نتایج جستجو برای: miocene

تعداد نتایج: 6531  

2016
Mónica Nova Delgado Jordi Galbany Alejandro Pérez-Pérez

The phylogenetic position of many fossil platyrrhines with respect to extant ones is not yet clear. Two main hypotheses have been proposed: the layered or successive radiations hypothesis suggests that Patagonian fossils are Middle Miocene stem platyrrhines lacking modern descendants, whereas the long lineage hypothesis argues for an evolutionary continuity of all fossil platyrrhines with the e...

2016
Peter W. trusler alana C. sharP

Trusler, P.W. and Sharp, A.C. 2016. Description of new cranial material of Propalorchestes (Marsupialia: Palorchestidae) from the Middle Miocene Camfield Beds, Northern Territory, Australia. Memoirs of Museum Victoria 74: 291–324. Additional material referable to Propalorchestes novaculacephalus from the middle Miocene Camfield Beds is described. A cranium prepared in 1999-2000 from material co...

2016
Peng Zhang Hong Ao Mark J. Dekkers Yongxiang Li Zhisheng An

A large number of terrestrial mammalian fossils were reported in the well-exposed Paleogene and Neogene fluvio-lacustrine strata in Western China. Their accurate ages are crucial to understand the mammalian and environmental evolution associated with the step-wise uplift of the Tibetan Plateau. At present their ages are surprisingly poorly constrained. Here, we present a high-resolution magneto...

Journal: :Molecular phylogenetics and evolution 2001
D W Weisrock J R Macey I H Ugurtas A Larson T J Papenfuss

Phylogenetic relationships among salamandrids of the "true" salamander clade are investigated using 2019 aligned base positions (713 parsimony informative) of 20 mitochondrial DNA sequences from the genes encoding ND1 (subunit one of NADH dehydrogenase), tRNA(Ile), tRNA(Gln), tRNA(Met), ND2, tRNA(Trp), tRNA(Ala), tRNA(Asn), tRNA(Cys), tRNA(Tyr), and COI (subunit I of cytochrome c oxidase), plus...

Journal: :Molecular phylogenetics and evolution 2014
Xiang-Qin Yu Masayuki Maki Bryan T Drew Alan J Paton Hsi-Wen Li Jian-Li Zhao John G Conran Jie Li

Rapid organismal radiations occurring on the Qinghai-Tibetan Plateau (QTP) and the mechanisms underlying Asia-Africa intercontinental disjunctions have both attracted much attention from evolutionary biologists. Here we use the genus Isodon (Lamiaceae), a primarily East Asian lineage with disjunct species in central and southern Africa, as a case study to shed light upon these processes. The mo...

2006
MANUEL A. ITURRALDE-VINENT

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Journal: :Proceedings. Biological sciences 2012
Timothy M Ryan Mary T Silcox Alan Walker Xianyun Mao David R Begun Brenda R Benefit Philip D Gingerich Meike Köhler László Kordos Monte L McCrossin Salvador Moyà-Solà William J Sanders Erik R Seiffert Elwyn Simons Iyad S Zalmout Fred Spoor

Our understanding of locomotor evolution in anthropoid primates has been limited to those taxa for which good postcranial fossil material and appropriate modern analogues are available. We report the results of an analysis of semicircular canal size variation in 16 fossil anthropoid species dating from the Late Eocene to the Late Miocene, and use these data to reconstruct evolutionary changes i...

2013
T. Denk G. W. Grimm

Shallowing of the Panama Sill and the closure of the Central American Seaway initiated the modern Loop Current–Gulf Stream circulation pattern during the Miocene, but no direct evidence has yet been provided for effective heat transport to the northern North Atlantic during that time. Climatic signals from 11 precisely dated plantbearing sedimentary rock formations in Iceland, spanning 15–0.8 m...

2016
Travis Park Erich M. G. Fitzgerald Stephen J. Gallagher Ellyn Tomkins Tony Allan

Australia has a fossil record of penguins reaching back to the Eocene, yet today is inhabited by just one breeding species, the little penguin Eudyptula minor. The description of recently collected penguin fossils from the re-dated upper Miocene Port Campbell Limestone of Portland (Victoria), in addition to reanalysis of previously described material, has allowed the Cenozoic history of penguin...

Journal: :American journal of physical anthropology 1998
B G Richmond J G Fleagle J Kappelman C C Swisher

The first known fossil ape from the early-middle Miocene of Fejej, Ethiopia, is described here. The specimen, FJ-18SB-68, is a partial ulna from a locality dated by 40Ar/39Ar and paleomagnetic methods to a minimum age of 16.18 MYA. Compared to a variety of extant and fossil ulnae, FJ-18SB-68 is most similar to Turkanapithecus, Proconsul, and Pliopithecus, and appears to have been an arboreal qu...

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