Browsing by Autor "Randy L. Powell"
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Item type: Item , Atractus albuquerquei Cunha &amp; Nascimento, 1983 (Serpentes, Dipsadidae): range extension and new country record for Bolivia(Pensoft Publishers, 2020) Randy L. Powell; Cord B. Eversole; Dennis Lizarro; Ashton V. Crocker; Elizabeth A. Surovic; Gonzalo Calderón VacaWe 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.Item type: Item , Bothrops taeniatus Wagler, 1824 (Serpentes, Viperidae): additional country record and list of voucher specimens for Bolivia(Pensoft Publishers, 2020) Randy L. Powell; Cord B. Eversole; Dennis Lizarro; Ashton V. Crocker; Gonzalo Calderón Vaca; Elizabeth A. SurovicWe 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.Item type: Item , Dryophylax chaquensis (Bergna &amp; &Aacute;lvarez, 1993) (Serpentes, Colubridae): first record from Cochabamba Department and a geographic range extension in Bolivia(Pensoft Publishers, 2024) Luis Rolando Rivas; Gabriel Callapa; Patricia Mendoza-Miranda; Arturo Muñoz; Cord B. Eversole; Randy L. PowellWe present novel distributional information on the little-known snake species Dryophylax chaquensis (Bergna & &Aacute;lvarez, 1993) in Bolivia, including the &#64257;rst record from Cochabamba Department. Our record extends the distribution of this species towards the Bolivian Inter-Andean Dry Forests by approximately 63 km to the west (in a straight line) from the nearest known locality in Vallegrande, Santa Cruz, Bolivia. We comment on the biogeographic distribution, altitude of occurrence, and aspects behavior and natural history of D. chaquensis in Bolivia.Item type: Item , Erythrolamprus dorsocorallinus (Esqueda, Natera, La Marca &amp; Ilija-Fistar, 2005) (Squamata: Dipsadidae): range extension, new country record, and comments on color pattern(Pensoft Publishers, 2016) Cord B. Eversole; Randy L. Powell; Dennis Lizarro; Reinaldo Cholima BravoWe present a new country record and significant range extension of Erythrolamprus dorsocorallinus from Bolivia. Locality data on this species is lacking and this account significantly contributes to the knowledge its distributional status throughout South America.Item type: Item , Feliz cumplea&ntilde;os, 21 years for the Beni Anaconda, Eunectes beniensis (Dirksen, 2002) (Serpentes, Boidae): an update of voucher specimens, species&rsquo; distribution, and clarification of locality data of type specimens(Pensoft Publishers, 2023) Randy L. Powell; Cord B. Eversole; Luis Rolando Rivas; Ashton V. Crocker; Paola De la QuintanaLittle information for Eunectes beniensis (Dirksen, 2002) (Serpentes, Boidae) exists in the scientific literature and museum data. We review the natural history, diet, reproduction, distribution of this species and discuss its identifying characteristics. We present new records and discuss the species&rsquo; distribution in Bolivia. As reported in the previous literature, the geographic locality data of the holotype and paratypes are incorrect. We report corrected data for these specimens and update knowledge of the species&rsquo; distributional status and natural history by summarizing novel and existing data from the entirety of this species&rsquo; known range. We provide a distribution map based on vouchered museum specimens.Item type: Item , First confirmed record of Boettger’s Caecilian, Siphonops paulensis Boettger 1892 (Gymnophiona: Siphonopsidae), for the Department of Beni, Bolivia(University of Kansas, 2023) Luis Rolando Rivas; Cord B. Eversole; Randy L. Powelllisted the species from the Department of Beni without any supporting materialItem type: Item , First confirmed records of Teratohyla midas (Lynch & Duellman, 1973) (Anura, Centrolenidae) from Bolivia(Pensoft Publishers, 2024) Luis Rolando Rivas; Arturo Muñoz; Cord B. Eversole; Randy L. Powell; Federico Moreno-AuloDifferent sources of information indicate the possible presence of Teratohyla midas (Lynch & Duellman, 1973) in Bolivia; however, none of them confirm this scenario. Here we confirm the presence of T. midas in the northern Bolivian Amazon (Pando Department) and extend the geographical distribution of the species to include Bolivia. Likewise, we contribute information on some aspects of this species&rsquo; behavior and natural history.Item type: Item , Herpetofauna of the Reserva de la Biósfera Estación Biológica del Beni and the Chimane Reserve Indigenous Territory, Bolivia(Taylor & Francis, 2021) Cord B. Eversole; Randy L. Powell; Dennis Lizarro; Ashton V. Crocker; Gonzalo Calderón Vaca; Paola De la QuintanaIdentifying patterns of herpetofaunal diversity is imperative to the conservation of these species and the ecosystems on which they rely. In this