نتایج جستجو برای: early miocene

تعداد نتایج: 690878  

Journal: :Zootaxa 2013
Santiago R Ron Ana Almendariz David C Cannatella

The Phyllomedusa perinesos group is composed of four species that inhabit cloud forests in the eastern Andean slopes. We estimated the phylogenetic relationships among them and their closest relatives using mitochondrial DNA sequences. Our results confirm the monophyly of the group and a close relationship with the Amazonian species Phyllomedusa atelopoides and Phyllomedusa tomopterna. A chrono...

Journal: :Acta Palaeobotanica 2021

The early and middle Miocene in Turkey was characterised by a warm climate diversified rich vegetation. Many fossil angiosperm genera have been identified from this period. present study re-examined previously identifed new samples of wood remains. studied material included thin sections housed at the Department Forest Botany, Division Engineering, Faculty Forestry, Istanbul University-Cerrahpa...

2018
C. Verity Bennett Paul Upchurch Francisco J. Goin Anjali Goswami

—Despite a global fossil record, Metatheria are now largely restricted to Australasia and South America. Most metatherian paleodiversity studies to date are limited to particular subclades, time intervals, and/or regions, and few consider uneven sampling. Here, we present a comprehensive new data set on metatherian fossil occurrences (Barremian to end Pliocene). These data are analyzed using st...

2003
Philip J. Bart

Seismic correlation of glacial unconformities from the Ross Sea outer continental shelf to chronostratigraphic control at DSDP sites 272 and 273 indicates that at least two West Antarctic Ice Sheet (WAIS) expansions occurred during the early part of the middle Miocene (i.e. well before completion of continental-scale expansion of the East Antarctic Ice Sheet (EAIS) inferred from N18O and eustat...

2014
Ana Rosa Gómez Cano Juan L. Cantalapiedra M. Ángeles Álvarez-Sierra Manuel Hernández Fernández

Deep-time perspectives in macroecology are essential with regard to understanding the impact of climate forcing on faunal communities. Using late Miocene rodent faunas (12 to 5 Ma) from two different biogeographical provinces from southwestern Europe, we asked whether the waxing and waning of faunas with dissimilar ecological affinities tracked climate in different ways. The latest middle Mioce...

2016
Weitao Wang Peizhen Zhang Wenjun Zheng Dewen Zheng Caicai Liu Hongyan Xu Huiping Zhang Jingxing Yu Jianzhang Pang

Significant climate shifts in the northeastern Tibetan Plateau have taken place during the Cenozoic, but the reasons behind them remain unclear. In order to unravel the mechanisms driving these climate changes, proxy data with accurate age constraint are needed. Here we present magnetostratigraphy, sediment color (redness a*, and lightness L*) and grain-size analysis from an early to middle Mio...

Journal: :Journal of human evolution 2001
E P Heizmann D R Begun

Engelswies is an early Miocene vertebrate locality in southern Germany with a rich assemblage of terrestrial mammals, invertebrates and fossil plants. It is dated to 16.5-17.0 Ma based on magnetostratigraphy, biostratigraphy and lithostratigraphy, and includes among the faunal remains a hominoid upper molar fragment, the oldest hominoid so far identified from Europe. The evidence from Engelswie...

Journal: :Molecular phylogenetics and evolution 2010
Natan Medeiros Maciel Rosane Garcia Collevatti Guarino Rinaldi Colli Elisabeth Ferroni Schwartz

We investigated the phylogeny and biogeography of the Rhinella marina group, using molecular, morphological, and skin-secretion data, contributing to an understanding of Neotropical faunal diversification. The maximum-parsimony and Bayesian analyzes of the combined data recovered a monophyletic R. marina group. Molecular dating based on Bayesian inferences and fossil calibration placed the earl...

2006
Oliver Hampe

Hoplocetus ritzi n. sp. is a new hoplocetine physeterid from the Bolboforma fragori/subfragoris Zone of the middle/late Miocene mica-clay of Groß Pampau in Schleswig-Holstein, North Germany. The Hoplocetinae are known from the early Miocene to the Pliocene. Comparative studies of cranial characters and tooth morphology allow an emended diagnosis of the Hoplocetinae Cabrera, 1926. Four genera, D...

2007
David W. Cameron MONTE L. McCROSSIN

According to David W. Cameron, the goal of his book Hominid Adaptations and Extinctions is “to examine the evolution of ape morphological form in association with adaptive strategies and to understand what were the environmental problems facing Miocene ape groups and how these problems influenced ape adaptive strategies” (p. 4). Cameron describes himself as being “acknowledged internationally a...

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