Adriana Almirón

Adriana Almirón
Universidad Nacional de La Plata | UNLP · División de Zoología de Vertebrados

Dra

About

91
Publications
41,756
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,102
Citations
Citations since 2016
30 Research Items
578 Citations
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120

Publications

Publications (91)
Article
Explosive bouts of diversification are one of the most conspicuous features of the tree of life. When such bursts are repeated in similar environments it suggests some degree of predictability in the evolutionary process. We assess parallel adaptive radiation of South American pike cichlids (Crenicichla) using phylogenomics and phylogenetic compara...
Article
Full-text available
In this study, we present a new method to compare the distribution of knowledge regarding the biodiversity of a taxa with the distribution of environments inhabited by that taxa, in order to identify the main geographical gaps in biodiversity knowledge. We compared the geographical distribution of studies describing freshwater fish assemblages in A...
Article
The Crenicichla mandelburgeri species complex from the Middle Paraná shows parallel evolution of ecomorphs to the unrelated Crenicichla missioneira species complex from the Uruguay River. In this article, we describe a new species pair (C. sp. Piray Guazú and C. sp. Piray Guazú Line) from the C. mandelburgeri species complex that has evolved a para...
Article
Full-text available
Crenicichla is the largest and most widely distributed genus of Neotropical cichlids. Here, we analyze a mtDNA dataset comprising 681 specimens (including Teleocichla, a putative ingroup of Crenicichla) and 77 out of 105 presently recognized valid species (plus 10 out of 36 nominal synonyms plus over 50 putatively new species) from 129 locations in...
Article
During a parasitological survey of fishes at Iguazu National Park, Argentina, specimens belonging to the allocreadiid genus Auriculostoma were collected from the intestine of Characidium heirmostigmata. The erection of the new species is based on a unique combination of morphological traits as well as on phylogenetic analysis. Auriculostoma guacura...
Article
Full-text available
The drainage of the Negro River is the most important watercourse in the Patagonia ecoregion and, together with the Colorado river basin, define an ecotone, i.e., a zoogeographic transition, where coexist the Brazilian and Patagonian lineages of freshwater fishes. The Patagonia ecoregion has 29 fish species, 15 native and the remaining introduced....
Article
Full-text available
Actualmente la biodiversidad íctica conocida del Parque Nacional Iguazú comprende 104 especies, de las cuales dos corresponden a especies de “dientudos” del género Oligosarcus: O. longirostris y O. menezesi. En esta contribución se da a conocer una tercera especie de este género registrada dentro de dicho parque: Oligosarcus pintoi. Este nuevo hall...
Article
Full-text available
We address the diversity of two species groups of the cichlid genus Gymnogeophagus in the Middle Paraná basin using molecular phylogeography and traditional morphological characters and conclude that they are composed of a higher diversity of endemic species than previously thought. The nominal Gymnogeophagus setequedas is found non-monophyletic wi...
Article
Full-text available
The Crenicichla mandelburgeri species complex from the Middle Paraná basin is a diverse group of cichlid species and contains all known ecomorphs found within the entire genus Crenicichla. Here, we study the phylogenetic relationships within the C. mandelburgeri species complex using ddRAD sequencing with focus on its two candidate species flocks e...
Article
Full-text available
The Crenicichla mandelburgeri species complex from the Middle Parana´ shows parallel evolution of ecomorphs to the unrelated C. missioneira species complex from the Uruguay River. In this article, we describe a new species from the C. mandelburgeri species complex that has evolved a parallel morphology and ecology to an unrelated species from the C...
Article
Full-text available
Gymnogeophagus jaryi, new species, is described from Southern tributaries of the Middle Paraná basin in Misiones. It can be distinguished from all other members of the genus, except from G. australis and G. caaguazuensis, by the presence of a hyaline to grey anterior portion of the dorsal fin. Gymnogeophagus jaryi differs from G. caaguazuensis by a...
