Alberto Sanchez Vialas

Alberto Sanchez Vialas
The National Museum of Natural Sciences · Biodiversity and Evolutionary Biology

Biological sciences

About

50
Publications
14,887
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106
Citations
Introduction
My current research interest is centered on the evolution of diversity with a main focus on speciation processes, throughout combining molecular and morphological data sources over distinct taxonomic units, such as Arthropoda, Amphibia and Sauropsida.
Additional affiliations
November 2015 - present
The National Museum of Natural Sciences
Position
  • PhD Student
Education
October 2008 - October 2014

Publications

Publications (50)
Article
Full-text available
The taxonomy and nomenclature of Iberian Algyroides are problematic. The first taxon described, A. hidalgoi Boscá, 1916, was based on a single specimen that was subsequently lost. The description of the second taxon, A. marchi Valverde, 1958, was based on the comparison of a newly discovered population with the original description of A. hidalgoi....
Article
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Delimiting species boundaries is a complex challenge usually hindered by overlooked morphological diversification or misinterpretation of geographically structured phenotypic variability. Independent molecular data are extremely useful to characterize and understand such morphological diversity. Morphological and molecular variability of the non-ph...
Article
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Equatorial Guinea is a small west-central African tropical country situated in the Gulf of Guinea. It has a main insular area comprising the volcanic land-bridge island Bioko, the oceanic island Annobón, and a continental part known as Río Muni, which accounts for most of the country’s land area and borders on Cameroon to the north and Gabon to the...
Article
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Flightless, phoretic insects of the tribe Meloini include several widespread species able to inhabit both mainland and oceanic and continental islands. Relationships between phoretic and non-phoretic species of Meloini are unclear, precluding broad evolutionary and biogeographic analyses within the group. We provide a robust molecular phylogenetic...
Article
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The taxonomic status and subgeneric arrangement of the genus Eurymeloe have been debated for decades. In this work, the internal taxonomy of Eurymeloe is redefined by recognising three subgenera: Eurymeloe for the former Eurymeloe brevicollis species group, Coelomeloe for Eurymeloe tuccia, and Bolognaia Ruiz, García-París, Sánchez-Vialas & Recuero,...
Article
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Theraphosidae is the most diversified family of mygalomorph spiders, commonly known as tarantulas. Two genera inhabit the Mediterranean region: Chaetopelma in the east and Ischnocolus mostly in the western part of the Basin. Their phylogenetic position and the validity of some Ischnocolus species remain unclear. We implemented a multilocus target a...
Article
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The host range of parasitoids varies greatly among species: Some only parasitize one to a few hosts (specialists), while others parasitize multiple species or a variety of host types (generalists). The direction of most host range shifts in parasitoid groups, that is from generalist to specialist or, alternatively, from specialist to generalist, is...
Conference Paper
Las colecciones científicas son una infraestructura de investigación única e irremplazable para numerosas áreas de la ciencia. En la actualidad, se estima que en el Museo Nacional de Ciencias Naturales se conservan 10 millones de especímenes, lo que suponen casi la mitad de todos los conservados en España. Esta infraestructura científica o este tes...
Article
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A new species of the genus Mesomeloe (Meloidae) is described from Qatar on the northeastern coast of the Arabian Peninsula. Mesomeloe ottomerkli sp. nov., which is currently only known from the type locality, was previously identified as Meloe (Mesomeloe) coelatus. Both the morphological and molecular variability of M. coelatus across its wide dist...
Article
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We report on the second known specimen of the recently described banded coral snake, Calliophis salitan, identified among the Museo Nacional de Ciencias Naturales collections of Dr. Hipólito Fernández (1886), and originating in Mindanao Island, southern Philippines, as part of the “Comisión Central de Manila,” the Spanish Crown’s effort to catalogu...
Article
The knowledge about geographic distribution of species and intraspecific lineages, and the populations and metapopulations dynamic is essential to stablish conservation bases in many organisms. In recent years, the insight about anostraceans local distribution in the Iberian Peninsula has been greatly increased through taxonomic surveys in temporar...
Article
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Our study seeks to: (1) reduce biodiversity knowledge gaps in amphibians from desert and arid regions; (2) quantify species diversity and detect potential cryptic diversity; (3) identify environmental correlates of amphibian richness distribution, and (4) identify diversity hotspots. DNA barcoding and spatial modelling were integrated to map observ...
Article
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We provide a new record of the poorly studied theraphosid Harpactirella insidiosa (Denis, 1960) from Morocco, which was previously known only from its type locality in the surroundings of Ben Slimane. The new record, based on two adult females, extends the species distribution 210 km southwest from the type locality. These specimens were found at t...
Article
A new epigean species belonging to the genus Troglotayosicus Lourenço, 1981 is described from southern Ecuador based on morphological traits. This enigmatic group of scorpions was known from a single locality in Ecuador and four localities in Colombia. Troglotayosicus muranunkae sp. n. is morphologically similar to the hypogean (troglobite species)...
