Wilson Sebastián SerraMuseo Nacional de Historia Natural - Montevideo, Uruguay · Secc. Ictiología & Secc. Entomología - Dpto. de Zoología
Wilson Sebastián Serra
MSc.
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Introduction
Publications
Publications (67)
The knowledge about the diversity and phylogeny of South American callichthyid armored catfishes of the sub-family Corydoradinae is still growing, after important recent contributions, and many species have uncertain relationships. In this study, we present the first combined phylogenetic hypothesis for the genus based on five genes, 83 morphologic...
Clinostomids are a group of digeneans in which substantial diversity has been recently discovered, with some metacercariae specific to their fish hosts. Genetic analysis has been instrumental in elucidating species diversity within this genus. Recently, seven COI lineages were reported in Argentina, along with three metacercarial morphotypes lackin...
Clinostomids are a group of digeneans in which substantial diversity has been recently discovered, with some metacercariae specific to their fish hosts. Genetic analysis has been instrumental in elucidating species diversity within this genus. Recently, seven COI lineages were reported in Argentina, along with three metacercarial morphotypes lackin...
A recent expedition to northern Uruguay revealed the presence of the triportheid fish Engraulisoma taeniatum Castro, 1981, which represents the first record of this species in the Uruguay River Basin and for the country. We indicate it as an endangered species for Uruguay considering its restricted distribution in the country and its taxonomic sing...
Distribución espacio-temporal de los varamientos de Hippocampus patagonicus (caballito de mar patagónico) en la costa uruguaya. Se caracterizaron estos eventos usando datos de ciencia ciudadana y colecciones biológicas. Entre 2005 y 2024, se registraron 37 eventos, coincidiendo los varamientos masivos con vientos del oeste-suroeste. El estudio dest...
The banjo catfish, Xyliphius barbatus , belongs to the Aspredinidae family and typically inhabits the main channels of medium to large rivers in the La Plata River basin. The mimetic coloration with the substrate and the benthic lifestyle likely contribute to the challenge of sampling this species, resulting in its underrepresentation in museums an...
A new killifish species was discovered in the heart of the Paraná Forest ecoregion, in a small temporary puddle among the jungle trees. Argolebias adrianae represents a novel addition to the world of killifishes. This small species thrives in an ephemeral and ever-changing environment, a temporary wetland on the banks of the Iguazú River, where the...
Una nueva especie de pez que vive en charcos temporarios de lluvia es descubierta en el corazón de la Selva Misionera, a pasos de las Cataratas del Iguazú. Una nueva especie de pez killi fue descubierta en el corazón de la ecorregión del Bosque Paraná, en un pequeño charco temporario entre los árboles de la selva. Argolebias adrianae, representa un...
We describe Argolebias adrianae, a new species of killifish from a small temporary wetland in the Paraná Forest ecoregion with no regular or predictable temporal pattern of water availability. This habitat is in the Lower Iguazú River Basin, known for its high fish endemism, but until now, only two species of Rivulidae were reported from it, but fr...
Diapoma pampeana was recently described to occur in the upper Negro basin in Uruguay and Brazil. An isolated population tentatively identified as D. pampeana from the Pando stream, a perturbed coastal drainage in Uruguay, is studied and compared under the light of morphological and molecular data to test if there is evidence to consider it as a sep...
Un reciente estudio sobre la evolución de los peces del género Austrolebias ha generado importantes hallazgos sobre su clasificación y evolución. Este estudio, ha permitido dividir este grupo en 11 géneros, incluyendo 4 nuevos, y ha brindado una mayor claridad sobre la evolución y características de estos singulares peces. A continuación, destacamo...
En las charcas temporarias del Río Paraná Medio, en el corazón de la provincia de Misiones, Argentina, se ha descubierto una nueva especie de pez estacional, Argolebias guarani, con una impactante coloración en los machos. Su cuerpo y aletas están completamente cubiertos de iridiscencias turquesas. Este asombroso pez habita en charcas que se forman...
A recent study invetigating the evolution of Austrolebias
In the temporary ponds of the Middle Paraná River, in the heart of the province of Misiones, Argentina, a new seasonal fish species has been discovered: Argolebias guarani. This species exhibits a striking coloration in males, with their bodies and fins completely covered with turquoise iridescent blotches. This astonishing fish inhabits ponds that...
