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Licensed Unlicensed Requires Authentication Published by De Gruyter September 25, 2015

First report of Schulzia travassosi (Nematoda, Trichostrongylina, Molineoidea) for amphibians of the Chaco region in Argentina and proposal of Oswaldocruzia melanostictusi nov. comb.

Cynthya E. González and Monika I. Hamann
From the journal Acta Parasitologica


This is the first record of the nematode parasite Schulzia travassosi (Trichostrongylina, Molineidae) in two Argentinean amphibians, Leptodactylus bufonius and Rhinella major, collected in two localities of the Chaco region, Las Lomitas (Formosa Province) and Taco Pozo (Chaco Province). The species was observed using light and scanning electron microscopy (SEM) and compared with previous studies of Paraguayan specimens. Regarding metric characters, the measurements found in Argentinean specimens generally did not differ from those of Paraguayan specimens; some differences were observed in the total length of males and females (some longer and some shorter than Paraguayan specimens), length of the oesophagus (in almost all specimens shorter than in Paraguayan ones) and position of the vulva (nearer to posterior end in Argentinean specimens). The branches and sphincter of ovejector are slightly longer than in Paraguayan female specimens. In males, ray 4 is almost the same length as rays 2, 3 and 5, 6. Cephalic end, cephalic vesicle, synlophe and vulvar depression were viewed under SEM. Schulzia melanostictusi Chopra, Shing and Kumar, 1986 is reassigned as Oswaldocruzia melanostictusi (Chopra, Shing and Kumar, 1986) nov. comb.


Boquimpani-Freitas L., Vrcibradic D., Vicente J.J., Bursey C.R., Rocha C.F.D., Van Sluys M. 2001. Helminths of the horned leaf frog, Proceratophrys appendiculata, from southeastern Brazil. Journal of Helminthology, 75, 233-236Search in Google Scholar

Bursey C.R., Goldberg S.R., Telford Jr. S.R. 2006. New species of Schulzia (Nematoda: Molineidae) in Ptychoglossus festae (Squamata: Gymnophthalmidae) from Panama. Journal of Parasitology, 92, 1031-1034. DOI: 10.1645/GE-3555.110.1645/GE-3555.1Search in Google Scholar

Chitwood M.B. 1957. Intraspecific variation in Parasitic Nematodes. Systematic Zoology, 6, 19-23. DOI: 10.2307/241170410.2307/2411704Search in Google Scholar

Chopra A.K., Singh N., Kumar A. 1986. On a new nematode of the genus Schulzia Travassos 1937 (Family: Trichostrongylidae) from Bufo melanostictus from Garhwal Himalaya. Rivista di Parasitologia, 3, 323-325Search in Google Scholar

Durette-Desset M.C. 1985. Trichostrongyloid nematodes and their vertebrate hosts: reconstruction of the phylogeny of a parasitic group. Advances in Parasitology, 24, 239-306. DOI: 10.1016/S0065-308X(08)60564-310.1016/S0065-308X(08)60564-3Search in Google Scholar

Durette-Desset M.C., Baker M.R., Vaucher C. 1985. Helminthes parasites du Paraguay IX. Remaniement et redefinition du genre Schulzia Travassos, 1937. Revue Suisse de Zoologie, 92, 811-82110.5962/bhl.part.81914Search in Google Scholar

Durette-Desset M.C., Florindez D.T., Morales E. 2000. Schulzia chiribita n. sp. (Nematoda, Trichostrongylina, Molineoidea) parasite of Leptodactylus rhodonotus (Amphibian) from Peru. Parasite, 7, 27-30. DOI: 10.1051/parasite/200007102710.1051/parasite/2000071027Search in Google Scholar

González C.E., Hamann M.I. 2006a. Helmintos parasitos de Leptodactylus bufonius Boulenger, 1894 (Anura: Leptodactylidae) de Corrientes, Argentina. Revista Española de Herpetología, 20, 39-46Search in Google Scholar

González C.E., Hamann M.I. 2006b. Nematodes parasitos de Chaunus granulosus major (Muller and Hellmich, 1936) (Anura: Bufonidae) en Corrientes, Argentina. Cuadernos de Herpetología, 20, 43-49Search in Google Scholar

González C.E., Hamann M.I. 2014. Schrankiana chacoensis sp. nov. (Nematoda: Atractidae) from Leptodactylus bufonius Boulenger, 1894 (Anura: Leptodactylidae) from Argentina. Journal of Natural History, 48, 35-49. DOI: 10.1080/00222933.2013.80060810.1080/00222933.2013.800608Search in Google Scholar

Hamann M.I., Kehr A.I., Gonzalez C.E. 2012. Community structure of helminth parasites of Leptodactylus bufonius (Anura: Leptodactylidae) from northeastern Argentina. Zoological Studies, 51, 1454-146310.2478/s11686-006-0045-1Search in Google Scholar

Lent H., Portes Santos C. 1989. Acanthocephalus ula n. sp. (Acanthocephala, Echinorhynchidae) and Schulzia usu n. sp. (Nematoda, Molineidae) described from Atelopus oxyrhynchus (Amphibia) from Venezuela. Revista Brasileira de Biologia, 49, 1085-1091Search in Google Scholar

Levsen A., Berland B. 2002. Post-embryonic development of Camallanus cotti (Nematoda: Camallanidae), with emphasis on growth of some taxonomically important somatic characters. Folia Parasitologica, 49, 231-238. DOI: 10.14411/fp.2002.04210.14411/fp.2002.042Search in Google Scholar

Lux Hoppe E.G., Pedrassani D., Hoffmann-Inocente A.C., Tebaldi J.H., Storti L.F., Zanuzzo F.S., Avancini N., do Nascimento A.A. 2008. Estudos ecologicos em taxocenoses helminticas de Chaunus ictericus (Spix, 1824) e C. schneideri (Werner, 1894) (Anura: Bufonidae) simpatricos, capturados no distrito de Sao Cristovao, municipio de Tres Barras, Santa Catarina. Brazilian Journal of Veterinary Parasitology, 17, 166-169Search in Google Scholar

Mordeglia C., Digiani M.C. 1998. Cosmocerca parva Travassos, 1925 (Nematoda: Cosmocercidae) in Toads from Argentina. Memórias do lnstituto Oswaldo Cruz, 93, 6, 737-738. DOI: 10.1590/s0074-0276199800060000710.1590/S0074-02761998000600007Search in Google Scholar

Travassos L. 1925. Contribucoes para o conhecimento da Fauna Helmintolojica dos Batraquios do Brasil. Sciencia Médica, 3, 673-687Search in Google Scholar

Travassos L. 1937. Revisao da familia Trichostrongylidae Leiper, 1912. Monografías Memórias do Instituto Oswaldo Cruz, 1, 1-512 Search in Google Scholar

Received: 2015-2-3
Revised: 2015-2-24
Accepted: 2015-4-23
Published Online: 2015-9-25
Published in Print: 2015-12-1

W. Stefański Institute of Parasitology, PAS