Results 31 to 40 of about 229 (134)

DNA barcoding uncovers two putative new species in Trachelyopterus (Siluriformes: Auchenipteridae)

open access: yesJournal of Fish Biology, EarlyView.
Abstract Trachelyopterus is a cryptic genus within the Neotropical catfish family Auchenipteridae with a complex history of taxonomic revisions. Despite the notable morphological and genetic similarities among its species, some studies suggest that the genus harbours greater diversity than is currently recognized, including additional species yet to be
Fiorindo José Cerqueira   +9 more
wiley   +1 more source

A new sexually dimorphic species of the armoured catfish genus Neoplecostomus (Siluriformes: Loricariidae) from Neotropical Atlantic coastal drainages

open access: yesJournal of Fish Biology, EarlyView.
Abstract A new species of the small‐sized armoured catfish genus Neoplecostomus is described from Neotropical Atlantic coastal drainages, in southeast Brazil. The new species can be readily diagnosed from all congeners by having the first plates of the ventral series reduced in size, rounded and ventrally displaced, resulting in a naked band between ...
Pedro L. C. Uzeda   +5 more
wiley   +1 more source

Past, present and future of ichthyology in Argentina [PDF]

open access: yes, 2007
En este documento se publica la conferencia inaugural del II Simposio de Ictiología: La Perspectiva Neotropical (II SIA), dictada por el Dr. Roberto Carlos Menni el día 23 de octubre de 2006 en el auditorio del Museo de La Plata.ProBiota: Programa para ...
Menni, Roberto C.
core  

Cryptic diversity and recent diversification in the Pyrrhulina australis species complex (Characiformes, Lebiasinidae) revealed by mitochondrial DNA

open access: yesJournal of Fish Biology, EarlyView.
Abstract Pyrrhulina australis Eigenmann & Kennedy, 1903, is widely distributed across the main hydrographic basins of South America. The taxonomic integrity of this species is nevertheless challenged by the lack of clear diagnostic characters, its marked geographic variation and the morphological overlap with its congeners. In this context, the present
Taina Barbosa De Souza   +6 more
wiley   +1 more source

XIX. Peces de la cuenca del río Magdalena, Colombia: diversidad, conservación y uso sostenible [PDF]

open access: yes, 2020
Sin duda alguna, una de las regiones naturales mejor estudiadas de Colombia es la cuenca del gran río de La Magdalena. Toda su red de drenaje recorre la historia del país, sus culturas, costumbres, idiosincrasia y sobre todo una variedad de recursos ...
Escobar Cardona, Jorge L.   +57 more
core   +1 more source

On the presence of the poorly documented Hypostomus isbrueckeri Reis, Weber & Malabarba, 1990 (Siluriformes: Loricariidae) in Argentina and extension of its distribution range [PDF]

open access: yes, 2022
Hypostomus Lacépède is the most speciose loricariid genus, including about 150 valid species (Fricke et al. 2022). It has a wide distribution in the Neotropical basins, occurring from Central America to the Salado River, South of the La Plata River in ...
Bugeau, Horacio Baltazar   +6 more
core   +2 more sources

Consensus on future research directions in the phylum Rotifera

open access: yesLimnology and Oceanography, Volume 71, Issue 7, July 2026.
Abstract Rotifers play key roles in aquatic ecosystems, yet significant uncertainty remains about their diversity and evolution, and further evidence is needed to determine how reliably their responses to global change and human impacts can inform conservation.
Rafael L. Macêdo   +17 more
wiley   +1 more source

Life‐History and Landscape Context Shaping the Spatial Genetic Structure of the Migratory Amazonian Fish Prochilodus nigricans

open access: yesFreshwater Biology, Volume 71, Issue 6, June 2026.
ABSTRACT The Neotropical migratory fish Prochilodus nigricans plays a critical ecological and socioeconomic role in the Amazon basin. Nevertheless, little is known about its populations and the genetic diversity pattern of the species. In light of this, the current study investigates the spatial genetic structure and diversity of P.
Ueslei Lopes   +5 more
wiley   +1 more source

Basin-scale distribution and haplotype partitioning in different genetic lineages of the Neotropical migratory fish Salminus brasiliensis [PDF]

open access: yes, 2017
Four valid species are currently recognized in the Neotropical migratory genus Salminus: Salminus brasiliensis, Salminus franciscanus, Salminus hilarii and Salminus affinis.
Bugeau, Horacio Baltazar   +31 more
core   +1 more source

Deriva temporal de macroinvertebrados acuáticos en la quebrada Salinas, Sotará-Cauca (Colombia) [PDF]

open access: yes, 2023
Understanding ecological dynamics, such as drift in aquatic ecosystems, is crucial for unraveling migration and colonization processes in lotic environments and comprehending the influence of environmental variables.
Collazos-Tobar, Zaida Lizeth   +1 more
core   +2 more sources

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