Killifishes (Cyprinodontiformes) are a group of fish that include a high proportion of small-bodied species living in seasonal aquatic habitats, with narrow geographical distributions and high human impact. They are among the most vulnerable vertebrates in the Neotropical region, with nearly half of the species in threat categories. Herein, we prop...
In this note we present the first evidence based record for Hypostomus isbrueckeri from Argentina and extend its known geographical distribution 500 km to the SW of the previous mentions.
El género Hippocampus agrupa ca. 40 especies, reconociéndose actualmente tres para el Atlántico sudoccidental: Hippocampus erectus, Hippocampus reidi e Hippocampus patagonicus. Para aguas uruguayas la bibliografía registra seis especies: Hippocampus guttulatus, Syngnathus caballus, Hippocampus punctulatus, Hippocampus erectus, Hippocampus reidi e H...
The examination of specimens collected during a recent expedition to the lower Yaguarón river basin (northeastern Uruguay), revealed the presence of the critically endangered killifish Aus-trolebias univentripinnis Costa and Cheffe, 2005, which represents the first record of this species for the country. Morphometric differences with Brazilian popu...
The total count of freshwater fishes found in Uruguay has gone up by eight to 311. Changes are restricted to characiforms and siluriforms, being Scleronema the most effected genus. For this update we count with two new species based on type material from Uruguay, six first recods, one synonymy, and the negative record for Scleronema operculatum, wh...
Hippocampus patagonicus se distribuye en el Atlántico Sudoccidental entre Recife (Brasil) y Puerto Madryn (Argentina). Si bien Uruguay es un punto clave en su distribución, los estudios sobre el género son escasos, siendo la mayoría de las referencias citas secundarias sin material asociado. Hasta el momento, hay un único reporte de esta especie pa...
The faunistic record must ideally rely on physical evidence, notably concerning species that are difficult to identify due to taxonomic characters not observable by simple visual inspection. Based on material deposited in the Museo Nacional de Historia Natural, Montevideo, we here confirm the presence of Aphyocharax rathbuni, Oligosarcus robustus,...
The South American brackish water snail Heleobia charruana (d'Orbigny, 1841), abundant in Uruguay, is newly recorded for three western European countries: the United Kingdom (2003), the Netherlands (2014) and Belgium (2017). Its identity was confirmed using morphological and molecular methods. The method successfully used to isolate DNA and to furt...
Zungaro jahu is a siluriform fish well known from the Paraná river but also recorded from
the Argentinean coast of the La Plata river, based on well confirmed and illustrated records. The presence of Z. jahu is confirmed for the Uruguayan territory, based on a single juvenile specimen collected in the La Plata river (Colonia county) in 1966. Other...
Due to an unfortunate turn of events, the incorrect caption of Fig. 2 appeared in the original publication. Figure 2 and its correct caption is published here and should be treated as definitive.
Analyses of collections and recently captured specimens in an expedition to lower Yaguarón river basin in northeastern Uruguay, revealed the presence of the loricariid catfish 'Hemiancistrus' punctulatus Cardozo & Malabarba, 1999, which represents the first record of this species for the country. We propose it as an endangered species for Uruguay c...
Probably the last place one would expect to find a fish is out of the water, and much less buried underground. However, there are some fish that live in rain ponds that dry completely for long periods and survive because they have eggs that resist desiccation buried at the bottom of the puddle. With the arrivals of the rains these ponds accumulate...
Probablemente el último lugar en el que uno esperaría encontrar un pez es fuera del agua, y mucho menos enterrado bajo tierra. Sin embargo, hay unos peces que viven en charcas de lluvia que se secan completamente durante largos periodos y sobreviven gracias a que tienen huevos que resisten el desecamiento enterrados en el fondo del charco. Con las...
It is a pleasure to announce that Wilson Sebastián Serra has joined our team starting with this update and that finally an ichthyologist from Uruguay is participating in this project. Sebastián works as curator of the ichthyological collection at the Museo Nacional de Historia Natural in Montevideo.
Since the publishing of the second update to CLOF...
For more than 150 years Oligosarcus hepsetus (Cuvier, 1829) has been considered to be distributed in the freshwaters of Argentina and Uruguay. An analysis of literature accounts revealed that the records of this species from these countries were erroneous due to misidentifications with either Oligosarcus oligolepis (Steindachner, 1867) or O. jenyns...
This study attempts to characterize species boundaries in the hybrid zone between two taxa of the South American killifish genus Austrolebias (Cyprinodontiformes: Rivulidae), A. charrua and A. reicherti, to test mechanisms underlying secondary contact and introgression. The hybrid zone spans in a narrow area of approximately 106 km² in the Patos-Me...
