Víctor R. Pacheco

Víctor R. Pacheco
National University of San Marcos | UNMSM · Museo de Historia Natural

Ph.D.

About

203
Publications
92,228
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Introduction
I work on taxonomy, systematics and biogeography of Neotropical mammals, specially bats and rodents. My interest is at present mainly centered in uncovering the hidden diversity of mammals and their patterns of distributions, and in student formation. I use this experience in my practice with issues in conservation, zoonosis, emerging disease, collection management, and species modeling. I am also professor at San Marcos University and Curator of Mammals at Museo de Historia Natural, Lima.
Additional affiliations
January 1989 - present
National University of San Marcos
Position
  • Jefe Departamento Mastozoología

Publications

Publications (203)
Article
Full-text access to a view-only version of this paper: https://rdcu.be/cFtQy Monodelphis ronaldi is a short-tailed opossum currently known only by the holotype captured in Madre de Dios, Peru. The relationships of this species with other congeners are unknown, although it has been hypothesized to belong to the subgenus Mygalodelphys. Here, we repo...
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En el presente trabajo, presentamos una lista actualizada de mamíferos mayores para Loreto compuesta por 72 especies en 8 órdenes y 25 familias. Esta lista fue elaborada a partir de la minuciosa revisión de bases de datos, colecciones zoológicas y publicaciones científicas. En Loreto se encuentran 5 especies endémicas nacionales: Lagothrix flavicau...
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En este trabajo realizamos una revisión exhaustiva de bases de datos de colecciones científicas y literatura especializada con el objetivo de actualizar la lista de los mamíferos menores no voladores (<1000 g aprox.) del departamento de Loreto. Como resultado se contabilizaron 536 localidades en la que se registran 75 especies, agrupadas en cuatro...
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En este trabajo presentamos una lista actualizada de los murciélagos de Loreto basada en la revisión de bases de datos, colecciones científicas y literatura especializada. Encontramos que Loreto es el departamento con mayor diversidad de murciélagos del Perú, con 114 especies agrupadas en 7 familias (19.9% de la mastofauna peruana), y que incluyen...
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La lista de mamíferos del Perú más reciente, publicada en el año 2020, compiló un total de 569 especies y 82 especies endémicas, sin embargo, en corto tiempo varios cambios taxonómicos han ocurrido y obligan a presentar otra lista actualizada de todas las especies de mamíferos con registros en el Perú. Esta nueva lista actualizada hasta noviembre d...
Article
Lagothrix flavicauda (Humboldt, 1812), commonly known as the yellow-tailed woolly monkey, is one of the largest New World primates. Its diet is based on fruits and leaves, and occasionally flowers, buds, epiphyte roots, invertebrates, and some vertebrates. It is endemic to the cloud forests of northern Peru, in Amazonas, San Martín, Huánuco, Junín,...
Article
Nephelomys albigularis is a sigmodontine rodent of the tribe Oryzomyini distributed in the Andean forests from central Ecuador to central Peru. Although several studies recognize this species as monotypic, significant morphological variation has been reported in Peruvian populations that were not properly assessed by direct comparisons with the typ...
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We describe a new species of the cricetid rodent Thomasomys (Sigmodontinae) of the "aureus" group based on four specimens collected from Carmen de la Frontera, Piura Department, Peru. This new species has a very long and white tail, very long mystacial vibrissae that extend posteriorly beyond the pinnae, and a distinctive cranial and dental morphol...
Article
The phylogenetic position of the “Upper yungas inca hocicudo” Oxymycterus juliacae , one of the lesser-known species of the genus Oxymycterus , is still unresolved. Several authors considered it a subspecies or synonym of Oxymycterus inca, but more recently, it was recognized as a valid species based on morphometric analysis and morphological trait...
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Echimys saturnus Thomas, 1928 is an echimyid rodent that has been recorded in lowland, premontane and montane forests in Ecuador and lowland forests in Peru. Here, we report five new records of this species in the Peruvian Yungas ecoregion. Our records come from Amazonas, San Martín, and Huánuco departments. The Huánuco specimen, collected at 3300...
