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The philometrid nematode Philometroides acreanensis n. sp. from the stomach wall of the catfish Pimelodus blochii in north-western Brazil

Published online by Cambridge University Press:  09 March 2017

P.H.O. Cavalcante ,
F. Moravec  and
C.P. Santos
P.H.O. Cavalcante
Affiliation:
Instituto Federal do Acre – IFAC, Xapuri, AC, Brazil
F. Moravec
Affiliation:
Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 37005 České Budějovice, Czech Republic
C.P. Santos*
Affiliation:
Laboratório de Avaliação e Promoção a Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil, 4.365, Manguinhos, Rio de Janeiro, 21040-360, Brazil
*
*E-mail: cpsantos@ioc.fiocruz.br
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Abstract

A new nematode species, Philometroides acreanensis n. sp. (Philometridae), is described from female specimens recovered from the stomach wall of the freshwater catfish Pimelodus blochii Valenciennes (Pimelodidae) collected in the Acre River (Amazon River basin), Acre State, Brazil. Based on examination by light and scanning electron microscopy, the new species differs from the two other South American congeneric species mainly in the body length of the gravid female (240–280 mm), the length of the oesophagus (1.25 mm in holotype) representing 0.5% of the entire body length, the range of cuticular embossment, as well as the location in the host (stomach), order of the fish host (Siluriformes) and the geographical distribution (Amazon River drainage system). This is the third known species of Philometroides Yamaguti, 1935 reported from South America. A key to species of Philometroides occurring in the fish of America is provided.

Type
Research Papers
Information
Journal of Helminthology , Volume 92 , Issue 1 , January 2018 , pp. 109 - 115
Copyright
Copyright © Cambridge University Press 2017 

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