The genus Austrolebias (Cyprinodontiformes: Rivulidae) represents a specious group of taxa following annual life cycles in the neotropical ichthyofauna. They live in temporary ponds and each generation must be completed in a few months, depending on environmental stochasticity. Annual fish survive the dry season through diapausing eggs buried in th...
Recent expeditions to northeastern Argentina in the Paraná River revealed the presence of the armored catfish Loricariichthys edentatus Reis & Pereira 2000, which represents the first record of this species to that basin.
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...
List of material examined.
(PDF)
Character matrix used for the phylogenetic analysis.
(TNT)
Phylogenetic relationships and molecular species delimitation from BEAST analysis.
(PDF)
The objective of the present paper was to characterize the morphological and genetic patterns of variability in four taxa of the Austrolebias robustus species group distributed in two of the major southernmost river basins in South America. We compared results from the two approaches followed in this study to access hypotheses of species limits usi...
El presente libro se focaliza en las especies ícticas más abundantes y/o representativas del río Uruguay en su tramo compartido entre Argentina y Uruguay, llegando a un total de 81 especies. El mismo tiene por objeto obrar de guía de campo práctica y visual para el público en general, e incluye consideraciones generales a nivel geográfico, ictiológ...
A new mouth breeder species of Gymnogeophagus is described from a tributary of the río Uruguay. It is distinguished from most species of the genus by the presence of hypertrophied lips, and from G. labiatus and G. pseudolabiatus by the color pattern. The presence of successive allopatric species of the Gymnogeophagus gymnogenys clade inhabiting the...
In this article we describe a new species of the annual fish genus Austrolebias from the lower Uruguay river basin. The fusion of the urogenital papilla to the first anal fin ray in males and the pigmentation pattern, indicates a close relationship with the clade formed by A.bellottii , A.melanoorus , and A.univentripinnis . The new species can be...
The family Rivulidae is the fourth most diverse clade of Neotropical fishes. Together with some genera of the related African family Nothobranchiidae, many rivulids exhibit a characteristic annual life cycle, with diapausing eggs and delayed embryonic development, which allows them to survive in the challenging seasonal ponds that they inhabit. Riv...
Specimens of the characid genus Serrapinnus housed in Uruguayan collections are reviewed to clarify their identities. Serrapinnus kriegi (Schindler, 1937) is recorded for the first time in the country while the presence of Serrapinnus calliurus (Boulenger, 1900), previously reported as Serrapinnus piaba (Lütken, 1875), is confirmed. Both were colle...
Despite being an important habitat for biodiversity, autoecology studies of fish in artificial water reservoirs in the Pampas grasslands are scarce. The present study explores aspects of population ecology and trophic interactions of four fish species inhabiting these habitats at the hilly area of the Pampas, Uruguay. We performed a seasonal sampli...
A comparative study on size and shape of Leptuca uruguayensis was carried out between populations from Garças River, Brazil (BP), and Solís Grande River, Uruguay (UP). The size of the onset of sexual maturity was also estimated for UP. A total of 36 crabs BP and 387 crabs UP were analyzed. In the relative growth analysis, carapace width (CW) for bo...
Pimelodus absconditus and Triportheus nematurus are two poorly known species poorly represented in Uruguay. We report new records of both species, with implications on their geographical distribution.
The freshwater cnidarian Craspedacusta sowerbii Lankester 1880, has invaded lakes and ponds as well as artificial water bodies throughout the world. The first record in Uruguay corresponding to the jellyfish was made in 1961 in two artificial fountains, with no mention of the polyp form. Although local reports of other related polyp species have be...
New records of the cubozoan jellyfish Tamoya haplonema in Uruguayan waters are reported together with historical records for the region, and associated with the oceanographic conditions at the moment of the finding. Occurrences of the species are mainly associated with positive Sea Surface Temperature Anomalies especially during summer months when...
RESUMEN: La tribu Phylloscyrtini comprende 21 especies de pequeños grillos que se distribuyen desde EEUU a la Argentina, de las que poco se conoce sobre su biología. Se comunica el primer registro de dicha tribu para Uruguay, con la presencia de la especie Cranistus colliurides Stål, 1861.
ABSTRACT: First record of Cranistus colliurides Stål, 186...
