Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters
Pseudanisakis argentinensis n. sp. is proposed to accommodate parasitic nematodes found in six skate species (Rajidae and Arhynchobatidae) examined from southern Southwest Atlantic waters. The new species differs from its congeners by the following combination of characters: a cupola on each lip, males with 8–12 pairs of precloacal genital papillae, a larger size for both males and females, a greater length-to-breadth ratio of the ventriculus and the presence of a small knob on the tip of the tail. Allometric growth was observed for several morphometric features; however, the slopes of the allometric relationships across host species exhibited non-significant differences and were considered as a strong evidence for conspecificity. Congruent results were obtained after the genetic characterization of the mitochondrial cytochrome c oxidase subunit 1 gene of worms obtained from different skate species, whose values of genetic divergence (1.3) lay within the range of intraspecific variation. Previous records of specimens referred to as Pseudanisakis tricupola in skates from South American waters are regarded as conspecific with P. argentinensis n. sp.
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2017-07
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Subjects: | Rajiformes, Peces, Parásitos, Nematoda, Fishes, Parasites, Pseudanisakis, Mar Argentino, |
Online Access: | http://hdl.handle.net/20.500.12123/1965 https://link.springer.com/article/10.1007%2Fs00436-017-5482-2 https://doi.org/10.1007/s00436-017-5482-2 |
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oai:localhost:20.500.12123-19652018-06-28T17:44:43Z Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters Irigoitia, Manuel Marcial Braicovich, Paola Elizabeth Farber, Marisa Diana Timi, Juan Tomás Rajiformes Peces Parásitos Nematoda Fishes Parasites Pseudanisakis Mar Argentino Pseudanisakis argentinensis n. sp. is proposed to accommodate parasitic nematodes found in six skate species (Rajidae and Arhynchobatidae) examined from southern Southwest Atlantic waters. The new species differs from its congeners by the following combination of characters: a cupola on each lip, males with 8–12 pairs of precloacal genital papillae, a larger size for both males and females, a greater length-to-breadth ratio of the ventriculus and the presence of a small knob on the tip of the tail. Allometric growth was observed for several morphometric features; however, the slopes of the allometric relationships across host species exhibited non-significant differences and were considered as a strong evidence for conspecificity. Congruent results were obtained after the genetic characterization of the mitochondrial cytochrome c oxidase subunit 1 gene of worms obtained from different skate species, whose values of genetic divergence (1.3) lay within the range of intraspecific variation. Previous records of specimens referred to as Pseudanisakis tricupola in skates from South American waters are regarded as conspecific with P. argentinensis n. sp. Instituto de Biotecnología Fil: Irigoitia, Manuel Marcial. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Laboratorio de Ictioparasitología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Braicovich, Paola Elizabeth. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Laboratorio de Ictioparasitología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Farber, Marisa Diana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina Fil: Timi, Juan Tomás. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Laboratorio de Ictioparasitología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras; Argentina 2018-03-05T17:57:44Z 2018-03-05T17:57:44Z 2017-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/1965 https://link.springer.com/article/10.1007%2Fs00436-017-5482-2 0932-0113 (Print) 1432-1955 (Online) https://doi.org/10.1007/s00436-017-5482-2 eng info:eu-repo/semantics/restrictedAccess application/pdf Parasitology research 116 (7) : 1989–1999. (July 2017) |
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Rajiformes Peces Parásitos Nematoda Fishes Parasites Pseudanisakis Mar Argentino Rajiformes Peces Parásitos Nematoda Fishes Parasites Pseudanisakis Mar Argentino |
spellingShingle |
Rajiformes Peces Parásitos Nematoda Fishes Parasites Pseudanisakis Mar Argentino Rajiformes Peces Parásitos Nematoda Fishes Parasites Pseudanisakis Mar Argentino Irigoitia, Manuel Marcial Braicovich, Paola Elizabeth Farber, Marisa Diana Timi, Juan Tomás Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters |
description |
Pseudanisakis argentinensis n. sp. is proposed to accommodate parasitic nematodes found in six skate species (Rajidae and Arhynchobatidae) examined from southern Southwest Atlantic waters. The new species differs from its congeners by the following combination of characters: a cupola on each lip, males with 8–12 pairs of precloacal genital papillae, a larger size for both males and females, a greater length-to-breadth ratio of the ventriculus and the presence of a small knob on the tip of the tail. Allometric growth was observed for several morphometric features; however, the slopes of the allometric relationships across host species exhibited non-significant differences and were considered as a strong evidence for conspecificity. Congruent results were obtained after the genetic characterization of the mitochondrial cytochrome c oxidase subunit 1 gene of worms obtained from different skate species, whose values of genetic divergence (1.3) lay within the range of intraspecific variation. Previous records of specimens referred to as Pseudanisakis tricupola in skates from South American waters are regarded as conspecific with P. argentinensis n. sp. |
format |
info:ar-repo/semantics/artículo |
topic_facet |
Rajiformes Peces Parásitos Nematoda Fishes Parasites Pseudanisakis Mar Argentino |
author |
Irigoitia, Manuel Marcial Braicovich, Paola Elizabeth Farber, Marisa Diana Timi, Juan Tomás |
author_facet |
Irigoitia, Manuel Marcial Braicovich, Paola Elizabeth Farber, Marisa Diana Timi, Juan Tomás |
author_sort |
Irigoitia, Manuel Marcial |
title |
Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters |
title_short |
Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters |
title_full |
Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters |
title_fullStr |
Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters |
title_full_unstemmed |
Morphological and molecular evidence for a new species of Pseudanisakis Layman & Borovkova, 1926 (Nematoda: Ascaridida), parasitizing Rajiformes in southern Southwest Atlantic waters |
title_sort |
morphological and molecular evidence for a new species of pseudanisakis layman & borovkova, 1926 (nematoda: ascaridida), parasitizing rajiformes in southern southwest atlantic waters |
publishDate |
2017-07 |
url |
http://hdl.handle.net/20.500.12123/1965 https://link.springer.com/article/10.1007%2Fs00436-017-5482-2 https://doi.org/10.1007/s00436-017-5482-2 |
work_keys_str_mv |
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1756007068425256961 |