger & Thatcher, 1988
status

 

Rhinoxenus nyttus Kritsky, Boeger & Thatcher, 1988 View in CoL

( Fig. 1 View FIG C-E)

Rhinoxenus nyttus Kritsky, Boeger & Thatcher, 1988: 92 View in CoL , 93, figs 18-24.

TYPE HOST AND LOCALITY. — Nasal cavities of Schizodon fasciatus (Anostomidae) , Ilha Marchantaria, Rio Solimões, near Manaus, Amazonas, Brazil, 25.XI.1983.

MATERIAL EXAMINED. — Brazil. Usina Hidrelétrica de ITAIPU, Foz do Iguassu, Paraná, from Schizodon sp. (Anostomidae) , 15.X.1996, voucher specimens ( CHIOC 36292 a-c; INPA 433; MNHN 167 HG-T 1 208-208 bis; USNPC 95235). — Rio Capucapu, Cachoeira das Garças, near Manaus, Amazonas, from Leporinus agassizii (Anostomidae) , 30.X.1989, voucher specimens ( INPA 434; USNPC 95236).

COMPARATIVE MEASUREMENTS. — See Table 5.

REMARKS

Rhinoxenus nyttus is apparently restricted to members of Anostomidae . The specimens analyzed here are similar to those described by Kritsky et al. (1988), except by the possession of a more extensive sclerotized cap on the root ventral anchor ( Fig. 1E View FIG ). The original description does not mention the presence of the brims of the MCO, observed in all studied specimens ( Fig. 1C, D View FIG ). Parasites of each host species present little variation in size in almost all the analyzed structures.

Rhinoxenus nyttus is characterized by possessing a ventral bar with lateral projections that serve as articulation to the ventral anchor; long chaliceshape vaginal vestibule; and ventral anchor with wavy point, representing 1/3 of the total length of the anchor.

CHIOC

Helminthological Collection of Oswaldo Cruz Institute (Coleccion. Helmintologica del Instituto Oswaldo Cruz)

INPA

Instituto Nacional de Pesquisas da Amazonia

MNHN

Museum National d'Histoire Naturelle

USNPC

United States National Parasite Collection

Kingdom

Animalia

Phylum

Platyhelminthes

Class

Monogenea

Order

Dactylogyridea

Family

Ancyrocephalidae

Genus

Rhinoxenus

Loc

Rhinoxenus nyttus Kritsky, Boeger & Thatcher, 1988

Domingues, Marcus V. & Boeger, Walter A. 2005
2005
Loc

Rhinoxenus nyttus

KRITSKY D. C. & BOEGER W. A. & THATCHER V. E. 1988: 92
1988
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