Results 111 to 120 of about 52,671 (260)
El nuevo yacimiento de Gorafe-A, situado en el sector occidental de la depresión de Guadix-Baza, ha proporcionado la siguiente fauna de micromamíferos: Stephanomys aff. medius, Apodemus gorafensis nov. sp., Paraethomys cf.
A. Ruiz Bustos+4 more
doaj +1 more source
What Are the Phylogenetic Limits to Pollinator Diversity?
ABSTRACT Although huge progress has been made over the past 200 years in identifying the diversity of pollinators of angiosperms and other plants, new discoveries continue to be made each year, especially in tropical areas and in the fossil record. In this perspective article I address the following questions: Just how diverse are the pollinators and ...
Jeff Ollerton
wiley +1 more source
Functional evolution of the feeding system in rodents [PDF]
The masticatory musculature of rodents has evolved to enable both gnawing at the incisors and chewing at the molars. In particular, the masseter muscle is highly specialised, having extended anteriorly to originate from the rostrum.
Cox, Philip G.+7 more
core +1 more source
Se describe la anatomía cráneo-dentaria del género Actenomys, registrado en sedimentos del Plioceno de la provincia de Buenos Aires (República Argentina), con especial énfasis los puntos de origen e inserción de la musculatura masticatoria; se lo compara
L. J. M. de Santis, G. J. Moreira
doaj +1 more source
Published as part of Arnal, Michelle & Pérez, María E., 2013, A new acaremyid rodent (Hystricognathi: Octodontoidea) from the middle Miocene of Patagonia (South America) and considerations on the early evolution of Octodontoidea, pp.
Arnal, Michelle, Pérez, María E.
openaire +2 more sources
Bats are unique among mammals for evolving powered flight. However, very little data are available on the muscle properties and architecture of bat flight muscles. Using diceCT and gross dissection, we show that the Egyptian fruit bat pectoralis is optimised for power, and the elbow flexion/extension group is optimised for high forces with large PCSA ...
Roger W. P. Kissane+2 more
wiley +1 more source
Phylogeographic Structure of the Fossorial Long-Clawed Mouse Chelemys macronyx (Cricetidae: Sigmodontinae) [PDF]
We present a phylogeographic study of the fossorial sigmodontine mouse Chelemys macronyx. Analyses were based on mitochondrial DNA sequences of specimens collected over most of distributional range of the species. Results showed that C.
Alarcón, Oriet+3 more
core
Tipificación corológica de los micromamíferos ibéricos en relación con Europa y África
En el presente artículo se analizan los diferentes tipos de distribución, o corotipos, que pudieran existir para las 70 especies de micromamíferos que se distribuyen por los 12 sistemas montañosos que circundan la parte más occidental de la cuenca ...
R. Real+4 more
doaj +1 more source
Semicircular canal morphology in Rodentia and its relationship to locomotion
Here, we present a selection of rodent inner ear 3D models in the lateral view, with rodents from seven locomotor categories (left to right: fossorial, semifossorial, semiaquatic, terrestrial, ricochetal, arboreal, and gliding). Semicircular canal (SCC) morphology, including radius of curvature and shape, can be differentiated between specialized forms
Lily Hou+4 more
wiley +1 more source
Prolactin is a strong candidate for the regulation of luteal steroidogenesis in vizcachas (Lagostomus maximus) [PDF]
Prolactin (PRL) is essential for the maintenance of the corpora lutea and the production of progesterone (P4) during gestation of mice and rats, which makes it a key factor for their successful reproduction.
Charif, Santiago Elías+10 more
core +1 more source