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1

Notably range extension of Sturnira aratathomasi Peterson and Tamsitt 1969 in Peru

100%
Pacheco V., Hocking P.
Acta Chiropterologica
|
2006
|
tom 08
|
nr 2
2

A new species of Anoura Gray, 1838 (Chiroptera: Phyllostomidae) from Peru, with taxonomic and biogeographic comments on species of the Anoura caudifer complex

81%
Pacheco V., Sanchez-Vendizu P., Solari S.
Acta Chiropterologica
|
2018
|
tom 20
|
nr 1
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 Biosphere Reserve, Cuzco; where it is sympatric with A. peruana, A. cultrata, and A. caudifer. This new species is most similar to A. caudifer and A. aequatoris, but it is distinguished from them by a unique combination of morphological characters: pelage dark; uropatagium narrow with margins densely furred; foot claws whitish; skull with a long and narrow rostrum; zygomatic arches complete and straight (in lateral view); posterolateral margins of palate without processes; braincase smoothly rounded; first upper premolar (P2) peg-like and separated from the upper canine by a wide gap; second upper premolar (P3) without anterobasal cusp; mandible long, straight, thin and delicate with a large symphysis. Principal Component Analysis separated well the new species from A. aequatoris and A. caudifer. In MANOVA analyses, followed by Bonferroni post-hoc test, the new species differed significantly from A. aequatoris and A. caudifer in six and 11 characters, respectively. The new species and A. aequatoris have montane distributions, whereas A. caudifer occurs at lower elevations. In Peru, the new species and A. aequatoris show disjunct distributions: the former in the central and southern regions, and the latter in the north-central region of the country. This suggests a vicariant effect probably related to the deep Río Apurímac. Finally, we comment on the taxonomy of the A. caudifer complex, discuss the biogeographical implications of the discovery of the new species, and suggest the recognition of a new region of endemism for small mammals in the southern Yungas, south of the Río Apurímac to Bolivia.
3

Sexual size dimorphism of a sensory structure in a monomorphic bat

81%
Hurtado N., Sepulveda R. D., Pacheco V.
Acta Chiropterologica
|
2015
|
tom 17
|
nr 1
As a strategy to reserve energy for parental care, females are larger than males in most bat species. Although females are responsible for providing parental care in almost all (if not all) bats, there are some species in which the males are larger than the females, and in other species the sexes are similarly sized. It has been proposed that for non dimorphic bat species, some foraging traits might be responsible for the differences observed between the sexes, though, this hypothesis has not been tested formally. Here, we evaluate the sexual size dimorphism of the phyllostomid insectivorous bat Gardnerycteris crenulatum using the morphometric variables of body size and nose-leaf size; the latter is a functional structure that plays an important role in echolocation and determines insectivorous bats‘ effectiveness in foraging. Our results show that G. crenulatum is a sexually monomorphic species in terms of body size, but it is dimorphic in nose-leaf traits. Females exhibit larger nose-leaves than males, which could increase the directionality of their ultrasound emission and hence improve the females‘ ability to obtain sensory information. We propose that monomorphic bats could be dimorphic for functional structures related to foraging behaviour as a means to increase their energetic effectiveness.
4

Noteworthy bat records from the Pacific Tropical rainforest region and adjacent dry forest in northwestern Peru

71%
Pacheco V., Cadenillas R., Velazco S., Salas E., Fajardo U.
Acta Chiropterologica
|
2007
|
tom 09
|
nr 2
The bat fauna of the Pacific Tropical rainforest region in Peru is poorly known. Here we report noteworthy range extensions of 12 bat species, including: Diaemus youngi, Chrotopterus auritus, Micronycteris minuta, Mimon crenulatum, Vampyrum spectrum, Chiroderma salvini, Enchisthenes hartii, Noctilio leporinus, Thyroptera discifera, Eptesicus chiriquinus, Rhogeessa io, and Myotis riparius. These document the first confirmed records for the department of Tumbes. All, except E. hartii and N. leporinus, are also first records for the western slope of Peru. The record of R. io is the first for Peru, while that of C. auritus is the first for the Pacific versant of the Andes. In total, 41 bat species are present in the Pacific Tropical rainforests and surrounding dry forests, at the new Parque Nacional Cerros de Amotape, in Tumbes. This region requires urgent conservation programs, because the Pacific Tropical rainforest is threatened by human settlement, and resource exploitation in spite of its protected status.
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