A new species of Diapoma (Characiformes, Characidae, Stevardiinae) from the Rio Paraná basin, with an identification key to the species of the genus
| Autor: | Luiz Roberto Malabarba, James Anyelo Vanegas-Ríos, María de las Mercedes Azpelicueta |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
STEVARDIINAE Male SEXUAL DIMORPHISM 010607 zoology Argentina Identification key Aquatic Science Biology Characiformes 010603 evolutionary biology 01 natural sciences Ciencias Biológicas PIRAY-MINI STREAM Rivers Species Specificity Genus Diapoma NEOTROPICAL FRESHWATER FISH Animals Endemism Ecology Evolution Behavior and Systematics Mouth Characidae ENDEMIC SPECIES Anatomy Zoología Ornitología Entomología Etología biology.organism_classification Sexual dimorphism Fish anatomy Female CIENCIAS NATURALES Y EXACTAS Brazil Conservación de la Biodiversidad |
| Zdroj: | Journal of fish biology. 93(5) |
| ISSN: | 1095-8649 |
| Popis: | Diapoma nandi is described from the Piray-Miní stream, a tributary of the Rio Paraná in Argentina. It is characterized among the Stevardiinae by having a terminal mouth, two unbranched and eight branched dorsal-fin rays, one unbranched and six branched pelvic-fin rays and the absence of a caudal-fin organ and is distinguished from all congeners by the following combination of characters: unmodified scales on the lower caudal-fin lobe, lack of enlarged opercle and subopercle, incomplete lateral line, hyaline adipose fin, anal-fin distal border straight or slightly convex in adult males, large tricuspid teeth on anterior region of the dentary, distal arrangements of the anal-fin bony hooks in adult males, middle caudal-fin rays lacking large round blotch and several morphometric variables associated with body shape. Additionally, we conducted a morphometric comparison focused on the congeners that co-occur in the Paraná basin. Fil: Vanegas Rios, James Anyelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina Fil: Azpelicueta, Maria de Las M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología de Vertebrados; Argentina Fil: Malabarba, Luiz R.. Universidade Federal do Rio Grande do Sul; Brasil |
| Databáze: | OpenAIRE |
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