Open Access Open Access  Restricted Access Subscription or Fee Access

A new species of Aplectana (Nematoda: Cosmocercidae) parasite of Pleurodema nebulosum (Anura: Leptodactylidae) from the Monte desert, Argentina, with a key to Neotropical species of the genus Aplectana



Here we describe a new cosmocercid nematode, Aplectana nebulosa sp. nov., from the small and large intestines of Pleurodema nebulosum (Anura: Leptodactylidae), from the Monte desert of San Juan, Argentina. The new species belongs to the Aplectana group that possesses a gubernaculum and unpaired adcloacal papilla anteriorly to cloaca. It resembles A. membranosa, A. paraelenae and A. travassosi by the presence of four adcloacal papillae, but differs from those species by the following characters: number and arrangement of precloacal papillae; number and arrangement of postcloacal papillae; shape and size of spicules and gubernaculum, and by the presence of lateral alae in caudal region of males. The description of the new species is based on light microscopy and scanning electron microscopy (SEM) and we also provide a key to Neotropical species of Aplectana.



Nematoda, Nematode parasite, Amphibians, San Juan Province, Argentina

Full Text:



Baker, M.R. & Vaucher, C. (1986) Parasitic helminths from Paraguay XII: Aplectana Raillet and Henry, 1916 (Nematoda: Cosmocercoidea) from frogs. Revue Suisse de Zoologie, 93, 607–616.

Baker, M.R. (1980) Revision of Old World species of the genus Aplectana Raillet and Henry, 1916 (Nematoda, Cosmocercidae). Bulletin du Museum National d’Histoire Naturelle, Series 4, Sect. A, 2, 955–998.

Baker, M.R. (1987) Synopsis of the Nematoda parasitic in amphibians and reptiles. Memorial University of Newfoundland. Occasional papers in Biology, 11, 1–325.

Benavides, M., Ortiz, J.C. & Jerez, V. (1996) Primer registro parasitológico en Pleurodema thaul Lesson 1826 (Anura, Leptodactylidae). Parasitología al Día, 20 (1/2), 59–62.

Bursey, C.R., Goldberg, S.R. & Kraus, F. (2011) New Species of Aplectana (Nematoda: Cosmocercidae) in Sphenomorphus pratti from Papua New Guinea. Journal of Parasitology, 97 (4), 654–660.

Cabrera, A.L. (1976) Regiones fitogeográficas de la República Argentina. In: ACME (Ed.), Enciclopedia Argentina de Agricultura y Jardinería. Editorial A.C.M.E., Buenos Aires, pp. 1–85

Combes, C. & Laurent, R.F. (1974) Polystoma borelli n. sp. (Monogenea, Polystomatidae) parasites de Pleurodema borelli (Anura, Leptodactylidae) en Republique Argentine. Acta Zoologica Lilloana, 31, 57–64.

Cordero, E.H. (1933) Sur quelques acanthocéphales de l’Amérique méridionale, I. Annales de Parastologie (Paris), 11, 271–279.

Draghi, R., Lunaschi, L.I. & Drago, F.B. (2015) First report of helminth parasitizing Trachycephalus typhonius (Anura: Hylidae) from northeastern Argentina. Revista Mexicana de Biodiversidad, 86, 255–261.

Fabio, S.P. (1971) Sobre uma nova espécie do gênero Neyraplectana Ballesteros Marquez, 1945 (Nematoda, Cosmocercidae). Atas da Sociedade de Biologia do Rio de Janeiro, 15 (1), 11–13.

Fabio, S.P. (1980) Consideraçoes sobre o gênero Oxyascaris Travassos, 1920 (Nematoda, Subuloroidea). Revista Brasileira de Biología, 40 (3), 629–634.

Faivovich, J., Ferraro, D.P., Basso, N.G., Haddad, C.F.D., Rodrigues, M.T., Wheeler, W.C. & Lavilla, E.O. (2012) A phylogenetic analysis of Pleurodema (Anura: Leptodactylidae: Leiuperinae) based on mitochondrial and nuclear gene sequences, with comments on the evolution of anuran foam nests. Cladistics, 1, 1–23.

Ferraro, D.P. & Casagranda, M.D. (2009) Geographic distribution of the genus Pleurodema in Argentina (Anura: Leiuperidae). Zootaxa, 2024, 33–55.

Freitas, J.F. (1958) Estudos sobre "Oxyascarididae" (Travassos, 1920) (Nematoda, Subuluroidea). Memórias do Instituto Oswaldo Cruz, 56 (2), 489–515.

Frost, D. R. (2016) Amphibian Species of the World: an Online Reference. Version 6.0. Electronic Database. American Museum of Natural History, New York, USA. Available from: (accessed 3 April 2016)

Gibbons, L.M. (2010) Keys to the nematode parasites of vertebrates. Supplementary Volume. CAB International and Natural History Museum, London, 146 pp.

Goldberg, S.R., Bursey, C.R. & Morando, M. (2004). Metazoan endoparasites of 12 species of lizard from Argentina. Comparative Parasitology, 71 (2), 208–214.

González, C.E. & Hamann, M.I. (2006) Nematodes parásitos de Chaunus granulosus major (Müller & Hellmich, 1936) (Anura: Bufonidae) en Corrientes, Argentina. Cuadernos de Herpetología, 20 (1), 43–49.