Data
Character matrix used for the phylogenetic analysis. (TNT)
Data
Phylogenetic relationships and molecular species delimitation from BEAST analysis. (PDF)
Article
Full-text available
Parallel adaptive radiations have arisen following the colonization of islands by lizards and lakes by fishes. In these classic examples, parallel adaptive radiation is a response to the ecological opportunities afforded by the colonization of novel ecosystems and similar adaptive landscapes that favour the evolution of similar suites of ecomorphs,...
Article
Full-text available
The Gymnogeophagus setequedas group is based on our results composed of three endemic species of which one, G. taroba sp. n., is described as a new species. The three species are diagnosable from each other and from other species of Gymnogeophagus by stable differences in several morphological characters among which the best are found in coloration...
Article
Full-text available
Four valid species are currently recognized in the Neotropical migratory genus Salminus: Salminus brasiliensis, Salminus franciscanus, Salminus hilarii and Salminus affinis. However, molecular evidence strongly suggested that two different species might be contained under the taxonomic denomination Salminus brasiliensis. Therefore, the geographical...
Article
Full-text available
Gymnogeophagus constellatus is registered for the first time from the freshwaters of Argentina, the río Uruguay basin in the province of Misiones. The species was originally described from the río Ijuí and its tributaries in Brazil.
Article
Full-text available
Gymnogeophagus lipokarenos is registered for the first time from Argentina in the Province of Misiones. The species was originally described as endemic to the Upper Uruguay freshwater ecoregion in Brazil. Our findings extend its distribution into the Lower Uruguay ecoregion throughout the province of Misiones.
Article
Full-text available
Crenicichla yaha was described from the Urugua-í river (arroyo Urugua-í; and erroneously on one specimen from the Rio Iguazú) in Misiones, Argentina. The species was only known from nine specimens collected in 1986 during an environmental impact study prior to the construction of the Urugua-í hydroelectric dam in 1989. The species has not been coll...
Article
Full-text available
Abstract. The aim of this study is to survey the fish fauna of the Iguazu National Park and designate those vulnerable species with special value (EVVES). As a result of this project 104 species were recorded, of which 28 are endemic to the basin and 13 represent new records for Argentina. Finally, 87 species of PNI with special value representing...
Article
Full-text available
p>El objetivo de este trabajo fue evaluar la diversidad de la ictiofauna en el valle aluvial del río Paraná, entre las localidades de Ituzaingó y Puerto Abra, zona de influencia de la represa de Yacyretá (Argentina). Los datos incluyen el período 2004-2015. Las campañas se realizaron cada tres meses (cuatro por año), abarcando así todas las estacio...
Article
Full-text available
Astyanax xiru is registered for the first time from freshwaters of Argentina in the province of Misiones. This species was found in the Middle río Uruguay basin: arroyo Yaboti-Mini and its affluent arroyo San Juan; arroyos Fortaleza, Oveja Negra and Trigueño, tributaries of the arroyo Yaboti-Guazú; and río Pepirí-Guazú, the only stream in Argentine...
Article
Full-text available
Astyanax xiru is registered for the first time from freshwaters of Argentina in the province of Misiones. This species was found in the Middle río Uruguay basin: arroyo Yaboti-Mini and its affluent arroyo San Juan; arroyos Fortaleza, Oveja Negra and Trigueño, tributaries of the arroyo Yaboti-Guazú; and río Pepirí-Guazú, the only stream in Argentine...
Article
Full-text available
Diapoma pyrrhopteryx is registered for the first time in freshwaters of Argentina, upper río Uruguay basin, in the province of Misiones. This species was found in arroyo Toro, tributary of the río Pepirí Guazú, the only river of Argentina included in the Upper Uruguay freshwater ecoregion. D. pyrrhopteryx is one of 27 endemic fish species known fro...
Article
Full-text available
The genus Rhamdella is considered to be composed of six species but only R. aymarae and R. cainguae have been recorded from Argentina. Information on the distributions of these species is scarce and R. cainguae is only known from its type locality. This note documents a wider distribution range of R. cainguae and reports R. longiuscula in Argentina...
