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A new species of lungworm from the Atlantic Forest: Rhabdias megacephala n. sp. parasite of the endemic anuran Proceratophrys boiei

Published online by Cambridge University Press:  18 September 2024

R. Euclydes Open the ORCID record for R. Euclydes [Opens in a new window] ,
F.T. de Vasconcelos Melo ,
H.C. da Justa Open the ORCID record for H.C. da Justa [Opens in a new window] ,
R.F. Jesus Open the ORCID record for R.F. Jesus [Opens in a new window] ,
L.H. Gremski Open the ORCID record for L.H. Gremski [Opens in a new window] ,
S.S. Veiga Open the ORCID record for S.S. Veiga [Opens in a new window]  and
K.M. Campião Open the ORCID record for K.M. Campião [Opens in a new window]
R. Euclydes*
Affiliation:
Biological Interactions, Faculty of Biological Sciences, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil
F.T. de Vasconcelos Melo
Affiliation:
Laboratory of Cell Biology and Helminthology ‘Prof. Dr. Reinalda Marisa Lanfredi’, Institute of Biological Sciences, Federal University of Pará, Belém, Pará 66075-110, Brazil
H.C. da Justa
Affiliation:
Department of Cell Biology, Federal University of Paraná (UFPR), Curitiba, Paraná 81531-980, Brazil
R.F. Jesus
Affiliation:
Laboratory of Cell Biology and Helminthology ‘Prof. Dr. Reinalda Marisa Lanfredi’, Institute of Biological Sciences, Federal University of Pará, Belém, Pará 66075-110, Brazil
L.H. Gremski
Affiliation:
Department of Cell Biology, Federal University of Paraná (UFPR), Curitiba, Paraná 81531-980, Brazil
S.S. Veiga
Affiliation:
UFPR: Universidade Federal do Parana
K.M. Campião
Affiliation:
Biological Interactions, Faculty of Biological Sciences, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil
*
Corresponding author: R. Euclydes; Email: rafael.euclydes@gmail.com
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Abstract

Rhabdias are lung-dwelling parasites of anurans and some reptiles. Currently, 93 species are known to exist worldwide. The identification of Rhabdias species is based mainly on morphological traits of hermaphroditic females that generally have a very conserved morphology. However, different approaches, such as the combination of morphological, molecular, and ecological data, have provided advances in identifying and delimiting rhabdiasid species. Here, we describe a new species of Rhabdias from the south of Brazil, with morphological and molecular data. The new species is distinguished from its congeners by having an elongated body, evident cephalic dilation, larger buccal capsule, and large esophagus. In addition to morphological characteristics, we observed significant genetic divergence among the cytochrome oxidase subunit I (COI) sequence of the new species and the closest available sequence, Rhabdias fuelleborni (10.24%–10.87%). Furthermore, phylogenetic reconstructions based on the COI gene indicated that the new species represents a different lineage, constituting an outgroup of the species complexes Rhabdias cf. stenocephala and Rhabdias fuelleborni with Rhabdias sp. 4. Thus, Rhabdias megacephala is the 24th nominal species of the Neotropical region, the 14th Brazilian, and the fourth species described from south of Brazil.

Keywords

Species diversitytaxonomymolecularparasitismAtlantic Forest

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Type
Research Paper
Information
Journal of Helminthology , Volume 98 , 2024 , e51
Copyright
© The Author(s), 2024. Published by Cambridge University Press

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