Results 21 to 30 of about 6,507 (153)

Oldest ctenodactyloid tarsals from the Eocene of China and evolution of locomotor adaptations in early rodents

open access: yesBMC Evolutionary Biology, 2018
Background Tamquammys has been considered one of the basal ctenodactyloid rodents, which has been documented in the earliest to middle Eocene (~ 56.0–48.5 Ma) in China. It was the most abundant and widespread rodent genus in the Erlian Basin (Nei Mongol,
Łucja Fostowicz-Frelik   +2 more
doaj   +1 more source

New anatomical information of the wukongopterid Kunpengopterus sinensis Wang et al., 2010 based on a new specimen [PDF]

open access: yesPeerJ, 2017
The Wukongopteridae compose a non-pterodactyloid clade of pterosaurs that are the most abundant flying reptiles in the deposits of the Middle-Late Jurassic Yanliao Biota.
Xin Cheng   +3 more
doaj   +2 more sources

The first pterosaur basihyal, shedding light on the evolution and function of pterosaur hyoid apparatuses [PDF]

open access: yesPeerJ, 2020
The pterosaur is the first known vertebrate clade to achieve powered flight. Its hyoid apparatus shows a simplification similar to that of birds, although samples of the apparatus are rare, limiting the ability to make an accurate determination.
Shunxing Jiang   +3 more
doaj   +2 more sources

Human and Ape Molecular Clocks and Constraints on Paleontological Hypotheses [PDF]

open access: yesJournal of Heredity, 2001
Although the relationships of the living hominoid primates (humans and apes) are well known, the relationships of the fossil species, times of divergence of both living and fossil species, and the biogeographic history of hominoids are not well established.
R L, Stauffer   +4 more
openaire   +2 more sources

Intra-gastric phytoliths provide evidence for folivory in basal avialans of the Early Cretaceous Jehol Biota

open access: yesNature Communications, 2023
Angiosperms became the dominant plant group in early to middle Cretaceous terrestrial ecosystems, coincident with the timing of the earliest pulse of bird diversification.
Yan Wu   +6 more
doaj   +1 more source

An Oligocene giant rhino provides insights into Paraceratherium evolution

open access: yesCommunications Biology, 2021
Deng et al. report a new species of giant rhino, Paraceratherium linxiaense, from specimens of the upper Oligocene Jiaozigou Formation in China with an age of 26.5 Ma. Morphological analysis of the completely preserved skull with articulated mandible and
Tao Deng   +6 more
doaj   +1 more source

INEVITABLE HUMANS: SIMON CONWAY MORRIS'S EVOLUTIONARY PALEONTOLOGY [PDF]

open access: yesZygon: Journal of Religion and Science, 2005
Abstract. Simon Conway Morris, noted Cambridge University paleontologist, argues that in evolutionary natural history humans (or beings rather like humans) are an inevitable outcome of the developing speciating processes over millennia; humans are “inherent” in the system.
Rolston, Holmes, 1932-, author   +1 more
openaire   +3 more sources

A new toothless pterosaur from the Early Cretaceous Jehol Biota with comments on the Chaoyangopteridae

open access: yesScientific Reports, 2023
The Chaoyangopteridae is a clade of azhdarchoid pterosaurs that stands out in China, particularly in the Jehol Biota, as a Cretaceous group of medium-sized and high-crested pterosaurs. Herein, we describe a new species, Meilifeilong youhao gen.
Xiaolin Wang   +13 more
doaj   +1 more source

Bony-fish-like scales in a Silurian maxillate placoderm

open access: yesNature Communications, 2023
Major groups of jawed vertebrates exhibit contrasting conditions of dermal plates and scales. But the transition between these conditions remains unclear due to rare information on taxa occupying key phylogenetic positions.
Xindong Cui   +4 more
doaj   +1 more source

Morphology of an Early Oligocene beaver Propalaeocastor irtyshensis and the status of the genus Propalaeocastor [PDF]

open access: yesPeerJ, 2017
The Early to Late Oligocene Propalaeocastor is the earliest known beaver genus from Eurasia. Although many species of this genus have been described, these species are defined based on very fragmentary specimens.
Lüzhou Li   +3 more
doaj   +2 more sources

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