En el género Carollia, Carollia brevicauda y C. perspicillata son las especies más abundantes y ampliamente distribuidas del género en América del Sur, además de tener distribuciones casi complemente sobrepuestas. Debido a que estas especies son morfológicamente similares en algunas localidades son frecuentemente mal identificadas. El objetivo de este estudio fue determinar las diferencias morfológicas y morfométricas de C. brevicauda y C. perspicillata. para esto, se empleó un análisis morfológico detallado y diversos métodos estadísticos y multivariados. Se evaluaron 26 variables cráneo-dentales con distribución normal de 375 especímenes adultos entre ambas especies procedentes de poblaciones peruanas y ecuatorianas. Además, para efectos de comparación se incluyeron a 54 especímenes entre Carollia benkeithi, C. manu y Carollia sp. Se encontró que C. brevicauda y C. ...

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 study area in the wet and dry seasons of 2015 using mistnets set on the ground and canopy, achieving a total sampling effort of 725 NN (12-m mist nets/night). As result, we recorded 32 bat species that include four new records for Purus province, and two new records for the Ucayali department (Eumops cf. delticus and Molossops temminckii). The seasonal accumulation curves were adjusted to the Clench model; however, the asymptotes were not reached, suggesting that more fieldwork is needed. Non-surprisingly, Phyllostomidae was the most diverse fam...

La variación por edad y el dimorfismo sexual en murciélagos son aspectos frecuentemente estudiados; sin embargo, esta información no está disponible para Platalina genovensium, una especie de murciélago amenazado que habita ecosistemas secos entre Perú y Chile. En este estudio, se presentan los primeros datos sobre su caracterización en clases de edad y un análisis de dimorfismo sexual. Se analizaron 31 especímenes entre juveniles y adultos para evaluar la ontogenia. Luego, usando solo especímenes adultos se evaluó la presencia de dimorfismo sexual mediante análisis estadísticos y multivariados usando una variable externa y 14 cráneo-dentales. Como resultado, se presenta caracterizaciones de los estadíos juvenil (clase I) y adulto (clases IV y V), además del cráneo de un feto. Con respecto al dimorfismo sexual, se encontró que la longitud del antebrazo entre hembras y m...

In the bat genus Carollia, C. brevicauda and C. perspicillata are the most abundant and widely distributed in South America; also, their distributional ranges are almost completely overlapped. Because these species are morphologically very similar, they are frequently misidentified. The aims of this study were to determine the morphological and morphometric differences of C. brevicauda and C. perspicillata. For that reason, I employed a detail morphological assessment and several multivariate morphometric tools. I evaluated 26 normally craniodental variables in 375 adult specimens from Peruvian and Ecuadorian populations. In addition, 54 specimens of C. benkeithi, C. manu, and Carollia sp. were included for comparisons. I found that C. brevicauda and C. perspicillata are differentiated by 28 discrete characters, and are significantly different in 25 morphometric variables. Also, C. brevi...

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 study area in the wet and dry seasons of 2015 using mistnets set on the ground and canopy, achieving a total sampling effort of 725 NN (12-m mist nets/night). As result, we recorded 32 bat species that include four new records for Purus province, and two new records for the Ucayali department (Eumops cf. delticus and Molossops temminckii). The seasonal accumulation curves were adjusted to the Clench model; however, the asymptotes were not reached, suggesting that more fieldwork is needed. Non-surprisingly, Phyllostomidae was the most diverse fam...

Ontogenetic development and sexual dimorphism in bats are aspects frequently studied; however, this information is not available for Platalina genovensium, a threatened bat species that occurs in dry ecosystems between Peru and Chile. In this study, I present the first information about the ontogeny and sexual dimorphism of the species based on the review of collection specimens. I analyzed 31 specimens including juveniles and adults to assess ontogeny. Sexual dimorphism was tested by statistical and multivariate analysis using one external and 14 cranio-dental variables on adults only. Descriptions of juvenile (age class I) and adult stages (age classes IV and V) are presented, as well as the skull of a fetus. I found that the forearm length did not present statistically supported differences between sexes, whereas at the cranial-dental level, the mandibular branch width was the main di...

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 morphology that differ from any other known species of Thomasomys. It is also one of the largest species of Thomasomys, exceeded in size only by T. apeco. A phylogenetic analysis using sequences of Cytb recovered this species within a non-monophyletic "aureus" group with a genetic distance between 5.47% (with T. auricularis) to 10.17% (with Thomasomys sp. 1). In addition to this finding, the phylogenetic position of T. apeco, T. praetor, and T. pyrrhonotus are presented for the first time, prompting a discussion on the nature of the "aureus" group.

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 información transmitida debe ser lo más actual y fidedigna posible. Sin embargo, después de revisar la sección dedicada a mamíferos, identificamos diversos errores que podrían generar confusión y ser contraproducentes en la lucha contra el tráfico ilegal de vida silvestre. Aunque resaltamos la importancia de este trabajo, sugerimos precaución en la elaboración de documentos como esta guía con la finalidad de maximizar su utilidad para las autoridades que combaten tráfico de fauna en nuestro territorio.

The Guía de identificación de fauna silvestre para las autoridades ambientales de Amazonas, San Martín, Loreto y Ucayali (ISBN: 978-612-4261-24-4) was published in order to provide a tool for authorities related to the fight against wildlife trafficking and trade.This guide represents an important tool, so the information transmitted should be as current and reliable as possible. However, after reviewing the section dedicated to mammals, we identified several errors that could generate confusion and be counterproductive in the fight against wildlife trafficking. Although we emphasize the importance of this work, we suggest caution in the preparation of documents such as this guide in order to maximize its usefulness for the authorities that fight wildlife trafficking in our territory.

The most recent list of mammals in Peru, published in 2020, compiled a total of 569 species, including 82 endemic species. However, several taxonomic changes have occurred in this short time, and it makes necessary to publish an updated list of all mammalian species recorded in Peru. This new list is updated until November 2021 and includes 573 species, 223 genera, 51 families and 13 orders: Didelphimorphia (47), Paucituberculata (2), Sirenia (1), Cingulata (5), Pilosa (7), Primates (42), Lagomorpha (2), Eulipotyphla (3), Carnivora (33), Perissodactyla (2), Artiodactyla (46, including 32 cetaceans), Rodentia (194) and Chiroptera (189); of which 87 species are endemic to the country. On the other hand, the need to have valid and updated taxonomic lists for use in decision-making, leads us to propose as an optimal strategy that the Asociación de Mastozoólogos del Perú (AMP) assume the r...

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 information, we conducted an exhaustive review of the scientific literature and specimens in scientific collections, consulting with specialists when needed to verify records. We report 191 species belonging to the orders Didelphimorphia (46 spp.), Paucituberculata (2), Sirenia (1), Cingulata (5), Pilosa (8), Primates (42), Lagomorpha (2), Eulipotyphla (3), Carnivora (33), Perissodactyla (2), and Artiodactyla (47, including 32 cetaceans); 22 of these are endemic to Peru. Due to their high diversity and number of taxonomic changes, the Orders Chiropte...

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 information, we conducted an exhaustive review of the scientific literature and specimens in scientific collections, consulting with specialists when needed to verify records. We report 191 species belonging to the orders Didelphimorphia (46 spp.), Paucituberculata (2), Sirenia (1), Cingulata (5), Pilosa (8), Primates (42), Lagomorpha (2), Eulipotyphla (3), Carnivora (33), Perissodactyla (2), and Artiodactyla (47, including 32 cetaceans); 22 of these are endemic to Peru. Due to their high diversity and number of taxonomic changes, the Orders Chiropte...