First report of helminth parasitizing Trachycephalus typhonius (Anura: Hylidae) from northeastern Argentina

Abstract

Two species of nematodes, Rhabdias cf. elegans (Rhabdiasidae) and Aplectana hylambatis (Cosmocercidae), were recovered from the lungs and intestine of Trachycephalus typhonius (Anura: Hylidae) captured in Formosa Province, Argentina. Morphological and morphometric data of both species are provided, and previous records of Rhabdias spp. in the Neotropical region are summarized. The finding of Rhabdias cf. elegans constitutes the first record of this genus in the Formosa Province, and the finding of A. hylambatis represents the first record of this species as a parasite of hylid frogs, and the first report in Formosa Province. Trachycephalus typhonius represents a new host for both parasites.

Morphological variation of Aplectana hylambatis (Nematoda: Cosmocercidae) from different anuran hosts and localities in Argentina

“…In order to compare the morphological characters, we considered only those studies where morphological data for the species presented adequately, such as Baylis (1927), R.O. Gutiérrez (unpublished data), Masi Pallarés and Maciel (1974), Baker (1980), andDraghi et al (2015). The great revisions of the family Cosmocercidae made by Travassos (1931) and Ballesteros-Márquez (1945) repeated the information of Baylis (1927).…”

“…Specifically, in Argentina, it was found in eight species of anuran amphibians, R. achalensis, R. arenarum, R. major (Müller and Hellmich, 1936), Leptodactylus latinasus (Jiménez de la Espada, 1875), L. chaquensis (Cei, 1950) L. bufonius (Boulenger, 1894) Physalaemus santafecinus (Barrio, 1965) and Trachycephalus typhonius (Linnaeus, 1758) (Draghi et al 2015.…”

A new species of Cosmocercoides (Nematoda; Cosmocercidae) and other helminths in Leptodactylus latrans (Anura; Leptodactylidae) from Argentina

“…In the Neotropical region, has been observed in different countries (Peru, Paraguay, Uruguay, Brazil) and anuran families, for example, Bufonidae, Ceratophrydae, Hylidae, Leptodactylidae, Leuperidae and Microhylidae (González et al 2013, Campião et al 2014, 2016, Aguiar et al 2015. In Argentina, it is the species of parasitic nematodes of amphibians with the greatest geographical distribution and was found parasitizing Bufonidae, Leptodactylidae and Hylidae from Buenos Aires, Córdoba, Corrientes, Formosa, Salta and San Juan Provinces (González et al 2013, González & Hamann 2015, Draghi et al 2015. Remarks: For the specific identification we consider the review of the genus Aplectana carried out by Baker (1980) and the subsequent synonyms and descriptions performed by Baker & Vaucher (1986), González et al (2013) andPiñeiro Gomez et al (2017).…”

“…It has subsequently been found in several amphibian hosts of the Neotropical realm (for a list of host species for Rhabdias spp. see Draghi et al 2015). In Argentina, it has been also found parasitizing R. arenarum from Salta (Sueldo & Ramírez 1976), Rhinella major (Müller & Hellmich 1936) from Chaco and Formosa Provinces (Hamann & González 2015) and Rhinella diptycha (Cope, 1862), L. bufonius and Odontophrynus americanus (Duméril & Bibron, 1841) from Corrientes Province (González & Hamann 2006 Other reported hosts and geographic range in South America: In South America P. lutzi has been recorded on numerous occasions parasitizing amphibians and reptiles from Uruguay (Cordero 1933), Peru (Tantaleán 1976, Tantaleán et al 2005, Chero et al 2016 Remarks: Although the totality of the specimens recovered from L. latrans were females, characteristics such as the cylindrical trunk without spines, widened in the anterior region and rounded at its posterior end (6 x 1.05 mm); the cylindrical proboscis, with 16 longitudinal and alternating rows of 5-6 hooks each, progressively increasing in size towards the base; the cylindrical proboscis receptacle, with a double wall and cerebral ganglia near its base; digitiform to claviform lemnisci, not much longer than the receptacle; genital apparatus occupying an average of 9.9% of the total length of the trunk and composed of an uterine bell, uterus and vagina; ovoid eggs without polar extensions and the ventral and subterminal genital pore, allowed the identification.…”

Diversidad de la helmintofauna de anuros de la región pampeana: un estudio comparativo en ambientes antagónicos

“…En Argentina, la mayoría de los estudios parasitológicos en anfibios han sido dados a conocer mediante registros aislados de carácter taxonómico, que incluyen la descripción de nuevas especies para la ciencia, nuevos registros hospedatorios y/o geográficos para especies ya conocidas (p.ej. Gutierrez 1945;Suriano 1970;Combes & Laurent 1974;Ostrowsky de Nuñez 1978Mordeglia & Digiani 1998;Ramallo et al 2007;Arredondo et al 2009;Gonzalez Rivas et al 2012;Draghi et al 2015) y compendios o "checklists" (Lunaschi & Drago 2007;. En los últimos años, se ha avanzado notablemente en estudios de índole ecológica en la provincia de Corrientes (Kehr & Hamann 2003;Hamann et al 2006a;2006b;2012;2013a;2013b;2014a, 2014b.…”