Rhabdias glaurungi sp. nov. (Nematoda: Rhabdiasidae), parasite of Scinax gr. ruber (Laurenti, 1768) (Anura: Hylidae), from the Brazilian Amazon

Abstract

The genus Rhabdias Stiles & Hassal, 1905 includes about 83 species of nematodes parasitic in amphibians and reptiles worldwide. Herein, we describe Rhabdias glaurungi sp. nov. from the hylid frog Scinax gr. ruber (Laurenti, 1768) in the Gunma Ecological Park, Santa Bárbara municipality, state of Pará, Brazil. This species has six small lips, an inflated cuticle along the entire body and a cup-shaped buccal capsule with smooth internal surface of its anterior part and irregularly folded internal surface of its posterior part in apical view. From the 17 valid species recognized in the Neotropical realm, the new species can be distinguished by the number of lips, the morphology and size of its buccal capsule, as well as the extent and shape of its cuticular inflation; in addition, there are molecular differences. Sequences of the mitochondrial Cytochrome c Oxidase subunit I gene strongly support the status of this form as a separate species. Molecular phylogenetic analysis shows R. glaurungi sp. nov. nested within the R. pseudosphaerocephala Kuzmin, Tkach & Brooks, 2007 species complex. Rhabdias glaurungi sp. nov. is the second species of the genus described from hosts of the family Hylidae in the Neotropical realm. We conclude that the diversity of Rhabdias within the Neotropics is likely largely underestimated.

A new species of Rhabdias (Nematoda: Rhabdiasidae), a lung parasite of Pseudopaludicola pocoto (Anura: Leptodactylidae) from north-eastern Brazil: description and phylogenetic analyses

“…Based on the oral structure arrangement, the new species resembles those from the group are characterized by having six lips (four submedian and two lateral lips): Rhabdias androgyna Kloss, 1971, Rhabdias breviensis, Rhabdias fuelleborni Travassos, 1926, Rhabdias galactonoti Kuzmin, Melo, Filho & Santos, 2016, R. glaurungi , Rhabdias manantlanensis Martínez-Salazar, 2008, and Rhabdias stenocephala Kuzmin, Melo, Filho & Santos, 2016 (Martínez-Salazar, 2008; Nascimento et al ., 2013; Kuzmin et al , 2015; Kuzmin et al , 2016; Willkens et al , 2019). We will also compare R. pocoto n. sp.…”

“…sp., the new host, record in the Caatinga biome and molecular data, we herein propose a new species, and will compare the new taxon with only those species reported in the Neotropical region which are morphologically similar to R. pocoto n. sp. However, as proposed by Willkens et al (2019), we will not use the species Rhabdias mucronata Schuurmans-Stekhoven, 1952, and Rhabdias truncata Schuurmans-Stekhoven, 1952 for comparison, as the author described those species based only on juvenile forms (Schuurmans-Stekhoven, 1952).…”

“…Morphological measurements are given as the values of the holotype followed by the mean of the paratypes, and range in parentheses (reported in micrometres, unless otherwise indicated) in accordance with the standardization proposed by Willkens et al (2019).…”

“…Nevertheless, the knowledge of parasite species such as representatives of Rhabdias is poor, and only eight species have been described in amphibians (four in Bufonidae, two in Leptodactylidae, one in Dendrobatidae and one in Hylidae) (Kuzmin & Tkach, 2020). Among the 18 known species of Rhabdias described from the Neotropical region, until now only Rhabdias breviensis Nascimento, Gonçalves, Melo, Giese, Furtado & Santos, 2013 and Rhabdias glaurungi Willkens, Rebêlo, Santos, Furtado, Vilela, Tkach, Kuzmin & Melo, 2019 have been described using a combination of morphology and molecular data (Nascimento et al ., 2013; Willkens et al ., 2019).…”

Helmintos Asociados Con 15 Especies De Anuros De La Meseta De Ibiapaba, en El Noreste De Brasil

“…In South America, Oligacanthorhynchus sp. was recorded infecting Odontophrynus americanus (Duméril & Bibron, 1841) in Paraguay (Campião et al, 2014) Currently, the genus Rhabdias is composed of 84 species (Kuzmin & Tkach, 2018), being 18 reported in Neotropical anurans (Kuzmin et al, 2016;Willkens et al, 2020). Müller et al (2018) assessing the molecular diversity of Rhabdias in Brazil, reports the occurrence of cryptic species and three Amazonian strains infecting anurans in the northeast region: Rhabdias breviensis Nascimento et al 2013 in R. granulosa from Piauí state, Rhabdias pseudosphaerocephala Kuzmin, Tkach & Brooks, 2007 in Rhinella jimi from Piauí and Ceará states, and R. cf.…”