Poster
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El género Torymus (Hymenoptera, Chalcidoidea, Torymidae) es un grupo de parasitoides con problemas taxonómicos y nomenclaturales, debidos a la dificultad de su estudio. Este grupo presenta diversos grados de rango de hospedador, resultando las más especialistas idóneas en programas de control biológico de su enemigo natural como especie plaga. Un e...
Article
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Monitoring amphibian populations, especially over fragile ecosystems such as arid and semiarid landscapes, helps to detect demographic trends and ecological risks. During several campaigns carried out between 2013 and 2017 across the Moulouya River Basin and the Oriental Region of Morocco, we identified nine amphibian species from the 11 previously...
Article
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Boletin de la Asociacion Herpetologica Española. 30 (1)171-174. En esta nota se describe el primer caso de entrada accidental de un anuro africano en España mediante el mercado de vegetales de consumo. El animal fue encontrado el 14 de marzo de 2019 en un cargamento de bananas procedente de Costa de Marfil de un supermercado. El ejemplar encontrado...
Article
Currently with 85 named species, the family Platyrhacidae in America is still poorly studied, particularly regarding Barydesmus Cook, 1896, the most diversified among the American genera. The center of diversification of Barydesmus lies in the northern third of the Andes Mountains, a megadiverse region where surely more species of these large, cons...
Article
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Se presenta el catálogo de los anfibios y reptiles de Marruecos conservados en el Museo Nacional de Ciencias Naturales de Madrid (MNCN-CSIC) y se destaca la especial relevancia de las contribuciones realizadas por dos expediciones históricas para el conocimiento herpetológico de la región. Ambas expediciones sumaron un total de 31 especies colectad...
Article
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The taxon Petropedetes newtonii was described in 1895 by Bocage, from Bioko Island (Equatorial Guinea). This taxon, whose holotype is lost, has been misidentified since Boulenger’s revision of the genus in 1900 and its relationships with other taxa ( P. vulpiae and P. johnstoni ) is confusing. Currently, P. newtonii is considered a synonym of P. jo...
Article
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Background Congeneric species of reptiles frequently exhibit partitioning in terms of their use of habitats or trophic resources in order to reduce competition. In this study, we investigated habitat use by two species of European skinks: Chalcides bedriagai and Chalcides striatus , based on 49 records from southern France, Spain, and Portugal. Me...
Data
Data describing the environmental variables used in this study
Article
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The study of specimens of the genus Ptychadena of the herpetological collection of the Museo Nacional de Ciencias Naturales de Madrid reveals the first record of Ptychadena schillukorum from Mauritania, extending the known distribution range of the species in West Africa more than 450 km northwards. A key is provided for the four Mauritanian specie...
Article
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Un registro destacable de tamaño en Natrix astreptophora
Conference Paper
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The scientific collection of amphibians and reptiles at the National Museum of Natural History (CSIC) is the most important of herpetology at an Iberian level. It contains material from all continents, highlighting the regions of former Spanish influence, such as South America, West Africa, Equatorial Guinea and the Philippines. The collection cons...
Article
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El examen de ejemplares del género Epicauta de la colección del Museo del Instituto de Zoología Aplicada (MIZA, Venezuela) nos permitió detectar la presencia de ejemplares procedentes de los estados de Lara y Falcón, con características morfológicas singulares. Estos rasgos no permiten su asignación a ninguna de las especies conocidas del género po...
Article
Los registros publicados de Anostraca (Crustacea: Branchiopoda) son relativamente escasos en el centro peninsular. Gran parte del hábitat disponible para estas especies en la meseta central se encuentra confinado en paisajes agrícolas. En el estudio que presentamos se han realizado una serie de muestreos focalizados taxonómicamente para la detecció...
Article
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The presence of a population of Rivetina baetica baetica, a typically littoral taxon endemic to the southernmost regions of Spain and Portugal, was studied for two consecutive reproductive periods in a continental steppe area of Central Spain. Reproduction was successful, representing a considerable range expansion from previous records. Additional...
Research
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Bufo spinosus AmphibiaWeb account
Article
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Habitat description, demography, threats and conservation measures for a urban population of Discoglossus galganoi that has survived in a park of the center of Madrid
Article
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La presente nota proporciona el segundo registro sobre sintopía entre Saurodactylus fasciatus y Saurodactylus brosseti. Ambas especies fueron encontradas separadas por escasos metros en las inmediaciones de Oulad Ayad, provincia de Beni Mellal (Marruecos).
Article
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Nous rapportons la présence de Trogonophis wiegmanni elegans au niveau de deux nouveaux sites qui élargissent la limite sud de l’aire de répartition connue pour cette espèce au Maroc. La niche climatique des deux sous espèces de T. wiegmannia été étudiée en se basant sur les données SIG. Nos résultats indiquent que, contrairement à ce qui avait été...

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