Anatomy and phylogenetic relationships of a new catfish species from northeastern Argentina with comments on the phylogenetic relationships of the genus Rhamdella Eigenmann and Eigenmann 1888 (Siluriformes, Heptapteridae)
Rhamdella cainguae, a new species of the family Heptapteridae is described from the Arroyo Cuña-Pirú, a tributary of the Río Paraná, in the subtropical forest of Misiones, northeastern Argentina. The presence of a large differentiated ovoid area on the supraorbital laterosensory canal along the fron...
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Formato: | Articulo |
Lenguaje: | Inglés |
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2008
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/88568 |
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I19-R120-10915-88568 |
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institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
collection |
SEDICI (UNLP) |
language |
Inglés |
topic |
Ciencias Naturales Biogeography South America Taxonomy Teleostei |
spellingShingle |
Ciencias Naturales Biogeography South America Taxonomy Teleostei Bockmann, Flavio A. Miquelarena, Amalia María Anatomy and phylogenetic relationships of a new catfish species from northeastern Argentina with comments on the phylogenetic relationships of the genus Rhamdella Eigenmann and Eigenmann 1888 (Siluriformes, Heptapteridae) |
topic_facet |
Ciencias Naturales Biogeography South America Taxonomy Teleostei |
description |
Rhamdella cainguae, a new species of the family Heptapteridae is described from the Arroyo Cuña-Pirú, a tributary of the Río Paraná, in the subtropical forest of Misiones, northeastern Argentina. The presence of a large differentiated ovoid area on the supraorbital laterosensory canal along the frontal-sphenotic boundary, delimited by the slender dorsal walls of the bones, and with no foramen for a laterosensory branch, is an autapomorphy for R. cainguae. A detailed description of the skeleton and laterosensory system of R. cainguae is provided. The genus Rhamdella is rediagnosed on the basis of three autapomorphies: a very large opening in the frontal for the exit of the s6 (epiphyseal) branch of the supraorbital laterosensory canal (reversed in R. rusbyi), a large optic foramen, and a dark stripe along the lateral surface of the body (reversed in R. rusbyi). Rhamdella is considered to be the sister group of a large heptapterid clade composed of the Nemuroglanis sub-clade plus the genera Brachyglanis, Gladioglanis, Leptorhamdia, and Myoglanis. Rhamdella is herein restricted to five valid species: R. aymarae, R. cainguae, R. eriarcha, R. longiuscula, and R. rusbyi. A sister group relationship between R. aymarae and R. rusbyi is supported by three synapomorphies. Rhamdella cainguae shares 12 apomorphic features with R. eriarcha and R. longiuscula. |
format |
Articulo Articulo |
author |
Bockmann, Flavio A. Miquelarena, Amalia María |
author_facet |
Bockmann, Flavio A. Miquelarena, Amalia María |
author_sort |
Bockmann, Flavio A. |
title |
Anatomy and phylogenetic relationships of a new catfish species from
northeastern Argentina with comments on the phylogenetic relationships of the
genus Rhamdella Eigenmann and Eigenmann 1888 (Siluriformes, Heptapteridae) |
title_short |
Anatomy and phylogenetic relationships of a new catfish species from
northeastern Argentina with comments on the phylogenetic relationships of the
genus Rhamdella Eigenmann and Eigenmann 1888 (Siluriformes, Heptapteridae) |
title_full |
Anatomy and phylogenetic relationships of a new catfish species from
northeastern Argentina with comments on the phylogenetic relationships of the
genus Rhamdella Eigenmann and Eigenmann 1888 (Siluriformes, Heptapteridae) |
title_fullStr |
Anatomy and phylogenetic relationships of a new catfish species from
northeastern Argentina with comments on the phylogenetic relationships of the
genus Rhamdella Eigenmann and Eigenmann 1888 (Siluriformes, Heptapteridae) |
title_full_unstemmed |
Anatomy and phylogenetic relationships of a new catfish species from
northeastern Argentina with comments on the phylogenetic relationships of the
genus Rhamdella Eigenmann and Eigenmann 1888 (Siluriformes, Heptapteridae) |
title_sort |
anatomy and phylogenetic relationships of a new catfish species from
northeastern argentina with comments on the phylogenetic relationships of the
genus rhamdella eigenmann and eigenmann 1888 (siluriformes, heptapteridae) |
publishDate |
2008 |
url |
http://sedici.unlp.edu.ar/handle/10915/88568 |
work_keys_str_mv |
AT bockmannflavioa anatomyandphylogeneticrelationshipsofanewcatfishspeciesfromnortheasternargentinawithcommentsonthephylogeneticrelationshipsofthegenusrhamdellaeigenmannandeigenmann1888siluriformesheptapteridae AT miquelarenaamaliamaria anatomyandphylogeneticrelationshipsofanewcatfishspeciesfromnortheasternargentinawithcommentsonthephylogeneticrelationshipsofthegenusrhamdellaeigenmannandeigenmann1888siluriformesheptapteridae |
bdutipo_str |
Repositorios |
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1764820489682812929 |