Shallow water Asteroidea and Ophiuroidea of Uruguay: composition and biogeography
Asteroidea (five species) and Ophiuroidea (18 species) recorded along the Uruguayan littoral (up to 50 m depth) are summarized and their distributional pattern are discussed. Species are gathered into four groups: 1) A. taxa distributed from North/South Carolina, or from the Caribbean Sea, to Southe...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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Universidad de Costa Rica
2008
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| Online Access: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/27084 https://doi.org/10.15517/rbt.v56i3.27084 |
| Summary: | Asteroidea (five species) and Ophiuroidea (18 species) recorded along the Uruguayan littoral (up to 50 m depth) are summarized and their distributional pattern are discussed. Species are gathered into four groups: 1) A. taxa distributed from North/South Carolina, or from the Caribbean Sea, to Southern Buenos Aires Province (Argentina), B. species ranging from North/South Carolina, Florida, São Paulo, to the mouth of Rio de la Plata, 2) species ranging from Rio de Janeiro south to the San Matias Gulf, 3) taxa recorded from Chile or from Antarctic/Subantarctic waters north to Uruguay, 4) a single cosmopolitan species. While ophiuroids are represented in each one of the mentioned groups, asteroids are restricted to the first one. As it happens with other elements of the Uruguayan fauna, this complex pattern is a consequence of the confluence of the warm Brazilian and the cold Malvinas (Falkland) currents, and of the discharge of fresh, muddy waters of the Rio de la Plata. Rev. Biol. Trop. 56 (Suppl. 3): 205-214. Epub 2009 January 05. Se brinda una lista de los Asteroidea (5 especies) y Ophiuroidea (18 especies) de aguas someras (hasta 50 m) de Uruguay, y se discute su distribución, agrupándose las especies de acuerdo a su ámbito latitudinal en: 1) A. aquellas distribuidas desde Carolina del Norte o Sur o el mar Caribe hasta el sur de la Provincia de Buenos Aires (Argentina), 1) B. especies que se encuentran al norte de Uruguay pero que no pasan del Rio de la Plata hacia el sur, 2) las distribuidas desde Río de Janeiro hasta aproximadamente el Golfo San Matías, 3) desde Chile o aguas antárticas o subantárticas hasta Uruguay o sur de Brasil, y 4) cosmopolita. Todos los asteroideos pertenecen exclusivamente al primer grupo, distribuyéndose los ofiuroideos en los cinco. Como sucede con otros elementos de la fauna uruguaya, este patrón complejo es consecuencia de una situación oceanográfica compleja, producida fundamentalmente por la confluencia de la corriente cálida de Brasil y la fría de Malvinas (Falkland), y la ... |
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