Papers by Edgardo M. Rengifo
The phylogenetic position of the Ancash leaf-eared mouse Phyllotis definitus remains unresolved, ... more The phylogenetic position of the Ancash leaf-eared mouse Phyllotis definitus remains unresolved, as this species has been considered to be related to Phyllo-tis 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 cytochrome b sequences. A matrix constituted by 43 specimens was subjected to maximum likelihood, maximum parsimony and Bayesian inference analyses. Our results indicate that P. definitus is a member of the " andium/amicus " group and is closely related to Phyllotis pearsoni, supporting a set of chromosomal and morphological characters previously identified for this group.
The Andean Leaf-eared mouse, Phyllotis andium Thomas 1912, has been considered a widespread mediu... more The Andean Leaf-eared mouse, Phyllotis andium Thomas 1912, has been considered a widespread medium-size sigmodontine
rodent (230 mm of total length and 35 grams approximately) that occurs from Tungurahua, Ecuador, through the
Andes, to Lima, Peru. Previous studies performed on Phyllotis noted evidence of morphological geographical variation
within the species, which is likely because of the several potential geographical barriers that exist within the distribution
range of P. andium. We carried out a taxonomic revision of this species based on qualitative and quantitative morphological
analyses of 330 specimens from 92 localities. This included appropriate comparisons with other species of the andium/
amicus group and performed molecular analysis based on cytochrome b sequences. As a result, morphologic qualitative
analysis suggested the recognition of three different taxa, which are supported by morphologic quantitative and molecular
analyses. The three taxa here identified have allopatric distributional ranges separated by important geographic barriers.
Following these identification criteria, P. andium is now recognized for the samples from Tungurahua, Ecuador to Huá-
nuco, Peru, and includes melanius and fruticicolus as synonymous; the southern populations from the Ancash and Lima
departments, in the western Peruvian Andes, are proposed to represent a new species; and we recognize P. stenops as a
valid species with tamborum as a synonym. Finally, we postulate that the diversification of these three species is related
to key events in the Andean orogeny
Herein we document the first case of albinism in Black Mastiff bat Molossus rufus É. Geoffroy St.... more Herein we document the first case of albinism in Black Mastiff bat Molossus rufus É. Geoffroy St.-Hilaire, 1805. The specimen was collected in Iquitos City (Northwestern Peru); it was an adult male with ventral and dorsal white pelage, red eyes, and depigmented wing membranes, nose leafs and ears.
KEY WORDS: yungas, montane forest, alpha and beta diversity, conservation, pipeline, small mammals.
We evaluated rodent populations in the montane forest of Chiquintirca, focusing on Thomasomys and... more We evaluated rodent populations in the montane forest of Chiquintirca, focusing on Thomasomys and Akodon species, both poorly known and highly threatened Andean genera found in the area of influence of the PERU LNG pipeline. We determined species abundance in impacted and nonimpacted areas along the pipeline in two sampling seasons. To estimate population and demographic parameters, we used noninvasive techniques such as the capturemark-recapture method using the Schnabel and Jolly-Seber models. We calculated Pucek's capture index to determine if results were method dependent. Our results showed that the abundance of rodent populations does not vary seasonally, except for Akodon torques. Seasonal differences in abundance of A. torques seem to be related to differences in foliar density in impact plots. Akodon torques, a terrestrial species, may be more sensitive to disturbances (pipeline construction) respective to other rodent species. No seasonal differences in population abundance were found in any of the other species studied. We found members of the genus Thomasomys more often in traps placed on tree branches than on the ground, which is consistent with arboreal species. Thomasomys aureus was captured 61% of the time in trees in nonimpacted plots. Thomasomys aureus is a good climber and establishes its nests in tree branches, which may also explain its prevalence in less disturbed (nonimpacted) areas. Thomasomys kalinowskii was one of the least abundant species, although it is locally abundant in other montane forests. This study is the first to estimate population abundance of rodent species in montane forests, contributing to better knowledge of the species and the endangered montane ecosystem. In doing so, we highlight the importance of rodents as indicators of habitat disturbances. Future monitoring programs on rodent species will determine if the pipeline is a barrier and how the abundance of rodent populations may vary as the pipeline right of way is restored. KEY WORDS: Thomasomys oreas, T. aureus, T. kalinowskii, montane forest, Jolly-Seber model, Pucek model, Schnabbel model, rodent populations. Alonso_5th-rev-proof.indb 101 8/5/13 12:53 PM
Roost characteristics for some bat species of the Itaya river headwaters, Loreto, Peru. This stud... more Roost characteristics for some bat species of the Itaya river headwaters, Loreto, Peru. This study presents information about bat roosts and their users in the Itaya River headwater, approximately 80km Southwest of Iquitos City (Northeastern Peru). This study was made from May to October of 2008. We established four sampling localities which were evaluated through intensive searches of potential roosts in line transects. The sampling effort covered 98km and we recorded 21 roosts corresponding to six types. The most common roost type was the tree cavity (n=12), followed by bark (n=5), furled leaf (n=1), termite nest (n=1), tent (n=1) and eroded dirt (n=1): this last type is described here for the first time. We identified 14 species representing 12 genera and 4 families (Phyllostomidae, Thyropteridae, Furipteridae and Emballonuridae). Roosts had 1-3 species, but most harbored only one. Phyllostomidae (except Choeroniscus minor), Thyropteridae and Furipteridae used protected sites such as tree cavities, termite nests, furled leaves and tents, while Emballonuridae were often found in exposed sites.
Diversidad de mamíferos y sus preferencias por los tipos de hábitats en la cuenca del río Alto It... more Diversidad de mamíferos y sus preferencias por los tipos de hábitats en la cuenca del río Alto Itaya Rev. peru. biol. 19(1): 035 -042 (April 2012) Rev. peru. biol. 19(1): 035 -042 (Abril 2012)
Platyrrhinus ismaeli is reported for the first time in the department of Ancash, Peru, becoming t... more Platyrrhinus ismaeli is reported for the first time in the department of Ancash, Peru, becoming the sourthermost record from the western slope of the Peruvian Andes. We discuss the lateral folds in the pinna as a valid diagnostic character for P. ismaeli, suggesting this character does not discriminate P. ismaeli from other species; and present an updated distribution map for the species.
Thesis Chapters by Edgardo M. Rengifo
Análisis taxonómico del ratón orejón andino phyllotis andium Thomas 1912 (rodentia: cricetidae)" ... more Análisis taxonómico del ratón orejón andino phyllotis andium Thomas 1912 (rodentia: cricetidae)" TESIS Para optar el Grado Académico de Magister en Zoologìa con mención en Sisematica y Evolución AUTOR Edgardo Manuel Rengifo Vásquez Lima -Perú 2014 ii AGRADECIMIENTOS A mis padres, Nelly Vásquez y Francisco Rengifo y a mis hermanos Wendy, Francisco y Gerald, por estar siempre en cada meta que me propongo. A Natali Hurtado por su constante apoyo tanto en lo académico como en lo personal. Al Dr. Víctor Pacheco por su asesoramiento tan detallado y su paciencia para el desarrollo del trabajo. A mis amigos del Museo de Historia Natural de la Universidad Mayor de San Marcos por compartir sus conocimientos y su tiempo. A Los curadores de los Museos Norteamericanos por permitir la revisión de especímenes, especialmente a J.L. Patton del Museum of Vertebrate Zoology (MVZ) una muy noble persona que fue clave para la financiación del viaje a Berkeley, California, US; a Bruce Patterson del Field Museum of Natural History (FMNH) por el préstamo y envío las muestras de Amazonas y Ecuador, a Robert Voss del American Museum of Natural History (AMNH), por permitir revisar muestras Ecuatorianas, a Paul M. Velazco por brindarme hospedaje durante mi estadía en New York.
A mi familia, en especial a mis padres, Juan Carlos y Esperanza, quienes me enseñaron a valorar m... more A mi familia, en especial a mis padres, Juan Carlos y Esperanza, quienes me enseñaron a valorar mi esfuerzo y dedicación en cada etapa de mi carrera profesional brindándome su confianza, apoyo y comprensión. A mis hermanas Kathlen y Karla. A mi mamá Nelly y mi papá Francisco, por su confianza y a mis hermanos Gerald, Francis y Wendy por su apoyo moral durante el estudio de mi carrera.
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Papers by Edgardo M. Rengifo
rodent (230 mm of total length and 35 grams approximately) that occurs from Tungurahua, Ecuador, through the
Andes, to Lima, Peru. Previous studies performed on Phyllotis noted evidence of morphological geographical variation
within the species, which is likely because of the several potential geographical barriers that exist within the distribution
range of P. andium. We carried out a taxonomic revision of this species based on qualitative and quantitative morphological
analyses of 330 specimens from 92 localities. This included appropriate comparisons with other species of the andium/
amicus group and performed molecular analysis based on cytochrome b sequences. As a result, morphologic qualitative
analysis suggested the recognition of three different taxa, which are supported by morphologic quantitative and molecular
analyses. The three taxa here identified have allopatric distributional ranges separated by important geographic barriers.
Following these identification criteria, P. andium is now recognized for the samples from Tungurahua, Ecuador to Huá-
nuco, Peru, and includes melanius and fruticicolus as synonymous; the southern populations from the Ancash and Lima
departments, in the western Peruvian Andes, are proposed to represent a new species; and we recognize P. stenops as a
valid species with tamborum as a synonym. Finally, we postulate that the diversification of these three species is related
to key events in the Andean orogeny
Thesis Chapters by Edgardo M. Rengifo
rodent (230 mm of total length and 35 grams approximately) that occurs from Tungurahua, Ecuador, through the
Andes, to Lima, Peru. Previous studies performed on Phyllotis noted evidence of morphological geographical variation
within the species, which is likely because of the several potential geographical barriers that exist within the distribution
range of P. andium. We carried out a taxonomic revision of this species based on qualitative and quantitative morphological
analyses of 330 specimens from 92 localities. This included appropriate comparisons with other species of the andium/
amicus group and performed molecular analysis based on cytochrome b sequences. As a result, morphologic qualitative
analysis suggested the recognition of three different taxa, which are supported by morphologic quantitative and molecular
analyses. The three taxa here identified have allopatric distributional ranges separated by important geographic barriers.
Following these identification criteria, P. andium is now recognized for the samples from Tungurahua, Ecuador to Huá-
nuco, Peru, and includes melanius and fruticicolus as synonymous; the southern populations from the Ancash and Lima
departments, in the western Peruvian Andes, are proposed to represent a new species; and we recognize P. stenops as a
valid species with tamborum as a synonym. Finally, we postulate that the diversification of these three species is related
to key events in the Andean orogeny