Pseudascarophis brasiliensis sp. nov. (Nematoda: Cystidicolidae) parasitic in the Bermuda chub Kyphosus sectatrix (Perciformes: Kyphosidae) from southeastern Brazil

Felipe Bisaggio Pereira,Jose Luis Luque,Aldenice De Nazare Pereira,Juan Tomas Timi

doi:10.1590/s0074-0276108042013013

Abstract

A new species of Pseudascarophis (Nematoda: Cystidicolidae) found in the stomach of Kyphosus sectatrix (Linnaeus) (Kyphosidae), off Rio de Janeiro, Brazil, is described. The new species can be differentiated from the other congeners by the presence of lateral alae, distinct but inconspicuous cephalic papillae at the anterior end, three pairs of precloacal and one pair of adcloacal papillae in males, egg morphology and morphometry of glandular oesophagus and spicules. Pseudascarophis tropica is transferred to Ascarophis as Ascarophis tropica (Solov'eva) comb. n. due to its ambiguous diagnosis.

Highlights

During a parasitological survey, cystidicolid nematodes belonging to Pseudascarophis Ko, Margolis and Machida were recovered from stomachs of the Bermuda chub Kyphosus sectatrix (Linnaeus) (Kyphosidae) from the coastal zone of the state of Rio de Janeiro (RJ), Brazil
The present paper describes a new Pseudascarophis infecting K. sectatrix, a fish widely distributed in western Atlantic from Canada to Brazil, and found in eastern Atlantic from South Morocco to the Gulf of Guinea and more rarely in Mediterranean and off Madeira (Froese & Pauly 2012)
The taxonomy and classification of Cystidicolidae has been complex because this group of nematodes exhibit small size; some of their morphologically important features are visible only by scanning electron microscopy (SEM) (Moravec 2007, Moravec & Justine 2010)

Summary

Introduction

Cystidicolid nematodes belonging to Pseudascarophis Ko, Margolis and Machida were recovered from stomachs of the Bermuda chub Kyphosus sectatrix (Linnaeus) (Kyphosidae) from the coastal zone of the state of Rio de Janeiro (RJ), Brazil. The present paper describes a new Pseudascarophis infecting K. sectatrix, a fish widely distributed in western Atlantic from Canada to Brazil, and found in eastern Atlantic from South Morocco to the Gulf of Guinea and more rarely in Mediterranean and off Madeira (Froese & Pauly 2012). This fish inhabits shallow waters and is commonly found around coral reefs, feeding on benthic algae, small crabs and mollusks (Froese & Pauly 2012)

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