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The Seasonally Dry Tropical Forests in Peru are well known for their bird and plant diversity and endemicity, but little is known about the diversity of small mammals. We report the diversity of small volant and non-volant mammals from the Seasonally Dry Tropical Forests of the Huallaga river basin in the San Martín Department, working on both side...
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Cavia tschudii inhabits coastal and Andean wetlands where it is important prey for medium carnivores, but its habitat selection and its role in the wetlands are unknown. In order to reduce this lack of knowledge, we evaluated changes in the abundance for two seasons and the habitat selection of C. tschudii in a wetland on the central coast of Peru....
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Thomasomys princeps (Thomas, 1895) is a large, sigmodontine rat and a member of the "aureus" group of the highly diverse genus Thomasomys. This species is only known from the Cordillera Oriental, Colombia; however, based on a recent examination of specimens of Thomasomys from Venezuela, I report the first record of T. princeps from Venezuela, in th...
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We assessed the variation of both composition and functional diversity of mammals along an elevation gradient (1600-3600 masl) at the Tabaconas Namballe National Sanctuary (TNNS) in northern Peru. Using a camera-trap design (85 stations, 8,825 camera days, ~ 317 km 2), we recorded a total of 33 mammalian species during the dry season of 2016. Speci...
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Los humedales son ecosistemas frágiles e importantes que, a pesar de su gran biodiversidad, se conoce poco sobre la diversidad de mamíferos. Por ello, en este estudio se documenta la diversidad y abundancia de los mamíferos pequeños de cuatro humedales de la costa central peruana: Albufera de Medio Mundo, Refugio de vida silvestre Pantanos de Villa...
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Closed-canopy rainforests are important for climate (influencing atmospheric circulation, albedo, carbon storage, etc.) and ecology (harboring the highest biodiversity of continental regions). Of all rainforests, Amazonia is the world's most diverse, including the highest mammalian species richness. However, little is known about niche structure, e...
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The molossid bat Tadarida brasiliensis has a wide and apparently continuous distribution in South America. Although it has been reported in several localities of both versants of the Peruvian Andes, the potential distribution for this species has not been formally analyzed. Therefore, we describe its distributional pattern in the territory and prov...
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This work summarizes recent knowledge regarding the diversity and distribution of 11 Orders of mammals from Peru. Species information is presented for the cou-ntry, ecoregions and, for the first time, by individual departments. Furthermore, we identified endemic species for the country and provided elevation ranges per species. To compile our infor...
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This work summarizes recent knowledge regarding the diversity and distribution of 11 Orders of mammals from Peru. Species information is presented for the country, ecoregions and, for the first time, by individual departments. Furthermore, we identified endemic species for the country and provided elevation ranges per species. To compile our inform...
Article
La helmintofauna en marsupiales del Perú es uno de los grupos menos investigados y conocidos. Por ello, en este trabajo se investiga la helmintofauna del género Didelphis Linnaeus, 1758, en base a cuatro especímenes recientemente colectados en el norte del Perú (tres ejemplares de Didelphis marsupialis Linnaeus, 1758 de San Felipe de Vichayal, Piur...
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Neusticomys peruviensis is a poorly known sigmodontine rodent of the tribe Ichthyomyini, represented in collections by only five specimens collected in five localities from lowland forests of central and southern Peru. Recent expeditions in Llanchama, in northern Peru, north of the Río Amazonas, and near Allpahuayo Mishana Natural Reserve (Loreto,...
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En mamíferos silvestres los patrones de coloración atípica como el albinismo ocurren en baja frecuencia y en la literatura científica sus reportes son escasos. Por lo cual los hallazgos de este tipo son importantes para comprender mejor este fenómeno. En el presente trabajo realizamos el primer reporte de albinismo para el cuy sil-vestre Cavia tsch...
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The Lesser bandicoot rat Bandicota bengalensis (Gray and Hardwicke, 1833) is a murid rodent distributed mostly in Asia that can cause substantial negative economic impact in urban and rural areas. Until now, the species has been mostly restricted to the Asian region; and no specimen has been captured or reported as a stowaway arriving to an America...
Article
The José María Arguedas’ grass mouse, Akodon josemariarguedasi , is currently known from the central Yungas of Peru, ranging from the right (south) side of the Río Huallaga in Huánuco Department (in the north) to Junín Department (in the south); its phylogenetic affinities are unknown. We collected four specimens from Quintao, Tayacaja, Huancavelic...