González, C.E. & Hamann, M.I. (2015) Checklist of nematode parasites of amphibians from Argentina. Zootaxa, 3980 (4), 451–476.

González, C.E. & Hamann, M.I. (2016) Nematode parasites of Leptodactylus elenae and Leptodactylus podicipinus (Anura: Leptodactylidae) from Corrientes, Argentina. Comparative Parasitology, 83 (1), 117–121.

González, C.E., Quiroga, L.B. & Sanabria, E.A. (2014) First survey of nematode parasites in introduced American bullfrogs (Lithobates catesbeianus) in Argentina. Comparative Parasitology, 81 (2), 284–287.

González, C.E., Quiroga, L.B., Moreno, D. & Sanabria, E.A. (2013b) Primer registro de Aplectana hylambatis (Nematoda, Cosmocercidae) para anfibios de la Provincia de San Juan. Cuadernos de Herpetología, 27 (2), 155–159.

González, C.E., Sanabria, E.A. & Quiroga, L.B. (2013a) Falcaustra sanjuanensis sp. nov. (Nematoda: Kathlaniidae) from Odontophrynus cf. barrioi (Anura: Cycloramphidae) from Argentina. Acta Parasitologica, 58 (1), 119–125.

Hamann, M.I. & González, C.E. (2015) Helminth parasites in the toad Rhinella major (Bufonidae) from Chaco region, Argentina. Acta Herpetologica, 10 (2), 93–101.

Lent, H. & Teixeira de Freitas, J.F. (1948) Uma coleçao de Nematódeos, parasitos de vertebrados, do Museu de Historia Natural de Montevideo. Memórias do Instituto Oswaldo Cruz, 46, 1–71.

Ramallo, G. & Díaz, F. (1998) Physaloptera lutzi (Nematoda, Physalopteridae) parasite of Liolaemus (Iguania, Tropiduridae) from northwestern Argentina. Boletín chileno de parasitologia, 53, 19–22.

Ramallo, G., Bursey C.R., Goldberg, S.R., Castillo, G. & Acosta, J.C. (2016b) Leptodactylus latrans (Creole Frog). Endoparasites. Herpetology Review, 47, 279–280.

Ramallo, G., Bursey, C.R. & Goldberg, S.R. (2002a) Spauligodon loboi n. sp. (Nematoda: Pharyngodonidae) parasite of Liolaemus spp. (Iguania: Liolaemidae) from Northwestern Argentina. Journal of Parasitology, 88 (2), 370–374.

Ramallo, G., Bursey, C.R. & Goldberg, S.R. (2002b) Parapharyngodon riojensis n. sp. (Nematoda: Pharyngodonidae) from the lizard Phymaturus punae (Squamata: Iguania: Liolaemidae) from Northwestern Argentina. Journal of Parasitology, 88 (5), 979–982.

Ramallo, G., Bursey, C.R. & Goldberg, S.R. (2007) Two new species of Cosmocercids (Ascaridida) in the toad Chaunus arenarum (Anura: Bufonidae) from Argentina. Journal of Parasitology, 93 (4), 910–916.

Ramallo, G., Bursey, C.R. & Goldberg, S.R. (2008a) A new species of Cosmocercidae (Ascaridida) in the worm lizard, Amphisbaena bolivica (Squamata: Amphisbaenidae), from Argentina. Journal of Parasitology, 94 (6), 1361–1363.

Ramallo, G., Bursey, C.R. & Goldberg, S.R. (2008b) New species of Aplectana (Ascaridida: Cosmocercidae) in the toads, Rhinella granulosa and Rhinella schneideri (Anura: Bufonidae) from northern Argentina. Journal of Parasitology, 94 (6), 1357–1360.

Ramallo, G., Bursey, C.R., Castillo, G. & Acosta, J.C. (2016a) New species of Parapharyngodon (Nematoda: Pharyngodonidae) in Phymaturus spp. (Iguania: Liolaemidae) from Argentina. Acta Parasitologica, 61 (3), 461–465.

Ramallo, G., Goldberg, S., Bursey, C., Castillo, G. & Acosta, J.C. (2017) Thubunaea eleodori sp. nov. (Nematoda: Physalopteridae) from Liolaemus eleodori (Sauria: Liolaemidae) from Argentina. Parasitology Research, 116 (1), 293–297.

Sarmiento, L., Tantaleán, M. & Huiza, A. (1999) Nemátodos parásitos del hombre y de los animales en el Perú. Revista peruana de parasitología, 14, 9–65.

Schaefer, E.F., Hamann, M.I., Kehr, A.I., González, C.E. & Duré, M.I. (2006) Trophic, reproductive and parasitological aspects of the ecology of Leptodactylus chaquensis (Anura: Leptodactylidae) in Argentina. Herpetological Journal, 16, 387–394.

Teles, D.A., Sousa, J.G.G., Teixeira, A.A.M., Silva, M.C., Oliveira, R.H., Silva, M.R.M. & Ávila, R.W. (2015) Helminths of the frog Pleurodema diplolister (Anura, Leiuperidae) from the Caatingain Pernambuco State, Northeast Brazil. Brazilian Journal of Biology, 75, 251–253.

Warner, T.T. (2004) Desert Meteorology. Cambridge University Press, New York, 268 b/w illus., 11 colour illus., 30 tables.



  • There are currently no refbacks.

ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand