ArticlePDF Available

Sorubim elongatus, a new species of catfish (Siluriformes: Pimelodidae) from tropical South America syntopic with S. lima

Authors:

Abstract

Sorubim elongatus, new species, is described from the Amazon, Essequibo, and Orinoco basins in northern South America where it is sympatric and syntopic with the more familiar S. lima. This medium-sized (to 300 mm SL) pimelodid shares several morphological similarities with congeners that have helped to obscure its formal taxonomic recognition and description despite being common in museum collections in Europe and the Western Hemisphere.The new species is easily recognized by an elongate head and body and a combination of the following characters: modally 8 pectoral-fin rays, 22 anal-fin rays, and 19 gill rakers on the 1st pharyngeal arch; anal-fin origin; and mental barbels inserted even with or posterior to the gular apex. The nominal S. latirostris Miranda-Ribeiro is a junior subjective synonym of S. lima (Bloch & Schneider).
A preview of the PDF is not available
... Mojica et al . 2005 Pseudoplatystoma trigrinum ( Valenciennes , 1840 ) ama pu ICNMHN Castro 1986a , 1987a y 1994 ; Castro cq aps & Arboleda 1988 ; Santamaria 1995 ; Mojica 1999 ; Agudelo et al . 2000 ; Santos 2000 ; Vejarano 2000 ; Correa 2003 ; Mojica et al . 2005 Sorubim elongatus Littmann , Burr , Schmidt & Isern , 2001 ama pu IAvHP , ICNMHN , Littmann et al . 2001 , Mojica et al . 2005 cq aps MCZ Sorubim lima ( Bloch & Schneider , 1801 ) ama pu FMNH , IAvHP , Castro 1986a , 1987a y 1994 ; Castro ICNMHN , UF & Arboleda 1988 ; Santamaria 1995 ; Contreras 1999 ; Mojica 1999 ; Agudelo et al . 2000 ; Prieto 2000 ; Santos 2000 ; Vejarano 2000 ; Calderón & Hincapié 2001 ; Correa 2003 ; Rodriguez & van d ...
Article
Full-text available
The aim of the present contribution is to describe a partial fossil skull belonging to the catfish genus Sorubim. The specimen originates from the Late Miocene Ituzaingó Formation, at Paraná locality, Entre Ríos Province, Argentina. The material described here (MACN Pv-14224) was determined just to genus because the living species of Sorubim are morphologically similar. Presence of Sorubim is in concordance with the hypothesis indicating that most extant pimelodid genera were already present by the Late Miocene. Present finding constitutes the first fossil record for the genus.
Article
Full-text available
The present work is part of a process to create a Catalogue of the Freshwater Fishes of Colombia and consisted in the depuration and updating of the taxonomic and geographic components of the checklist of the freshwater fishes of Colombia. An exhaustive revision of the 1435 species recorded in 2008 was necessary to: 1. Add new species described since 2009 and species originally described from Colombia but inadvertently omitted in 2008; 2. Add new records of already described species; 3. Delete species whose presence in Colombia was not supported by voucher specimens in ichthyological collections; and 4. Revise the geographic distribution of the species listed in 2008. This process resulted in the following numbers: 1. Total number of freshwater fish species in Colombia: 1494; 2. Number of species recorded by hydrographic region - Amazon: 706, Orinoco: 663, Caribbean: 223, Magdalena-Cauca: 220, Pacific: 130; and 3. Number of endemic species: 374 (76% from the trans-Andean region). Updating the current checklist is a fundamental requirement to ensure its incorporation in the decision-making process with regard to the conservation of Colombian aquatic species and ecosystems, which are facing transformation processes as a result of activities such as mining, construction of hydroelectric plants, expansion of the agricultural frontier and subsequent deforestation, industrial and domestic pollution, development of waterways, introduction of exotic species, and climate change.
Book
Full-text available
Se describen cerca de 350 especies de peces, en parte con diseños de características morfológicas importantes para su determinación. Al final del libro se presentan fotos en color de las especies descritas. De especial interés son los primeros capítulos del libro, un capítulo extenso resume el conocimiento sobre el desarrollo geológico la biogeografía de la región, desde la separación entre América del Sur y África durante el Cretáceo Superior. Los capítulos sobre el clima actual, hidrología e hidroquímica de los diferentes cuerpos de agua forman una bases sólida para la caracterización de diferentes hábitat de peces.
Article
Full-text available
We present a corrected, expanded and updated list of the continental fishes of Venezuela. We develop a matrix presenting three types of information: taxon, ecological habits as a function of salinity, and distribution in the seven principal hydrological basins (Orinoco, Cuyuní, Río Negro, Gulf of Paria, Caribbean, Lake Valencia and Maracaibo). From the most recent list of the Venezuelan fish species, 137 species were removed while 270 new species were added. The continental ichthyological species list for Venezuela now comprises 1198 species in 22 orders, 82 families and 471 genera. The best-represented orders are the Characiformes (450 spp.), Siluriformes (395 spp.), Perciformes (160 spp.) and the Gymnotiformes (65 spp.). The River Orinoco is the richest basin (939 spp.), followed by Río Negro (283 spp.), Caribbean (194 spp.), Cuyuní (186 spp.), Maracaibo (177 spp.), Gulf of Paria (158 spp.) and Lake Valencia (32 spp.). Strong positive correlations are observed between a) the surface area of each basin and the total species richness per basin, and b) the number of strictly freshwater species per basin and the number of unique species per basin. Approximately 85% of the species are exclusively fresh water and 15% were euryhaline.
Article
Full-text available
We present a corrected, expanded and updated list of the continental fishes of Venezuela. We develop a matrix presenting three types of information: taxon, ecological habits as a function of salinity, and distribution in the seven principal hydrological basins (Orinoco, Cuyuní, Río Negro, Gulf of Paria, Caribbean, Lake Valencia and Maracaibo). From the most recent list of the Venezuelan fish species, 137 species were removed while 270 new species were added. The continental ichthyological species list for Venezuela now comprises 1198 species in 22 orders, 82 families and 471 genera. The best-represented orders are the Characiformes (450 spp.), Siluriformes (395 spp.), Perciformes (160 spp.) and the Gymnotiformes (65 spp.). The River Orinoco is the richest basin (939 spp.), followed by Río Negro (283 spp.), Caribbean (194 spp.), Cuyuní (186 spp.), Maracaibo (177 spp.), Gulf of Paria (158 spp.) and Lake Valencia (32 spp.). Strong positive correlations are observed between a) the surface area of each basin and the total species richness per basin, and b) the number of strictly freshwater species per basin and the number of unique species per basin. Approximately 85% of the species are exclusively fresh water and 15% were euryhaline.
ResearchGate has not been able to resolve any references for this publication.