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Se estudia la dieta y la estructura trófica de 36 especies de murciélagos del Santuario Nacional Pampa Hermosa. Se analizaron muestras fecales y geles con polen. En las fecas se encontraron semillas, polen y restos de artrópodos. Los murciélagos se clasificaron en seis grupos funcionales. En la dieta de los frugívoros sedentarios (FS), frugívoros n...
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A pesar de la alta diversidad de mamíferos conocidos para el Perú, son pocos los estudios en las yungas centrales, lo que no permite un adecuado conocimiento de su diversidad. Aquí se da a conocer los resultados de una evaluación de la diversidad de mamíferos de Carpish, Huánuco, un bosque montano en estado crítico de conservación. El estudio se re...
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Landscape modification represents one of the most severe threats to biodiversity from local to global scales. Conversion of forest to agricultural production generally results in patches of habitat that subdivide or isolate populations, alter the behavior of species, modify interspecific interactions, reduce biodiversity, and compromise ecosystem p...
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The genus Neacomys includes 10 recognized species of Neotropical spiny mice in the tribe Oryzomyini. Five species have previously been reported from Peru, but the small-bodied Peruvian taxa remain unrevised. In this report, we present the first systematic and taxonomic revision of small-bodied Neacomys populations in Peru and describe two new speci...
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Platalina genovensium is one of the most endangered species of the subfamily Lonchophyllinae, currently known from a few localities on the western slopes of the Andes, and only 1 locality on the eastern side of the Peruvian Andes. Here, we report 9 new localities for this species, including 3 from the eastern slopes, which confirm the oriental dist...
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Background The southern Amazon Basin in the Madre de Dios region of Peru has undergone rapid deforestation and habitat disruption, leading to an unknown zoonotic risk to the growing communities in the area. Methodology/Principal findings We surveyed the prevalence of rodent-borne Leptospira and Bartonella, as well as potential environmental source...
Data
Analysis of microbial composition in samples from the environment relative to land disturbance. Abundance of bacteria that correlate with land disturbance in the (A) soil and (B) water. (TIF)
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Purús is a Peruvian Amazonian province with little information on its biodiversity, especially on small mammals. This work aims to document the bats diversity in the region by developing intensive inventories at the Río La Novia Conservation Concession, located on the right bank of the La Novia River, Purús, Ucayali Department. We surveyed the stud...
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Con la finalidad de brindar una herramienta para autoridades vinculadas a la lucha contra el tráfico ilegal de fauna silvestre se publicó la Guía de identificación de fauna silvestre para las autoridades ambientales de Amazonas, San Martín, Loreto y Ucayali (ISBN: 978-612-4261-24-4). Esta guía representa una herramienta importante por lo cual la in...
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Artibeus fraterculus Anthony, 1924 is a phyllostomid bat commonly called the fraternal fruit-eating bat. It is endemic to western Ecuador and north-central and western Peru. It prefers dry forests and arid zones where it can be very abundant, and it also is present in semideciduous and humid habitats, where it occurs less abundantly; it is an activ...
Article
Anoura is a Neotropical genus of long-tongued bats containing at least 10 species, whose taxonomy has been revised substantially in recent years. Herein, we describe a new species of Anoura from the Cordillera Oriental of the Peruvian Andes, inhabiting montane forests (Yungas) at 1900–3450 m altitude, along the Río Cosñipata valley in Manu Biospher...
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The phylogenetic position of the Ancash leaf-eared mouse Phyllotis definitus remains unresolved, as this species has been considered to be related to Phyllotis magister, Phyllotis xanthopygus or Phyllotis andium by several authors. The objective of this study was to clarify the phylogenetic position of P. definitus using 801 base pairs of cytochrom...
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Oecomys es un género moderadamente especioso de tamaño pequeño a mediano y coloración característica. Dentro del género, la especie O. bicolor es reconocida morfológicamente con relativa facilidad; sin embargo, se ha reportado variaciones individuales, en tamaño y color, de distintas poblaciones que sugieren la especie podría ser un complejo de esp...
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Tomopeas ravus, el murciélago de orejas romas, se conoce solo de 13 localidades confirmadas en Perú y actualmente se encuentra listada como En Peligro (B2 ab (iii)) por la UICN. La distribución, extensión de ocurrencia y el área de vida de esta especie no han sido esclarecidos completamente. Presentamos el primer modelo predictivo basado en los reg...
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The large spiny mouse Neacomys spinosus (Thomas, 1882) has been considered the widest ranging species of the genus, occurring in southern Colombia, eastern Peru, western Brazil and northern Bolivia. The morphological variation between subspecies and populations of N. spinosus has been noted; nonetheless, this variation has not been assessed in a mo...
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Species in the Order Carnivora are susceptible to habitat fragmentation, deforestation, and climate change because of their medium to large size, large spatial requirements, and other species-specific requirements , providing challenges to conservation and management. Understanding their distributions and occurrence in the face of these threats is...
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Species in the Order Carnivora are susceptible to habitat fragmentation, deforestation, and climate change because of their medium to large size, large spatial requirements, and other species-specific requirements, providing challenges to conservation and management. Understanding their distributions and occurrence in the face of these threats is c...
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RESUMEN. Eremoryzomys polius (Osgood 1913) es un roedor orizomyino endémico de la cuenca alta del río Marañón, Perú, del que solo se conocen 15 ejemplares procedentes de 7 localidades y que no había sido regis-trado en los últimos 22 años. En este trabajo se reportan 4 localidades nuevas para E. polius, que expanden la distribución de este roedor....
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Sturnira bakeri was recently described from southwestern Ecuador near the Peruvian border and was suggested to occur also in Peru. To confirm this hypothesis we present a morphological and morphometric revision of specimens of Sturnira collected from northwestern Peru. As result, we report the presence of S. bakeri from Peru and extend its distribu...
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The genus Akodon is one of the most abundant and species rich genus of Neotropical mammals. Its species level taxonomy has been changing actively since its establishment. Currently, the genus is divided into five groups of species: aerosus, boliviensis, cursor, dolores, and varius. Most taxonomic studies of the genus Akodon have focused on bolivien...
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El Santuario Nacional Pampa Hermosa (SNPH) es un área protegida importante debido a que protege los relictos de los bosques montanos de las Yungas centrales del Perú, donde los estudios de la diversidad de murciélagos son escasos. Nuestro objetivo fue documentar la diversidad y composición de los murciélagos del SNPH y compararlo con otros bosques...
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La Reserva de Biósfera del Noroeste (RBN) alberga por lo menos 22 especies de mamíferos medianos y grandes entre las cuales se encuentran los primates Alouatta palliata aequatorialis y Cebus albifrons aequatorialis. Los estimados previos de la densidad poblacional de A. p. aequatorialis varían de 2.3‒8.6 ind/km2 en 1983 a 17‒19 ind/km2 en 2005 y 20...
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Leucism is a genetic condition that manifest as the total or partial lack of coloration, as result of a deficiency in the melanin deposit in the skin and fur. We present the first occurrence of leucism in Glossophaga soricina valens from Peru, a nectarivorous species of the western slope of the Andes from Peru and Ecuador, and the Maranon valley. A...
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We examined quantity and quality components of primary seed dispersal for an assemblage of sigmodontine rodents in a high-elevation montane tropical forest in Peru. We collected faecal samples from 134 individuals belonging to seven rodent species from the subfamily Sigmodontinae (Cricetidae) over a 2-y period. We conducted seed viability tests for...
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The Ucayali department has a large mammal’s diversity with 38% of the recorded species for Peru, and is one of the less studied Amazonían areas therefore with big information gaps, especially at the lower basin of Purus river at the border with Brasil. We studied the diversity of non-flying small mammals at the Concesión para Conservación Río La No...
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The Ucayali region has a high diversity of mammals, with 38% of the total recorded for Peru; however, is also one of the less studied regions and one of the most threatened, mainly because of a high anthropic activity. At present, this region contains areas with large information gaps, one of them in Purús near the frontier with Brazil. We present...
Article
Eremoryzomys polius (Osgood 1913) is an oryzomyine rodent endemic to the upper basin of the Marañón River in Peru, known from only 15 specimens at 7 localities and with no new records in at least 22 years. Here we report an expansion of the geographic distribution of E. polius by confirming its presence at four new locations near the Marañón River....