study, we determined species occurrence and composition of the herpetofauna at the Reserva de Biósfera Estación Biológica del Beni and the Chimane Reserve Indigenous Territory. Combined data resulted in documentation of 97 species belonging to 22 families and 50 genera. Reptiles were represented by 14 families and 47 species, while amphibians were represented by eight families and 50 species. This study provides a robust inventory and report of the herpetofauna at this site and delivers data that can be used in future studies. Our results indicate that this site harbors many species, which likely contributes to the collective maintenance of biodiversity in the Bolivian lowlands. Conservation initiatives should consider the collective uniqueness of vertebrate communities maintained by habitat mosaics in this area and strive to implement strategies that preserve and manage landscape-level biodiversity.Item type: Item , Introduction of a novel natural history collection: a model for global scientific collaboration and enhancement of biodiversity infrastructure with a focus on developing countries(Springer Science+Business Media, 2019) Cord B. Eversole; Randy L. Powell; Dennis Lizarro; Federico Moreno; Gonzalo Calderón Vaca; James Aparicio; Ashton V. CrockerItem type: Item , Mussurana bicolor (Peracca, 1904) (Squamata, Colubridae): additional country records and first list of voucher specimens from Bolivia(Pensoft Publishers, 2023) Luis Rolando Rivas; Gabriel Callapa; Cord B. Eversole; Randy L. Powell; Robert B. WallaceWe present country records and a list of voucher specimens for Mussurana bicolor (Peracca, 1904) (Serpentes, Colubridae) from Bolivia. There is scarce information on museum specimens and locality data from Bolivia for this species in the scientific literature. Additionally, we discuss two newly collected specimens from the Llanos de Moxos, a floodplain in the Beni Department. This account contributes to the knowledge of the northwestern distributional status of M. bicolor and summarizes available data for Bolivia.Item type: Item , Ophiophagy in Bothrops mattogrossensis: Predation on Helicops angulatus and potential for reciprocal interactions among Neotropical snakes(Elsevier BV, 2025) Cord B. Eversole; Luis R. Rivas; Randy L. PowellItem type: Item , Reptile Biodiversity and Vulnerability in Bolivia’s Beni Department: Informing Conservation Priorities in a Neglected Frontier(Multidisciplinary Digital Publishing Institute, 2024) Cord B. Eversole; Randy L. Powell; Luis Rolando Rivas; Dennis LizarroThe Department of Beni, in the country of Bolivia, is thought to host a significant level of biodiversity as a result of its tropical, moist, and diverse climate and landscape. However, the biodiversity of Beni is also considered poorly known and understudied due to its inaccessible landscapes, socio-economic challenges, and an overall lack of biodiversity infrastructure. This emphasizes the need for comprehensive species inventories and the development of effective conservation policies and strategies. We conducted an assessment of biodiversity, environmental vulnerability, and conservation status of reptiles documented in Beni. We identified 169 reptile species, spanning three orders and twenty-five families that have been officially documented in Beni. Utilizing the Environmental Vulnerability Score (EVS), we classified these species into high (17.8%), medium (68.1%), and low (14.2%) vulnerability categories, while IUCN categorization revealed 1.8% of reptile species in Beni are classified as vulnerable and 0.6% as near threatened. We found significant differences in ecological drivers of vulnerability among species within all categories (high, medium, low), with habitat specificity and human persecution being significantly higher for high and medium-vulnerability species. Our results demonstrate the intricate vulnerabilities of Beni’s reptiles, highlighting the need for comprehensive, species-specific conservation strategies and planning. Most importantly, our results offer a consolidated framework of information on reptile biodiversity and conservation for researchers, conservationists, and policymakers to use and build upon in the future that will facilitate the development of biodiversity infrastructure not only in the Department of Beni but throughout Bolivia and the NeotropicsItem type: Item , Review of Erythrolamprus taeniogaster (Jan, 1863) (Serpentes, Colubridae) specimens from Bolivia and report of the first record from the Department of Pando(Pensoft Publishers, 2025) Cord B. Eversole; Luis Rolando Rivas; Randy L. Powell; Vincent Antoine Vos; Ruben D. LaymeWe present a new departmental record for Erythrolamprus taeniogaster (Jan, 1863) and discuss