Revalidation of the Argentinian pouched lamprey <i>Geotria macrostoma</i> (Burmeister, 1868) with molecular and morphological evidence
Background: The Argentinian pouched lamprey, classified as <i>Petromyzon macrostomus</i> Burmeister, 1868 was first described in 1867 in De La Plata River, in Buenos Aires, Argentina, and subsequently recorded in several rivers from Patagonia. Since its original description, the validity...
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| Autores principales: | , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2020
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/107795 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7259705&blobtype=pdf https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0233792 |
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I19-R120-10915-107795 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Naturales lampreys haplotypes Chile Argentina Cloaca phylogenetic analysis rivers fresh water |
| spellingShingle |
Ciencias Naturales lampreys haplotypes Chile Argentina Cloaca phylogenetic analysis rivers fresh water Riva Rossi, Carla Barrasso, Diego Andrés Baker, Cindy Quiroga, Analía Pamela Baigún, Claudio Rafael Mariano Basso, Néstor Guillermo Revalidation of the Argentinian pouched lamprey <i>Geotria macrostoma</i> (Burmeister, 1868) with molecular and morphological evidence |
| topic_facet |
Ciencias Naturales lampreys haplotypes Chile Argentina Cloaca phylogenetic analysis rivers fresh water |
| description |
Background: The Argentinian pouched lamprey, classified as <i>Petromyzon macrostomus</i> Burmeister, 1868 was first described in 1867 in De La Plata River, in Buenos Aires, Argentina, and subsequently recorded in several rivers from Patagonia. Since its original description, the validity of <i>P. macrostomus</i> was questioned by several ichthyologists and 36 years after its original discovery it was considered a junior synonym of <i>Geotria australis</i> Gray, 1851. For a long time, the taxonomic status of <i>G. australis</i> has been uncertain, largely due to the misinterpretations of the morphological alterations that occur during sexual maturation, including the arrangement of teeth, size and position of fins and cloaca, and the development of an exceptionally large gular pouch in males. In this study, the taxonomic status of <i>Geotria</i> from across the “species” range was evaluated using both molecular analysis and examination of morphological characteristics.
Methodology/principal findings: Phylogenetic and species delimitation analyses based on mitochondrial DNA sequences of Cytochrome b (Cyt b) and Cytochrome C Oxidase Subunit 1 (COI) genes, along with morphological analysis of diagnostic characters reported in the original descriptions of the species were used to assess genetic and morphological variation within <i>Geotria</i> and to determine the specific status of the Argentinian lamprey. These analyses revealed that <i>Geotria</i> from Argentina constitutes a well differentiated lineage from Chilean and Australasian populations. The position of the cloaca and the distance between the second dorsal and caudal fins in sub-adult individuals, and at previous life stages, can be used to distinguish between the two species. In addition, the genetic distance between <i>G. macrostoma</i> and <i>G. australis</i> for the COI and Cyt b mitochondrial genes is higher than both intra- and inter-specific distances reported for other Petromyzontiformes.
Conclusions/significance: Our results indicate that the Argentinian pouched lamprey, found along a broad latitudinal gradient on the south-west Atlantic coast of South America, should be named as <i>Geotria macrostoma</i> (Burmeister, 1868) and not as <i>G. australis</i> Gray 1851, returning to its earliest valid designation in Argentina. <i>Geotria macrostoma</i> can now be considered as the single lamprey species inhabiting Argentinian Patagonia, with distinct local adaptations and evolutionary potential. It is essential that this distinctiveness is recognized in order to guide future conservation and management actions against imminent threats posed by human actions in the major basins of Patagonia. |
| format |
Articulo Articulo |
| author |
Riva Rossi, Carla Barrasso, Diego Andrés Baker, Cindy Quiroga, Analía Pamela Baigún, Claudio Rafael Mariano Basso, Néstor Guillermo |
| author_facet |
Riva Rossi, Carla Barrasso, Diego Andrés Baker, Cindy Quiroga, Analía Pamela Baigún, Claudio Rafael Mariano Basso, Néstor Guillermo |
| author_sort |
Riva Rossi, Carla |
| title |
Revalidation of the Argentinian pouched lamprey <i>Geotria macrostoma</i> (Burmeister, 1868) with molecular and morphological evidence |
| title_short |
Revalidation of the Argentinian pouched lamprey <i>Geotria macrostoma</i> (Burmeister, 1868) with molecular and morphological evidence |
| title_full |
Revalidation of the Argentinian pouched lamprey <i>Geotria macrostoma</i> (Burmeister, 1868) with molecular and morphological evidence |
| title_fullStr |
Revalidation of the Argentinian pouched lamprey <i>Geotria macrostoma</i> (Burmeister, 1868) with molecular and morphological evidence |
| title_full_unstemmed |
Revalidation of the Argentinian pouched lamprey <i>Geotria macrostoma</i> (Burmeister, 1868) with molecular and morphological evidence |
| title_sort |
revalidation of the argentinian pouched lamprey <i>geotria macrostoma</i> (burmeister, 1868) with molecular and morphological evidence |
| publishDate |
2020 |
| url |
http://sedici.unlp.edu.ar/handle/10915/107795 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7259705&blobtype=pdf https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0233792 |
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Repositorios |
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