On the Validity of Several Argentinian Species of Amphisbaena (Squamata, Amphisbaenidae)
I address some taxonomic issues created by previous perceptions of species' boundaries in Amphisbaena from southern South America, including specimens with intermediate characteristics. In this note I propose the synonymization of Amphisbaena trachura and Amphisbaena heterozonata into Amphisbaena darwini, and the maintenance of the current species Amphisbaena angustifrons and Amphisbaena plumbea. Se encaran problemas taxonómicos provocados por decisiones previas sobre algunas especies del cono sur de América del Sur, de las cuales existen ejemplares con características intermedias. Se propone que Amphisbaena trachura y Amphisbaena heterozonata se incluyan en la sinonimia de Amphisbaena darwini, y se propone mantener como especies válidas a Amphisbaena angustifrons y Amphisbaena plumbea.Abstract
Resumen
Distribution of Amphisbaena darwini in South America. Solid squares: Amphisbaena darwini darwini; gray triangles: Amphisbaena darwini trachura; open circles: Amphisbaena darwini heterozonata; white stars: specimens of uncertain subspecific assignment. Shaded area: intergradation area. Localities listed in Appendix 1. Position of study area indicated with square (inset).
Distribution of Amphisbaena angustifrons complex in South America. Solid circles: Amphisbaena angustifrons; open circles: Amphisbaena plumbea; white stars: putative Amphisbaena angustifrons × Amphisbaena plumbea hybrids. Localities listed in Appendix 1. Position of study area indicated with square (inset)
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