Browsing by Autor "Gustavo Scrocchi"

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    New Species of<i>Apostolepis</i>(Squamata: Colubridae) from the Gran Chaco in Southern Bolivia
    (American Society of Ichthyologists and Herpetologists, 2001) Michael B. Harvey; Lucindo Gonzales A.; Gustavo Scrocchi
    A new species of Apostolepis is described from Izozog in the Gran Chaco of Santa Cruz, Bolivia. It and Apostolepis dorbignyi are the only species known from the Gran Chaco morphoclimatic domain. The new species is one of the most distinctive members of the genus and can be easily distinguished from all congeners by a unique suite of characteristics. Only the third supralabial enters the orbit, and this characteristic is unknown in other elapomorphines. The new species and A. vittata share several apomorphic characters, and these species are hypothesized to be each other's closest relative.Se describe una nueva especie del género Apostolepis de la región de Izozog en el Gran Chaco de Santa Cruz, Bolivia; ésta y Apostolepis dorbignyi son las únicas especies del género conocidas en el dominio morfoclimático del Gran Chaco. La nueva especie posee una serie única de caracteres que la hacen muy distinta y fácilmente diferenciable de las otras especies del género. Sólo la tercera supralabial entra en el ojo, una característica inexistente en otros elapomorfinos. La nueva especiey A. vittata comparten varios caracteres apomórficos por lo que se hipotetiza que son las más estrechamente relacionadas entre sí.
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    Rediscovery of the Rare Atractus bocki, with Assessment of the Taxonomic Status of Atractus canedii (Serpentes: Colubridae: Dipsadinae)
    (The Society for the Study of Amphibians and Reptiles, 2009) Paulo Gustavo Homem Passos; Rodrigo Aguayo; Gustavo Scrocchi
    Atractus bocki was described based on a single specimen from the Cochabamba region in Bolivia, and since its original description, there have been no further records for the species. During the examination of Argentinean and Bolivian collections, we found four additional specimens of this poorly known snake. In this paper, we describe these individuals and report new data on meristic and morphometric variation for A. bocki. We also evaluate the taxonomic status of Atractus canedii and propose its synonymy with A. bocki.