Article
Full-text available
The Southern Pampean Area includes the southernmost limit of the Brazilian subregion and represents an interesting model to study how evolution of the landscape has affected the distribution of freshwater fishes in time and space. The hydrogeographic pattern of the region results from a combination of factors including climatic and sea level change...
Article
Astyanax xiru is registered for the first time from freshwaters of Argentina in the province of Misiones. This species was found in the Middle río Uruguay basin: arroyo Yaboti-Mini and its affluent arroyo San Juan; arroyos Fortaleza, Oveja Negra and Trigueño, tributaries of the arroyo Yaboti-Guazú; and río Pepirí-Guazú, the only stream in Argentine...
Article
Full-text available
The diversity of the fish fauna in the alluvial valley of the Paraná River, between the cities of Ituzaingó and Puerto Abra, area of influence of the Yacyretá dam, was evaluated. Data used range from 2004 to 2015. Campaigns are conducted every three months (four per year), covering all seasons. Fish were collected using electrofishing equipment. Fo...
Article
Full-text available
Five species of Crenicichla have been recorded so far from the lower Iguazú River. Four of them are endemic (members of the C. mandelburgeri species complex from the C. lacustris group) and living in sympatry; the fifth species (C. lepidota) belongs to an Amazon/Orinoco-centered species group (C. saxatilis) and is only distantly related to the rema...
Article
Full-text available
Freshwater fish are an ideal model to illustrate how climate-tectonic changes affect the distribution of genetic variation. Freshwater bodies are extensively affected by environmental changes, with streams even changing their courses in the most extreme cases. Fortunately, this situation is reflected in the genetic composition of populations and ma...
Article
Full-text available
Characidium heirmostigmata and C. serrano are registered for the first time in freshwaters of Argentina in the province of Misiones. Characidium heirmostigmata was found in the middle río Paraná basin and C. serrano in upper and middle río Uruguay basin.
Article
Full-text available
Oligosarcus amome is described from tributaries of the arroyo Yaboti-Guazu, rio Uruguay basin, Misiones Province, Argentina. This new species can be distinguished from all its congeners by the following combination of characters: presence of two conspicuous series of teeth on premaxilla bearing pentacuspidate teeth in the outer series. Oligosarcus...
Article
Full-text available
Rineloricaria reisi, R. stellata, and R. zaina are registered for the first time in freshwaters of Argentina. These three species were found in the Río Uruguay basin in Misiones Province. As a result of these findings, five species of Rineloricaria are found in the Río Uruguay basin in Argentina. A key of Rineloricaria species from that basin is al...
Article
Full-text available
Brachyhypopomus draco is recorded from the Reserva Natural Provincial del Iberá, province of Corrientes, Province. This finding remarkably expands its distribution in Argentina.
Article
Full-text available
The genus Tatia is recorded for the first time from Argentina in Misiones and Corrientes Provinces. Tatia jaracatia was captured only in the arroyo Deseado, río Iguazú basin, and Tatia neivai has been caught in several streams (tributaries of río Paraná) Piray Guazú, Garuhapé, Tabay, Garupá, and also from the río Paraná in Puerto Nemesio Parma and...
Article
Full-text available
Crenicichla taikyra, new species, is described from the middle río Paraná, Argentina. Crenicichla taikyra is distinguished from the other species of the genus by the following combination of characters: lower pharyngeal tooth plate stout, bearing molariform teeth, ascending arm of premaxilla longer than the dentigerous arm, posterior edge of preope...
Article
Full-text available
The Atlantic drainage basins are located in the southern Pampean area, in the southernmost part of the Brazilian subregion. Tectonic and paleoclimatic phenomena, occurring during the Quaternary, have currently isolated these basins from the present hydrographic system. Their ichthyofaunal composition is similar to that of hydric systems located fur...