El presente documento es el resultado del trabajo coordinado por un grupo de investigadores del MNHN con el objetivo de monitorear el estado de conservación de la biodiversidad del Paisaje Protegido Quebrada de los Cuervos (PPQC). Para esto se seleccionaron 88 indicadores asociados a cinco objetos focales de conservación del Plan de Manejo: pastiza...
The pharyngeal jaw apparatus is a key innovation hypothesised to increase foraging efficiency and facilitate utilisation of novel resources among teleost fishes. Here, we tested whether dietary characteristics could predict pharyngeal jaw morphology among eight species of Neotropical Crenicichla. Additionally, we tested the hypothesis that pharynge...
Mola mola is distributed from temperate to tropical oceans. The scarce reports on the occurrence of the species in the Uruguayan coast were based on incomplete morphological studies on collected specimens that could not properly discard the congeneric Mola ramsayi. This work constitutes confirmation of the occurrence of Mola mola in the coastal are...
La exuberante diversidad de peces neotropicales se ve reflejada en los ambientes de agua
dulce de Uruguay. El Río Negro, el afluente más austral del Río Uruguay, está habitado por
más de 120 especies de peces, alguna de ellas con su distribución geográfica restringida
casi exclusivamente a su cuenca.
En este libro hacemos una revisión de la taxonom...
Resumen: Se entrega una lista sistemática de los Coccinellidae de Uruguay. Se incluye sinonimia, observaciones respecto a la si-tuación taxonómica de las especies y su distribución geográfica. Se citan 27 géneros con 53 especies, de las cuales se citan 10 por primera vez para Uruguay.
Systematic checklist and geographical distribution of the Cocc...
In this article the authors present the first report of four characiform fish species for Uruguay, extending their
current distribution to the middle and lower Uruguay River basin: Astyanax saguazu Casciotta, Almirón and Azpelicueta, 2003; Hypobrycon poi Almirón, Casciotta, Azpelicueta and Cione, 2001; Leporinus amae Gody, 1980; Cyphocharax saladen...
In this article the authors present the first report of four characiform fish species for Uruguay, extending their current distribution to the middle and lower Uruguay River basin: Astyanax saguazu Casciotta, Almirón and Azpelicueta, 2003; Hypobrycon poi Almirón, Casciotta, Azpelicueta and Cione, 2001; Leporinus amae Gody, 1980; Cyphocharax saladen...
Ecological speciation is well-known from adaptive radiations in cichlid fishes inhabiting lentic ecosystems throughout the African rift valley and Central America. Here, we investigate the ecological and morphological diversification of a recently discovered lotic predatory Neotropical cichlid species flock in subtropical South America. We document...
Ontogenetic diet shifts were compared among five sympatric pike cichlids Crenicichla in a subtropical South American stream using stable C and N isotopes and tissue stoichiometry (C:N). Within species, stable N isotopes were positively related to body size while C:N showed negative relationships. Stable C isotopes, however, were not related to body...
Cerro Verde (Rocha, Uruguay), ha sido recientemente declarada Área Marina Protegida (AMP), sin embargo el conocimiento de la diversidad de invertebrados marinos en el área es incipiente y dispar. En particular, los crustáceos decápodos tienen un rol ecológico muy relevante, siendo una fracción importante en la dieta de especies de interés comercial...
Based on National Ichthyological Collections revision, the first record of the eleotrid Dormitator maculatus and the gobiid Ctenogobius shufeldti in Uruguay are presented, being the southernmost locality for the first species.
We report new records of Potamorhina squamoralevis (Braga & Azpelicueta, 1983) and Plagioscion ternetzi Boulenger, 1895, two poorly known species for Uruguay. Their presence was uncertain due to its low occurrence, although both species have been listed for Uruguay. We report new records and extend the known geographic distribution for Uruguay.
The present note is the first record of the pike cichlid Crenicichla tendybaguassu for Uruguay, extending its
distribution about 400 km to the South. The presence of C. tendybaguassu and their co-occurrence with other priority species for conservation in Uruguay adds greater value to conservation of the Cuareim River (Middle Uruguay River). Colorat...
Based on National Collections records, this article presents the first report of eight freshwater fish speciesfor Uruguay in the middle and lower Uruguay River basin, extending their current distribution: Cyanocharax alegretensisMalabarba and Weitzman, 2003; Leporinus lacustris Amaral Campos, 1945; Microglanis aff. eurystoma Malabarba andMahler, 19...
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