the species&rsquo; distribution in Bolivia and South America. There is a lack of consolidated and updated information on museum specimens and associated locality data for this species from Bolivia. This is largely because of changes in taxonomy that are not broadly reflected in contemporary literature and from limited sampling in this part of South America. This information improves knowledge of this species&rsquo; distributional status and summarizes known and available data from the Bolivian portion of its range.Item type: Item , Rhinobothryum lentiginosum (Scopoli, 1788) (Serpentes, Colubridae):&nbsp;additional country record and first list of voucher specimens for Bolivia(Pensoft Publishers, 2021) Randy L. Powell; Cord B. Eversole; Dennis Lizarro; Ashton V. Crocker; Gonzalo Calderón Vaca; Elizabeth A. SurovicWe 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.Item type: Item , Second record of a Marbled Treefrog, <i>Dendropsophus marmoratus</i> Laurenti 1768 (Anura: Hylidae), in the diet of the Banded Cat-eyed Snake, <i>Leptodeira annulata</i> Linnaeus 1758 (Squamata: Colubridae), in the Bolivian Amazon(University of Kansas, 2024) Luis Rolando Rivas; Cord B. Eversole; Randy L. Powell; Vincent Antoine VosItem type: Item , Tropidurus chromatops Harvey &amp; Gutberlet, 1998 (Squamata, Tropiduridae): first records from and range extension to the Beni Department, Bolivia(Pensoft Publishers, 2023) Luis Rolando Rivas; Gil A. Ojopi; Cord B. Eversole; Randy L. Powell; Gabriel CallapaWe present the first records of Tropidurus chromatops Harvey & Gutberlet, 1998 from the Beni Department (Bolivia) and extend this species&rsquo; distribution to western Bolivia by approximately 256 km in a straight line to the Beni Floodplains ecoregion. Likewise, we contribute information on some aspects of the natural history, altitude of occurrence, and the geographic distribution of T. chromatops in the Department of Beni.Item type: Item , Two cases of ophiophagia by Clelia clelia, (Daudin 1803) (Squamata: Colubridae), from the Bolivian Amazon and a list of snake species recorded as prey(University of Kansas, 2023) Luis Rolando Rivas; Vincent Antoine Vos; Cord B. Eversole; Randy L. PowellItem type: Item , Vine snakes (Oxybelis) and Sharpnose snakes (Xenoxybelis) (Squamata, Serpentes) from lowlands of Bolivia, with first records of Oxybelis inkaterra for the country(Pensoft Publishers, 2024) Luis Rolando Rivas; Gustavo Rey-Ortíz; Cord B. Eversole; Randy L. Powell; Gonzalo Navarro-Cornejo; Edson Cortez; Mauricio Ocampo; Gabriel Callapa; Arturo MuñozWe present information on the occurrence of colubrid vine snakes ( Oxybelis ) and dipsadid sharpnose snakes ( Xenoxybelis ) from the lowlands of Bolivia. These genera have been poorly reported from Bolivia and information presented herein includes nine new record provincials from the departments of Beni, Cochabamba, La Paz, Pando, and Santa Cruz, Bolivia. Moreover, we present the first records of Oxybelis inkaterra Jadin, Jowers, Orlofske, Duellman, Blair & Murphy, 2021 from Bolivia and we extend the known range of this species by approximately 207 km (Río Sipia, La Paz) and 628 km (Campamento Guacharos, Cochabamba) southeast of the type locality (Puerto Maldonado, Peru) in South America. In addition, we present morphometric information, meristic characters, coloration pattern, ecological aspects and natural history for the three species of vine snakes ( O. aeneus , O. fulgidus , O. inkaterra ) and two species of sharpnose snakes ( X. argenteus , X. boulengeri ) from the Bolivian lowlands.Item type: Item , Vine snakes (Oxybelis) and Sharpnose snakes (Xenoxybelis) (Squamata, Serpentes) from lowlands of Bolivia, with first records of Oxybelis inkaterra for the country(2026) Luis R. Rivas; Gustavo Rey-Ortíz; Cord B. Eversole; Randy L. Powell; Gonzalo Navarro-Cornejo; Edson Cortez; Mauricio Ocampo; Gabriel Callapa; Arturo MuñozItem type: Item , Westernmost range boundary and first records of Dryophylax hypoconia (Cope, 1860) (Serpentes, Dipsadidae) from Bolivia(Pensoft Publishers, 2025) Cord B. Eversole; Luis Rolando Rivas; Randy L. Powell; Robert B. WallaceWe present the first records of Dryophylax hypoconia (Cope, 1860) from Bolivia and discuss its range in South America. These are currently the westernmost records of this species and extends the known western range by ~900 km from the nearest known range boundary. There is a lack of information for D. hypoconia in the scientific literature, which is largely due to limited sampling across South America and taxonomic uncertainties within this taxon. Our report contributes to the distributional knowledge of this species and summarizes available data from the Bolivian portion of its range.