Estudio crítico de la identidad de Liolaemus buergeri
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Fecha
2022
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es
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Universidad Andrés Bello
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Licencia CC
Licencia CC
Resumen
Los Liolaemus son el género de reptiles más diverso y exitoso que habita en
nuestro país, el cual incluye a Liolaemus buergeri, una especie que habita en
sectores andinos descrita en 1907 por Franz Werner. Desde su caracterización
en esa época L. buergeri ha sido mencionada en diversos trabajos e incluso ha
sido redescrita, sin embargo, debido a ciertas inconsistencias en sus
características morfológicas y su distribución geográfica se piensa que la actual
descripción de esta entidad no es lo suficientemente detallada para determinar si
realmente todo lo que conocemos como L. buergeri pertenece realmente a esta
especie. Esto conduce a realizar una mejor descripción de ella, a través de la
comparación con especímenes pertenecientes a la colección del Museo Nacional
de Historia Natural y algunas recientemente recolectadas; este estudio se realizó
describiendo 41 individuos a través de una matriz de caracteres discretos y
continuos, de los cuales diecisiete están catalogados como L. buergeri y
veinticuatro pertenecen a L. carlosgarini, L. ubaghsi y L. cristiani. Utilizando la
matriz de datos se agruparon los individuos a través del método Cluster y el uso
de bootstrap, además se estudiaron las variables por medio de un análisis de
componentes principales, este último demostró que para este grupo de individuos
no se despejaron variables que pudieran explicar un gran porcentaje de la
varianza. Los resultados de agrupamiento por Cluster mostraron que tres de los
grupos de L. buergeri son estadísticamente significativos, sin embargo, las
similitudes entre grupos no permiten demostrar la hipótesis planteada en este
trabajo. Por lo anteriormente dicho se recomienda complementar este estudio
con un estudio filogenético y nuevas muestras obtenidas exactamente del mismo
lugar que se recolectó la colección original.
Liolaemus is the most diverse and successful genus of reptiles inhabiting our country, which includes Liolaemus buergeri, a species inhabiting Andean sectors, was described in 1907 by Franz Werner. Since its characterization at that time L. buergeri has been mentioned in several works and has even been redescribed, however, due to certain inconsistencies in its morphological characteristics and geographic distribution it is thought that the current description of this species is not detailed enough to determine if everything we know as L. buergeri really belongs to this species. This leads to make a better description of this species, through the comparison with specimens belonging to the collection of the National Museum of Natural History and some recently collected specimens; this study was conducted by describing 41 individuals through a matrix of discrete and continuous characters, of which 17 are cataloged as L. buergeri and 24 belong to L. carlosgarini, L. ubaghsi and L. cristiani. Using the data matrix, the individuals were grouped through the Cluster method and the use of bootstrap, and the variables were also studied by means of a principal component analysis, the latter showed that for this group of individuals no variables were found that could explain a large percentage of the variance. The results of clustering showed that three of the groups of L. buergeri are statistically significant; however, the similarities between groups do not allow demonstrating the hypothesis proposed in this work. Therefore, it is recommended to complement this study with a phylogenetic study and new samples obtained from exactly the same place where the original collection was collected.
Liolaemus is the most diverse and successful genus of reptiles inhabiting our country, which includes Liolaemus buergeri, a species inhabiting Andean sectors, was described in 1907 by Franz Werner. Since its characterization at that time L. buergeri has been mentioned in several works and has even been redescribed, however, due to certain inconsistencies in its morphological characteristics and geographic distribution it is thought that the current description of this species is not detailed enough to determine if everything we know as L. buergeri really belongs to this species. This leads to make a better description of this species, through the comparison with specimens belonging to the collection of the National Museum of Natural History and some recently collected specimens; this study was conducted by describing 41 individuals through a matrix of discrete and continuous characters, of which 17 are cataloged as L. buergeri and 24 belong to L. carlosgarini, L. ubaghsi and L. cristiani. Using the data matrix, the individuals were grouped through the Cluster method and the use of bootstrap, and the variables were also studied by means of a principal component analysis, the latter showed that for this group of individuals no variables were found that could explain a large percentage of the variance. The results of clustering showed that three of the groups of L. buergeri are statistically significant; however, the similarities between groups do not allow demonstrating the hypothesis proposed in this work. Therefore, it is recommended to complement this study with a phylogenetic study and new samples obtained from exactly the same place where the original collection was collected.
Notas
Tesis (Licenciado en Biología)
Palabras clave
Liolaemus Buergeri, Clasificación, Identificación, Reptiles