Juan Manuel Díaz Gómez

• Dr.
• Research Associate at National Scientific and Technical Research Council

The Liolaemus boulengeri group is part of the subgenus Eulaemus, genus Liolaemus. This group is widely distributed in Argentina, Bolivia, Chile, and Paraguay, as well as in the Peruvian Titicaca basin and the coasts of Brazil and Uruguay. Here, we combined the revision of a fossil record of Liolaemus, dated at 20 million years (Myr), with relaxed m...

The objective of the present study was to reconstruct the biogeographic history of the monophyletic group Leptodactylus fuscus. We carried out two complementary historical biogeographic approaches: one estimates the ancestral areas with the statistical dispersion and vicariance method (S-DIVA). The other detects disjoint distributions among sister...

Areas of endemism are a standard unit of biogeography and are commonly used for analytical biogeographic analyses as a criterion to identify areas for conservation. Galianthe is a genus of 56 species of mainly herbaceous plants from the family Rubiaceae found in the Neotropics, occurring in campos rupestres (quartzitic rock outcrops), cerrado (sava...

We estimated the potential distribution for 31 amphibian species inhabiting the threatened Austral Yungas under current and future climate projections (2050’s) and assessed the synergistic effects of both climate and land-use changes on the spatio-temporal patterns of species richness. Then, using ZONATION software, we assessed the role of existing...

ABSTRACT Due to lack of information about the precise type locality of Liolaemus andinus, and the subsequent loss of the type material, for a long-time various population of divergent morphological characteristics were assigned to this taxon, which caused the identification of the true L. andinus to become problematic. The present study started in...

Conservation planning relies on integrating existing knowledge, social-environmental contexts, and potential threats to identify gaps and opportunities for action. Here we present a case study on how priority areas for conservation can be determined using existing information on biodiversity occurrence and threats. Specifically, our goals are: (1)...

This study aims to identify events that modeled the historical biogeography of Phymaturus, using three methodologies: Spatial Analysis of Vicariance (VIP), Statistical Dispersal-Vicariance Analysis (S-DIVA), and Bayesian Binary Method MCMC (BBM). In order to assign areas for the Dispersal-Vicariance and the BBM analyses, we preferred not to use pre...

GenBank accession numbers fort the terminals included in the BEAST analysis. (XLSX)

Area units used in the analysis. Political and biogeographic correspondence of areas used in S-DIVA. (DOCX)

Number of records of species of the genus Phymaturus. (DOCX)

Determination of priority conservation areas in the Puna and Prepuna of northern Argentina. There exists a great concern about the loss of biodiversity as a result of destruction and modification of natural habitats caused by human activities. One of the most common solutions to this problem is to establish protected area networks to conserve as ma...

Areas of endemism are central to biogeography. They are used as study units by analytical biogeographic methods and as a criterion to identify areas for conservation. Liolaemidae is one of the most diverse groups of lizards in terms of species richness and environmental diversity. Over the last decade, the number of new species recorded for the gen...

There exists a great concern about the loss of biodiversity as a result of destruction and modification of natural habitats caused by human activities. One of the most common solutions to this problem is to establish protected area networks to conserve as many habitats as possible. The objective of this work was to determine areas of endemism and s...

Within the Liolaemus boulengeri group or 'patch' group, there is a monophyletic clade named Liolaemus fitzingerii group. This clade is composed of large Liolaemus individuals, mostly psammophilus, oviparous and mainly insectivorous, distributed from central Río Negro and Neuquén to the south of Santa Cruz in Argentine Patagonia. We make a taxonomic...

Establishing the ancestral ranges of distribution of a monophyletic clade, called the ancestral area, is one of the central objectives of historical biogeography. In this study, I used three common methodologies to establish the ancestral area of an important clade of Neotropical lizards, the family Liolaemidae. The methods used were: Fitch optimiz...

Regionalization studies attempt to divide an area into regions by studying the distribution of its biota. Here we used snake distribution in Central Argentina to recognize distribution patterns, and then compared two methods (cluster analysis and endemism analysis) and the patterns found with previously defined regions. Both analyses recovered Chac...

Las áreas de endemismo son consideradas la unidad fundamental en biogeografía histórica, dado que son las entidades utilizadas en los análisis biogeográficos. De todas maneras, hasta hace poco tiempo no había métodos formales para su identificación. En este trabajo, apliqué dos métodos diferentes para identificar áreas de endemismo en el género Lio...

Establishing the ancestral area of a group of organisms is one of the central objectives of historical biogeography. I applied three methods of ancestral area analysis, Fitch optimization, weighted ancestral area analysis and dispersal-vicariance analysis (DIVA) to establish the ancestral area of the iguanian lizard genus Phymaturus. I then extende...

Se describen dos nuevas especies de lagartijas del género Liolaemus pertenecientes al grupo chiliensis, una habita en el suroeste de la provincia de Catamarca y la otra en el centro oeste de la Argentina, abarcando las provincias Mendoza, San Juan y Catamarca. La especie que presenta una distribución más septentrional presenta características morfo...

We describe a new species of Liolaemus from the alticolor group that was previously confused with L. alticolor. Populations of this new taxon are distributed in the area of Cuzco and Sicuani, in southeastern Peru (Peruvian province of Cuzco). This new species is disjunct with respect to other members of the alticolor group. We analyzed 82 character...

We provide the description for a new species from Catamarca province, Argentina that belongs to the Liolaemus darwinii group. The new species was previously considered as a population of L. ornatus, but it can be distinguished from that species mainly because of differences on coloration pattern, and its geographic distribution, which is disjunct f...

We provide the description for a new species from Catamarca province, Argentina that belongs to the Liolaemus darwinii group. The new species was previously considered as a population of L. ornatus, but it can be distinguished from that species mainly because of differences on coloration pattern, and its geographic distribution, which is disjunct f...

Although many phylogenetic studies have been made on the genus Liolaemus, they are inappropriate for a biogeographic study because of incomplete taxon sampling. Here we develop a biogeographic analysis using a new phylogenetic study of the chiliensis group, which differs from the other studies in having his members fully represented. The biogeograp...