Una nUeva especie de MUsaraña del género Cryptotis poMel 1848 (MaMMalia: soricoMorpha: soricidae) de ecUador y estatUs taxonoMico de Cryptotis equatoris thoMas (1912) pablo a. Moreno cárdenas 1,2 lUis albUja v.
We describe a new species of climbing rat of the genus Rhipidomys based on cranial and external morphology, morphometrics, and phylogenetic analyses of cytochrome b gene. This taxon was compared with species of Rhipidomys present in Ecuador, principally R. latimanus, which is a closely related species based on molecular analysis, and with several species from Colombia and Peru. The new species is easily distinguished from congeneric species by the relatively small size of its body (average head-body length 123 mm) and its distinctive cranial morphology including: Interorbital region constricted; postorbital crest almost imperceptible in females and evident only slightly in males; braincase wide and round; nasals narrow in their posterior and gradually expand forward; anteromedian flexus is well defined and deep; m3 with hypoflexid large and deep; mesopterygoid fossa extends beyond the third molar and capsular process on mandible well developed, forming an evident projection. The new species is only known from the southeastern portion of Sangay National Park in Ecuador and is therefore likely endemic to the Cordillera Oriental of Ecuador. We also provide natural history and reproductive observations, vocalization analysis, habitat preference, and phylogenetic placement of this species.
The Andean forests of southwestern Ecuador and northern Peru, hold a unique assemblage of species, given the existence of high habitat diversity. Our aim is to characterize the small mammal diversity at Yacuri National Park in southern Ecuador. We collected small non-volant mammals, using Sherman, Pitfall, and Tomahawk traps, in wet and dry habitats in the Yacuri National Park; and obtained some specimens of rodents and marsupials in the pluviseasonal forest in southern Ecuador. We registered several non-volant small mammal species, including the first Ecuadorian record of the olive-gray mouse (Thomasomys cinereus). This record expands the known species distribution, 10 km from the northernmost location in Peru within the same ecosystems.Los bosques de los Andes del suroccidente de Ecuador y norte de Perú, comparten una diversidad única en especies de mamíferos, debido a la amplia diversidad de hábitats. Este estudio tuvo el objeto de conocer más acerca de los pequeños mamíferos del Parque Nacional Yacuri, para lo que se aplicaron métodos de captura de pequeños roedores y marsupiales en los bosques pluviestacionales del sur del Ecuador. Se registraron algunas especies de marsupiales, ratones marsupiales y roedores, entre los cuales una especie de roedor que resultó ser un nuevo registro del ratón gris oliváceo (Thomasomys cinereus) para Ecuador, el cual representa una extensión de 10 kilómetros de su distribución al norte de Perú, habitando los mismos ecosistemas peruanos en Ecuador.
The Puma concolor is one of the largest carnivores present in Chile, although its size varies according to the geographical area in which it is found. It is increasingly common to find them outside their habitat and more in our environment. Its ecology, reproduction and nutritional aspects are known, but very little about its anatomy, which creates a challenge in the veterinary morphological area that needs strengthening.
The present study consisted of an anatomical description of the skull of five adult specimens of Puma concolor (2 female and 3 male) in the veterinary anatomy laboratory of the Santo Tomás University, of the Puerto Montt headquarters and the Austral University of Valdivia headquarters. , which allowed a detailed study on the bone conformation of each structure present in the skull of these specimens. This allowed us to achieve results of morphological interests and deepening in the anatomy of this species.
Leucism is a hypopigmentary decrease of skin or fur coat, which is presented throughout the body or as isolated whitish patches on different parts of the body "piebald"; without altering the pigmentation of the eyes, lips, blood vessels or harm to the immune system of the specimen. The specimen was identified in the Tababela plateau located in the inter-Andean valley of Pichincha, Ecuador, site of the new Quito airport. By using glue traps used to capture lizards, one individual of Reithrodontomys mexicanus soederstroemi showing leucism, was trapped in the wild. This individual presents an irregular distribution of melanin pigments throughout it's body. This is the first case reported with leucism in nature for this endemic species of the inter-Andean xeric valleys near Quito.
During a faunal survey in the foothills of the Ecuadoran Andes southwest of the Cordillera del Cóndor, a mouse of uncertain affinities was taken in a fishing net. Various external characters suggested that it was a member of the genus Rhagomys, previously unrecorded in Ecuador. Comparisons with the external, cranial, and dental morphology both of Rhagomys rufescens and R. longilingua identified a number of unique characters, including its long, narrow rostrum and incisive foramina and the reduced anterolingual conule on its M1 procingulum. We describe the mouse as a new species of Rhagomys; both its morphology and molecular analyses suggest that it is sister to R. longilingua. This record of Rhagomys in southern Ecuador extends the known distribution of the genus 700 km northward and adds yet another genus and species to Ecuador’s extensive list of rodent species.
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