Spatial distribution of the snake genus Chironius in Bolivia

The genus Chironius is a diurnal group of medium to large, terrestrial-arboreal, colubrid snakes distributed throughout Central and South America. The genus' broad Neotropical distribution and lack of current knowledge inspired this study. Currently, 10 species of Chironius occur within the geographic boundaries of Bolivia. An updated species distribution map (SDM) of four Bolivian Chironius species, specifically C. exoletus, C. flavolineatus, C. fuscus, and C. scurrulus, was made using data from the 2014-2019 Powell/Eversole Bolivian field expeditions and the information in published scientific papers and online databases (i.e., VertNet, ARCTOS, GBIF, speciesLink). ArcGIS software was used to develop the current range maps. Also, data layers (i.e., climate, vegetation, landcover) currently available for Bolivia were used to examine the relationships between ecological variables and distribution patterns. Using spatial analysis options in ArcGIS and overlaying the data points, patterns of clustering and habitat preference were identified in Chironius and analyzed for the four species listed above. In general, Chironius showed a preference to inhabit lowland tropical rainforests, humid montane forests, and savannas or open formations. This agrees with much of the literature. Specifics on climate, land cover, and vegetation for the species is also analyzed, and possible explanations are briefly explored. The increase in the populations of the major cities in different Departments of Bolivia is having a large effect on the habitats of Chironius and is more of a threat to wildlife than global warming currently. The limits and biases in the data due to poor sampling and incomplete records is noted

Atractus albuquerquei Cunha & Nascimento, 1983 (Serpentes, Dipsadidae): range extension and new country record for Bolivia

We present a new country record and range extension for Atractus albuquerqueri Cunha and Nascimento, 1983 (Serpentes, Dipsadidae) from Bolivia. There is a paucity of published information on locality data and information on this species and this account contributes to the knowledge of its distributional status

Bothrops taeniatus Wagler, 1824 (Serpentes, Viperidae): additional country record and list of voucher specimens for Bolivia

We present a new country record and range extension for the snake species Bothrops taeniatus Wagler, 1824 (Serpentes, Viperidae). The specimen represents the northeastmost record in Bolivia and fills the distributional gap between the known Brazilian and Bolivian populations. There is a paucity of published information on locality data and information on this species and this account contributes to the knowledge of its distributional status

Rhinobothryum lentiginosum (Scopoli, 1788) (Serpentes, Colubridae): additional country record and first list of voucher specimens for Bolivia

We present an additional country record and a list of voucher specimens for Rhinobothryum lentiginosum (Scopoli, 1788) (Serpentes, Colubridae) from Bolivia. Very little published information on museum specimens and locality data from Bolivia exists for this species. This account contributes to the knowledge of its distributional status by summarizing all available data