Análisis morfológico y morfométrico de Tityus (Tityus) sorataensis Kraepelin 1911 (Escorpionida: Buthidae) de dos valles mesotérmicos andinos, Quime y Cheje, La Paz-Bolivia
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J. Selva Andina Res. Soc.
Abstract
En el mundo se describieron unas 2000 especies de escorpiones divididas entre 22 familias. En Bolivia, los escorpiones de la familia Buthidae están representados por el género Tityus. El objetivo del presente trabajo fue realizar una caracterización morfológica-morfométrica de linajes intraespecíficos Tityus (Tityus) sorataensis Kraepelin 1911 de dos comunidades de La Paz-Bolivia. Se trabajó con 85 muestras de Tityus (Tityus) sorataensis de la colección científica del Laboratorio de Producción de Antiveninas de INLASA. Con estas, se realizó una descripción morfológica a nivel de especies y morfotipos, así como una descripción morfométrica tradicional con 34 variables. Las variables fueron analizadas con los programas Statistica 7 y JMP, en las cuales se realizó análisis de componentes principales (ACP) y análisis generalizados de discriminantes (AGD). Se encontró que Tityus (Tityus) sorataensis presenta seis morfotipos para Quime Q, Z, X, Y, G, R y tres para Cheje Y, G, R. Se encontró dimorfismo sexual en los morfotipos, X, G, R. Se observó que excluyendo las variables merísticas diagnósticas aún existía diferenciación a nivel morfométrico. Se identificaron diez variables morfométricas fenotípicas diagnósticas entre todos nuestros análisis: largo del prosoma, ancho mediano del prosoma, ancho posterior del prosoma, primer ojo lateral hasta ojos medianos, ancho del ocular mediano, longitud del segmento caudal II, ancho del segmento caudal II, longitud del segmento caudal III, longitud del telson y longitud del metasoma.
Around 2000 species of scorpions divided into 22 families were described in the world. In Bolivia, the scorpions of the family Buthidae are represented by the genus Tityus. The objective of this work is to perform a morphological-morphometric characterization of intraspecific lineages Tityus (Tityus) sorataensis Kraepelin 1911 from two communities of La Paz-Bolivia. 85 samples of Tityus (Tityus) sorataensis from the scientific collection of the INLASA Antivenin Production Laboratory were used. With these, a morphological description was made at the level of species and morphotypes, as well as a traditional morphometric description with 34 variables. The variables were analyzed with the Statistica 7 and JMP programs, in which principal component analysis (PCA) and generalized discriminant analysis (AGD) were performed. It was found that Tityus (Tityus) sorataensis presents six morphotypes for Chime Q, Z, X, Y, G, R and three for Cheje Y, G, R. Sexual dimorphism was found in morphotypes, X, G, R. It was observed that excluding the diagnostic meristic variables, there was still differentiation at the morphometric level. Ten diagnostic phenotypic morphometric variables were identified among all our analyzes: prosome length, median prosome width, posterior prosome width, first lateral eye to median eyes, median eyepiece width, length of caudal segment II, width of caudal segment II, length of caudal segment III, telson length and length of the metasoma.
Around 2000 species of scorpions divided into 22 families were described in the world. In Bolivia, the scorpions of the family Buthidae are represented by the genus Tityus. The objective of this work is to perform a morphological-morphometric characterization of intraspecific lineages Tityus (Tityus) sorataensis Kraepelin 1911 from two communities of La Paz-Bolivia. 85 samples of Tityus (Tityus) sorataensis from the scientific collection of the INLASA Antivenin Production Laboratory were used. With these, a morphological description was made at the level of species and morphotypes, as well as a traditional morphometric description with 34 variables. The variables were analyzed with the Statistica 7 and JMP programs, in which principal component analysis (PCA) and generalized discriminant analysis (AGD) were performed. It was found that Tityus (Tityus) sorataensis presents six morphotypes for Chime Q, Z, X, Y, G, R and three for Cheje Y, G, R. Sexual dimorphism was found in morphotypes, X, G, R. It was observed that excluding the diagnostic meristic variables, there was still differentiation at the morphometric level. Ten diagnostic phenotypic morphometric variables were identified among all our analyzes: prosome length, median prosome width, posterior prosome width, first lateral eye to median eyes, median eyepiece width, length of caudal segment II, width of caudal segment II, length of caudal segment III, telson length and length of the metasoma.
Description
Vol. 12, No. 1