Larval nematodes found in amphibians from northeastern Argentina

Ce González,Mi Hamann

doi:10.1590/s1519-69842010000500026

Ce González, Mi Hamann

Open Access

https://doi.org/10.1590/s1519-69842010000500026

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Abstract

Five species of amphibians, Leptodactylus podicipinus, Scinax acuminatus, S. nasicus, Rhinella fernandezae and Pseudis paradoxa, were collected in Corrientes province, Argentina and searched for larval nematodes. All larval nematodes were found as cysts in the serous of the stomach of hosts. Were identified one superfamily, Seuratoidea; one genus, Spiroxys (Superfamily Gnathostomatoidea) and one family, Rhabdochonidae (Superfamily Thelazioidea). We present a description and illustrations of these taxa. These nematodes have an indirect life cycle and amphibians are infected by consuming invertebrate, the intermediate hosts. The genus Spiroxys and superfamily Seuratoidea were reported for the first time for Argentinean amphibians.

Highlights

Adult amphibians play an important role in the life cycle of different species of nematode parasites, principally when they act as paratenic hosts
Studies of nematodes in Argentinean amphibians showed larval stages in different families of these vertebrates, such as Physaloptera Rudolphi, 1819 that it found in gastric mucosa of families Bufonidae, Leptodactylidae and Leiuperidae (Gutierrez et al, 2005; González and Hamann, 2006a,b, 2007a, 2008), Contracaecum Railliet and Henry, 1912 found in mesentery of Hyla nana Boulenger, 1889 and Serpinema cf. trispinosum found in the intestine of Lysapsus limellum Cope, 1862 (Hamann and Kehr, 1998; González and Hamann, 2007b)
A total of 28 nematodes were collected from 74 amphibians examined

Summary

Introduction

Adult amphibians play an important role in the life cycle of different species of nematode parasites, principally when they act as paratenic hosts. Studies of nematodes in Argentinean amphibians showed larval stages in different families of these vertebrates, such as Physaloptera Rudolphi, 1819 that it found in gastric mucosa of families Bufonidae, Leptodactylidae and Leiuperidae (Gutierrez et al, 2005; González and Hamann, 2006a,b, 2007a, 2008), Contracaecum Railliet and Henry, 1912 found in mesentery of Hyla nana Boulenger, 1889 and Serpinema cf trispinosum found in the intestine of Lysapsus limellum Cope, 1862 (Hamann and Kehr, 1998; González and Hamann, 2007b) All of these nematodes require the presence of an invertebrate intermediate host in their life cycle. We present a description and illustrations of these taxa

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