Results 41 to 50 of about 29,093 (188)

El aparato masticador del género extinto Actenomys Burmeister, 1888 (Rodentia, Ctenomyidae): inferencias sobre su modo de vida

Estudios Geologicos, 2000
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

Oldest well‐preserved euprimate petrosal, from the early Eocene of India (Vastan Lignite Mine, Gujarat)

The Anatomical Record, EarlyView.
Abstract An exquisitely preserved, isolated partial petrosal with associated fragmentary stapes is described from the Vastan Lignite Mine (Gujarat, India), dated to the early Eocene (~54.5 Ma). Several anatomical traits (e.g., large petrosal plate; posterolateral entry of the internal carotid artery to the tympanic cavity; bony tubes surrounding the ...
Mary T. Silcox, Kenneth D. Rose, Rachel H. Dunn, Kishor Kumar, Rajendra S. Rana, Ashok Sahni, Lachham Singh, Thierry Smith, Jordan W. Crowell   +8 more
wiley   +1 more source

Tipificación corológica de los micromamíferos ibéricos en relación con Europa y África

Graellsia, 2003
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, J. C. Guerrero, A. L. Márquez, J. Olivero, J. M. Vargas   +4 more
doaj   +1 more source

Tracing the evolutionary history of the morpho‐anatomy of baculum in primates

The Anatomical Record, EarlyView.
Abstract Animal morphology reflects both evolutionary history and present‐day adaptation. Male mammal copulatory structures such as the baculum (penile bone) are ideal for studying these processes because of their complexity and high interspecific variability. In primates, however, research has focused mostly on baculum length.
Federica Spani, Maria Pia Morigi, Matteo Bettuzzi, Monica Carosi   +3 more
wiley   +1 more source

The “costly son” hypothesis: Sons exacerbate obstetrical dilemmas in humans and other mammals

The Anatomical Record, EarlyView.
Abstract Human childbirth has often been considered uniquely difficult among mammals, yet recent evidence suggests that obstructed labor and fetopelvic disproportion are widespread across placental mammals. Here, we propose the “costly son” hypothesis: because male offspring are typically larger at birth, they impose greater obstetric risk on mothers ...
Nicole D. S. Grunstra, Jonathan C. K. Wells   +1 more
wiley   +1 more source

Evidence for parallel development of ever-growing molars in Early Pleistocene rodents from southern Spain and their paleoenvironmental implications

Acta Palaeontologica Polonica, 2023
In this paper, we present a detailed survey on the rodent fauna from the site of Barranco de los Conejos (Guadix-Baza Basin, southern Spain). Its rodent fauna is composed of three arvicolines (Orcemys giberti, Manchenomys oswaldoreigi, and Tibericola ...
JORDI AGUSTÍ , PEDRO PIÑERO
doaj   +1 more source

Cross‐Species Single‐Cell Comparative Analysis Reveals Gluconeogenic Features of Hepatocytes in Ruminants

Animal Research and One Health, EarlyView.
In this study, we used cross‐species comparisons to identify ruminant hepatocyte features. We also identified potential genes and TFs involved in coordinating gluconeogenesis in ruminant hepatocytes. By integrating single‐cell data with population genetic analyses, we further identified candidate genetic variation in glucose metabolism and ...
Yaqi Zhou, Wuqiang Huo, Yingran Liu, Yihang Liu, Fei Wang, Tao Shi, Yu Jiang   +6 more
wiley   +1 more source

What drives animal responses to high severity fire? The role of functional traits

Biological Reviews, EarlyView.
ABSTRACT Fire regimes are changing worldwide, with increases in the frequency, extent, and severity of fires posing growing risks to biodiversity. Fire severity – the degree of habitat alteration following fire – strongly influences both immediate survival and long‐term recovery of fauna.
Grace A. Vielleux, Trent D. Penman, Victoria A. Reynolds, Matthew H. Swan   +3 more
wiley   +1 more source

Species traits mediate terrestrial mammal density responses to human impacts

Ecography, EarlyView.
Human activities are reshaping ecosystems, but their effects on species population density remain poorly understood. Most studies focus on species presence–absence, thus limiting insight into how anthropogenic pressures affect population density. Emerging evidence suggests that responses of natural populations to human disturbance are highly variable ...
Luca Santini, Diana E. Bowler, Roberto Salguero‐Gómez, Inês S. Martins, Franziska Schrodt, Romain Frelat, Mickael Hedde, Naia Morueta‐Holme, Pierre Gaüzère, Cyrille Violle, Romain Goury, Joaquim Estopinan, Miriam Beck, Wilfried Thuiller   +13 more
wiley   +1 more source

Nuevos Pedetidae (Rodentia: Mammalia) del Mio-Plioceno de Africa

Estudios Geologicos, 2011
Los Pedetidae o liebres saltadoras están representados por un solo género actual (Pedetes) y 5 extintos (Parapedetes, Megapedetes, Propedetes, Rusigapedetes y Oldrichpedetes, estos dos últimos son nuevos).
M. Pickford, P. Mein
doaj   +1 more source