Cosmocerca parva Travassos, 1925 (Nematoda: Cosmocercidae) in Toads from Argentina

Abstract

This note enlarges the known morphological variability of C. parva in a new host and makes amend for previous descriptions with the aid of scanning electron microscope (SEM) at the same time that presents the first record of Cosmocerca species in Argentina. Specimens of Bufo granulosus major Müller & Hellmich, 1936 (Anura: Bufonidae) were captured in Corrientes, Argentina. Nematodes were recovered from the posterior intestine, killed and fixed in hot water (80ºC), (D Gibson 1984 Syst Parasitol 6: 241-255), stored in 70º ethyl alcohol, and cleared in lactophenol for further examination. Drawings were made with the aid of a Zeiss Standard 25 light microscope with camera lucida. Specimens studied by SEM were dehydrated in ethanol series, dried using the critical point technique, coated with gold, and examined with a Jeol JSMT 100 microscope.

Dieta y parasitismo de Leptodactylus diptyx (Anura: Leptodactylidae) del nordeste argentino

“…Los cosmocercidos, son parásitos comunes del intestino de anfibios y reptiles, presentan ciclos de vida directos (monoxeno) y las larvas infectantes ingresan al hospedador por vía oral (Aplectana) o a través de la piel (Cosmocerca) (Anderson, 2000). Previamente han sido hallados cosmocercidos de estos géneros en numerosas especies de anuros neotropicales, incluyendo varias del nordeste argentino, entre ellos Pseudopaludicola falcipes, Rhinella major, R. fernandezae, R. bergi, R. schneideri, Leptodactylus bufonius, L. chaquensis, L. latinasus, Physalaemus santafecinus, Scinax nasicus, S. acuminatus, Odontophrynus americanus, Dendropsophus nanus, D. sanborni e Hypsiboas raniceps (Mordeglia y Digiani, 1998;González y Hamann, 2004;, 2006bHamann et al, 2006aHamann et al, , 2006bGonzález y Hamann, 2007;González y Hamann, 2008;González y Hamann, 2009a, 2009bHamann et al, 2009;González y Hamann, 2010;González y Hamann, 2011).…”

Study of Helminth Parasites of Amphibians by Scanning Electron Microscopy

“…Up to the present, studies performed with scanning electron microscopy techniques on helminth parasites of Argentinean amphibians have included three families of nematodes: Rhabdiasidae, Rhabdias füelleborni (González and Hamann, 2008), Cosmocercidae, Cosmocerca parva, C. podicipinus, Aplectana hylambatis, A. adaechevarriae (González and Hamann, 2010b;Mordeglia and Digiani, 1998;Ramallo et al, 2008) and Physalopteridae, Physaloptera sp. (González and Hamann, 2010b), and one family of trematodes: Diplostomidae, Lophosicyadiplostomum aff.…”

“…Of all the anuran families, the most studied for helminth parasites are Hylidae, Bufonidae, Leiuperidae and Leptodactylidae. Nine species of hylids have been studied for helminth parasites, but only one of these studies included SEM: Scinax nasicus (González and Hamann, 2008;; similarly, seven species of bufonids have been studied for helminth parasites, but SEM was employed in only two cases: Rhinella schneideri and R. granulosa (González and Hamann, 2008;Mordeglia and Digiani, 1998;Ramallo et al, 2008), finally, six species of leiuperids and leptodactylids have been studied for helminth parasites, but only one of them was analyzed with SEM, the leiuperid Physalaemus santafecinus (González and Hamann, 2010b).…”

New Genus, New Species of Cestoda (Anoplocephalidae), New Species of Nematoda (Cosmocercidae) and Other Helminths in Cyrtodactylus Louisiadensis (Sauria: Gekkonidae) From Papua New Guinea

“…Scolex (N ϭ 7) 137 Ϯ 22 (110-171) wide by 120 Ϯ 20 (100-140) long, with four oval suckers, 97 Ϯ 9 (85-110) ϫ 70 Ϯ 11 (61-92), long axes parallel to that of cestode. Protonephridial system of 4 Baker and Green (1988) Baker and Green (1988) Johnston and Simpson (1942) Moravec and Sey (1990) This article Neotropical C. brasiliense Travassos, 1925 C. chilensis Lent and Frietas, 1948 C. cruzi Rodrigues and Fabio, 1970 C. longispicula Moravec and Kaiser, 1994 Lent and Freitas (1948) Rodrigues and Fabio (1970a) Moravec and Kaiser (1994) C. paraguayensis Moravec and Kaiser, 1994 ϭ C. ornata sensu Baker and Vaucher, 1984 Frog 83-108 106-122 4-5 Baker and Vaucher (1984) C. parva Travassos, 1925ϭ C. freitasi Silva, 1954 Frog 90-110 85-108 5-7 Mordeglia and Digiani (1998) C. podicipinus Baker andVaucher, 1984 ϭ C. panamaensis Martinez andMaggenti, 1989 C. rara Freitas and Vicente, 1966 C. travassosi Rodrigues and Fabio, 1970C. uruguayensis Lent and Freitas, 1948C.…”