Results 1 to 10 of about 9,289 (259)

The Evolution of Equid Monodactyly: A Review Including a New Hypothesis

Frontiers in Ecology and Evolution, 2019
The traditional story of horse evolution is well-known: over time, horses became larger, they attained higher-crowned teeth, and they changed from having three toes (tridactyly) to a single toe (monodactyly). Evolution is often perceived as a progression
Christine M. Janis, Christine M. Janis, Raymond L. Bernor   +2 more
doaj   +1 more source

A Problem in Paleobiology

, 2002
We present a stochastic model for the size of a taxon in paleobiology, in which we allow for the evolution of new taxon members, and both individual and catastrophic extinction events. The model uses ideas from the theory of birth and death processes.
Hughes, Barry D., Reed, William J.
openaire   +2 more sources

Charcoal evidence traces diverse fungal metabolic strategies to the Late Paleozoic

iScience
Summary: Wood decomposition through fungal activity is essential to the natural carbon cycle. There are three primary patterns of wood decay: white rot, brown rot, and soft rot. However, geological records of wood decay mainly originate from fossil woods,
Yaofeng Cai, Hua Zhang, Biao Pan
doaj   +1 more source

Editorial: A fossil view of insect evolution: integrating paleontological evidence to explore the origins of insect biodiversity

Frontiers in Earth Science, 2023
Erik Tihelka, Chenyang Cai
doaj   +1 more source

Editorial: Permian Extinctions

Frontiers in Earth Science, 2021
Robert A. Gastaldo, Yukio Isozaki, Evelyn Kustatscher, Robert Reisz, ShuZhong Shen   +4 more
doaj   +1 more source

On the squamation of Australerpeton cosgriffi Barberena, a temnospondyl amphibian from the Upper Permian of Brazil

Anais da Academia Brasileira de Ciências, 2002
Abdominal scales of a juvenile specimen of Australerpeton cosgriffi Barberena 1998 are made of primary compact bone rich in osteocyte lacunae; vascular canals and primary osteons are rare with no sign of remodelling of the tissue by resorption and ...
DIAS ELISEU V., RICHTER MARTHA
doaj  

Dinosaur skull geometry does not follow functional optimization trends but facilitates adaptability

iScience
Summary: Dinosaurs exhibited a remarkable array of skull shapes and sizes. However, the geometry of the cranial skeleton and its different functional units (rostrum, orbital region, and braincase) has not been quantified biomechanically.
Stephan Lautenschlager, Minnie M. Cione, Grace Cowley, Benjamin J. Creasy, Harrison Everard, Oliver J. Graves, Poppy E. Hawkins, Alisa Plaksina, Helena N. Rowlstone, Austin M. Smith, Lauren M. Steward   +10 more
doaj   +1 more source

Evolutionary macroecology

Frontiers of Biogeography, 2013
Macroecology focuses on ecological questions at broad spatial and temporal scales, providing a statistical description of patterns in species abundance, distribution and diversity.
José Alexandre F. Diniz-Filho, Sidney F. Gouveia, Matheus S. Lima-Ribeiro   +2 more
doaj  

Climate and cultural evolution drove Holocene cropland change in the Huai River Valley, China

iScience
Summary: As an important way of maximizing land productivity by growing more than one crop type in the same field, mixed cropping has been an effective option for sustaining population growth under different climatic conditions since prehistoric period ...
Yanyan Yu, Haibin Wu, Wenchao Zhang, Nicole Boivin, Jie Yu, Juzhong Zhang, Xin Zhou, Wuhong Luo, Chenglong Deng, Junyi Ge, Zhengtang Guo   +10 more
doaj   +1 more source

New evidence for the earliest ornithischian dinosaurs from Asia

iScience
Summary: The Early Jurassic ornithischian dinosaurs in Laurasia are dominated by armored dinosaurs, with other early ornithischian groups being rare. Here, a new taxon, Archaeocursor asiaticus gen. et sp.
Xi Yao, Qi Zhao, Tingcong Ren, Guangbiao Wei, Xing Xu   +4 more
doaj   +1 more source