Cladistic analysis of the Argentinian species of the genus Bostryx (Gastropoda, stylommatophora) based on morphological evidence

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10/2016
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Museu de Zoologia
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Papéis Avulsos de Zoologia
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0031-1049
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1807-0205
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El género Bostryx Troschel, 1847 es encontrado exclusivamente en Sudamérica, desde Ecuador hasta Chile, principalmente en relación a la cordillera de los Andes. La filogenia de Bostryx está basada en caracteres morfológicos de 24 especies de este género, 19 de las cuales correspoden a especies de Argentina, 5 son procedentes de Perú, además de 7 especies representantes de otros géneros, perenecientes a Bulimulidae y Odontostomidae. Una matriz de 31 taxa y 78 caracteres morfológicos (19 de los cuales son continuos y 59 son discretos) de conchilla, sistemas paleal y reproductor, fue analizada bajo pesos implicados con TNT. Las especies argentinas y peruanas del género se agruparon en un clado monofilético soportado por 14 caracteres de conchilla, los cuales son principalmente caracteres continuos de forma de la conchilla.
The genus Bostryx Troschel, 1847 is found exclusively in South America, from Ecuador to Chile and mainly in the Andes mountain range. The phylogeny of Argentinian species of Bostryx was based on morphological characters of 19 species from Argentina, 5 from Peru and 7 from Bostryx-related genera, belonging to Bulimulidae and Odontostomidae. A matrix of 31 taxa and 78 morphological characters (19 of which were continuous and 59 discrete) from shell, pallial and reproductive systems was analysed under implied weighting with TNT. Argentinian species of the genus formed a monophyletic group together with the Peruvian species. The monophyly of this clade was supported by a set of 14 synapomorphies, principally related to continuous characters of the shell shape.
The genus Bostryx Troschel, 1847 is found exclusively in South America, from Ecuador to Chile and mainly in the Andes mountain range. The phylogeny of Argentinian species of Bostryx was based on morphological characters of 19 species from Argentina, 5 from Peru and 7 from Bostryx-related genera, belonging to Bulimulidae and Odontostomidae. A matrix of 31 taxa and 78 morphological characters (19 of which were continuous and 59 discrete) from shell, pallial and reproductive systems was analysed under implied weighting with TNT. Argentinian species of the genus formed a monophyletic group together with the Peruvian species. The monophyly of this clade was supported by a set of 14 synapomorphies, principally related to continuous characters of the shell shape.
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