Article
Full-text available
Leporinus amae is known from the Rio Apuaê (type locality), Rio Canoas and Rio Caveiras tributaries of the Uruguay River basin, in Brazil. The original description of this species was mainly based on a single specimen lacking intraspecific variation in meristic and morphometric of most characters. We expand the range of distribution and report the...
Article
Full-text available
Four species of the genus Gymnotus are present in Argentina: G. inaequilabiatus, G. omarorum, G. pantanal, and G. sylvius, the last three species being recorded for the first time in freshwater courses. Gymnotus omarorum, G. pantanal, and G. sylvius together with others of the genus Brachyhypopomus are the group of fishes that bear the greatest imp...
Article
Full-text available
Within the Loricariidae, the genus Hypostomus is one of the most diversified freshwater catfish groups. Using new sequence data from the mitochondrial Control Region (D-loop) we examined the phylogeny of this genus. Our phylogenetic analyses suggest that, in the Paraná river basin, species diversity in the genus Hypostomus has been shaped by two pr...
Article
Full-text available
Phenacorhamdia tenebrosa is registered for the first time from the lower Paraná river basin in Argentina. The specimens were caught in the left bank of the Paraná river at Yaciretá Dam, close to Ituzaingó town, and in the arroyo La Azotea, Pre-Delta National Park.
Article
Full-text available
Cyanocharax obi is described from tributaries of the arroyo Paranay–Guazú, río Paraná basin, Misiones province, Argentina. This new species can be distinguished from its congeneres by the following combination of characters: lateral line interrupted or with alternated series of perforated and non perforated scales, 22–24 branched anal-fin rays, bod...
Article
Full-text available
First multilocus analysis of the largest Neotropical cichlid genus Crenicichla combining mitochondrial (cytb, ND2, 16S) and nuclear (S7 intron 1) genes and comprising 602 sequences of 169 specimens yields a robust phylogenetic hypothesis. The best marker in the combined analysis is the ND2 gene which contributes throughout the whole range of hierar...
Article
Full-text available
Two new species of Australoheros ŘÍČan and Kullander are described. Australoheros ykeregua sp. nov. is described from the tributaries of the rÍo Uruguay in Misiones province, Argentina. Australoheros angiru sp. nov. is described from the tributaries of the upper rio Uruguai and middle rio Iguaçu in Brazil. The two new species are not closely relate...
Article
Full-text available
The discovery of Australoheros facetus in two streams of the Atlantic coastal drainage in Southern Buenos Aires province extends the distribution range for this species some 200 km to the south. Since there is no connection between the streams of the Atlantic slope and the La Plata basin this raises a question about the current distribution of the...
Article
Full-text available
A new species of Crenicichla Heckel, C. hu, is described from the arroyo Piray–Miní, a left-hand tributary of the río Paraná, Misiones province, Argentina. This new species is easily distinguished from its congeners in the La Plata basin and adjacent coastal rivers by the dark coloration (dark grey or dark brown to black), a color pattern consistin...
Article
Full-text available
A new species of Crenicichla Heckel, C. hu, is described from the arroyo Piray–Miní, a left-hand tributary of the río Paraná, Misiones province, Argentina. This new species is easily distinguished from its congeners in the La Plata basin and adjacent coastal rivers by the dark coloration (dark grey or dark brown to black), a color pattern consistin...
Article
Full-text available
A new species of Crenicichla, C. ypo, is described from the Arroyo Urugua-í, a left-hand tributary of the middle Paraná River, Misiones province, Argentina. The new species is recognized by 6 to 8 irregular blotches along the upper lateral line, absence of scattered dark spots on flanks, low number (47-55) of E1 scales, and a slightly prognathous l...
Article
Full-text available
Astyanax stenohalinus Messner, 1962 is redescribed based on type material and new specimens collected in many localities of Argentina and Uruguay. This species is distinguished by a combination of the following characters: possession of hooks in all fins of males, teeth not expanded distally, two or three maxillary teeth, 37-39 perforated scales in...