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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. 689-694
Bioline Code: oc95140
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 90, No. 6, 1995, pp. 689-694

 en Neotropical Monogenoidea. 23. Two New Species of Gyrodactylus (Gyrodactylidae) from a Cichlid and an Erythrinid Fish of Southeastern Brazil
Walter A Boeger & Flavio Popazoglo

Abstract

Two new species of Gyrodactylus Nordmann, 1832
(Platyhelminthes, Monogenoidea) are described from fishes
collected from southeastern Brazil.   Gyrodactylus
geophagensis n. sp. was collected from the body surface of the
"cara", Geophagus brasiliensis (Quoy and Gaimard, 1824)
(Cichlidae), from the Rio da Guarda, State of Rio de Janeiro;
its major diagnostic features are the morphology of the anchor
with a short, truncate superficial root and the shape of the
hooks  - with a long, delicate shaft.  Gyrodactylus trairae n.
sp. parasitizes the body surface of the"traira", Hoplias aff.
malabaricus (Bloch, 1794) (Erythrinidae), from the Rio Guandu,
State of Rio de Janeiro and can be easily differentiated from
other species of the genus by having a thin, dorsal bridge,
connecting the superficial bar with the spathulated shield. 
These are the first species of Gyrodactylus formally reported
from Brazil. Presently, 26 species of Gyrodactylidae are known
from freshwater fishes in the Neotropical Region; a list of
these species is provided.

Keywords
Platyhelminthes - Gyrodactylidae - Gyrodactylus geophagensis n. sp. - Gygrodactylus trairae n. sp. - Geophagus brasiliensis - Hoplias aff. malabaricus - Brazil

 
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