Results 61 to 70 of about 6,571 (197)

Climate variability, heat distribution, and polar amplification in the warm unipolar “icehouse” of the Oligocene [PDF]

Climate of the Past
The Oligocene (33.9–23.03 Ma) had warm climates with flattened meridional temperature gradients, while Antarctica retained a significant cryosphere. These may pose imperfect analogues to distant future climate states with unipolar icehouse conditions ...
D. K. L. L. Jenny, T. Reichgelt, C. L. O'Brien, X. Liu, P. K. Bijl, M. Huber, A. Sluijs   +6 more
doaj   +1 more source

Integrative phylogenomics and morphology reveal the evolution and biogeography of Encephalartos (Zamiaceae)

Journal of Systematics and Evolution, EarlyView.
We aimed to conduct phylogenetic analyses of Encephalartos, a cycad genus endemic to Africa, using 3545 single‐copy nuclear genes extracted from transcriptome data, covering 64/65 of the recognized species, along with inference of divergence times using two secondary calibration points.
Sadaf Habib, Anders Lindstrom, James A.R. Clugston, Yiqing Gong, Shanshan Dong, Yunhua Wang, Dennis Stevenson, Chen Feng, Shouzhou Zhang   +8 more
wiley   +1 more source

A Near Telomere‐to‐Telomere Genome of Belamcanda chinensis Provides Insights Into Genome Evolution and the Biosynthesis of Characteristic Isoflavones

Plant Biotechnology Journal, EarlyView.
ABSTRACT Belamcanda chinensis is a non‐leguminous medicinal plant rich in bioactive isoflavones; however, the lack of a high‐quality reference genome has limited elucidation of its isoflavone biosynthetic and modification network. Here, we present the first near telomere‐to‐telomere genome assembly of B.
Yuan‐Yuan Wang, Bi‐Huan Chen, Gui‐Sheng Xiang, Yi‐Na Wang, Run Yang, Xiao‐Bo Li, Shi‐Yan Yuan, Yu‐Cheng Zhao, Guang‐Hui Zhang, Min‐Jian Qin, Sheng‐Chao Yang   +10 more
wiley   +1 more source

Variations in downslope activity and bottom current dynamics in a land‐detached submarine channel system since the Last Glacial Maximum

Sedimentology, EarlyView.
ABSTRACT The Gollum Channel System is a land‐detached large‐scale canyon‐channel system situated offshore southwest Ireland on the Northeast Atlantic margin. The system has been considered inactive with downslope gravity flows since the last glacial period, but geophysical data in some of its branches do suggest Holocene activity.
Lotte Verweirder, Aggeliki Georgiopoulou, Kobus Langedock, Fred Fourie, Martin White, Sara Benetti, Fabio Sacchetti, Wieter Boone, David Van Rooij   +8 more
wiley   +1 more source

Development of Holocene lacustrine microbialites on the Iberian Peninsula: Insights into environmental and depositional controls using X‐ray CT and petrography

Sedimentology, EarlyView.
ABSTRACT Microbial mats and microbialites are common in modern and ancient saline lacustrine environments and are highly responsive to biological and environmental factors. As such, they represent important sources of high‐resolution environmental data across a wide range of geological time. Nonetheless, interpretation of fossil mats is non‐trivial due
Connor Doyle, Juan Pablo Corella, Julia Behnsen, Mario Morellón, Celia Martín‐Puertas, Blas Valero Garcés, Stefan Schröder   +6 more
wiley   +1 more source

Evaluating Bayesian Morphological Clocks for Estimating a Dated Phylogeny in a Relict and Fossil‐Rich Family of Wasps (Hymenoptera, Chrysidoidea)

Zoologica Scripta, EarlyView.
ABSTRACT In recent years, a wide array of tools originally developed for molecular dating analyses has been adapted for use within a morphological clock perspective. This is of paramount relevance for taxonomic groups that cannot be sampled in forms suitable for DNA extraction.
Anderson Lepeco, Gabriel A. R. Melo, Brunno B. Rosa   +2 more
wiley   +1 more source

Molecular Phylogeny, Species Delimitation, and Biogeography of the Varunid Crab Genus Metaplax (Crustacea, Varunidae)

Zoologica Scripta, EarlyView.
ABSTRACT The Indo‐West Pacific genus Metaplax comprises 11 recognised species inhabiting intertidal mudflats, some adjacent to mangroves. To resolve long‐standing uncertainties, we analysed mitochondrial (COI, 16S) and nuclear (28S) markers. Phylogenetic analyses recovered Metaplax as monophyletic and resolved four well‐supported clades—the M ...
Jhih‐Wei Hsu, Hsi‐Te Shih, Mani Prema, Jigneshkumar Trivedi, Ngan Kee Ng, Min‐Yun Liu, Samuthirapandian Ravichandran, Peter K. L. Ng   +7 more
wiley   +1 more source

Fossil dolphin Otekaikea marplesi (latest Oligocene, New Zealand) expands the morphological and taxonomic diversity of Oligocene cetaceans.

PLoS ONE, 2014
The Oligocene Epoch was a time of major radiation of the Odontoceti (echolocating toothed whales, dolphins). Fossils reveal many odontocete lineages and considerable structural diversity, but whether the clades include some crown taxa or only archaic ...
Yoshihiro Tanaka, R Ewan Fordyce
doaj   +1 more source

Hydrocarbon accumulation in the deep waters of South China Sea controlled by the tectonic cycles of marginal sea basins

Petroleum Research, 2016
: The tectonic cycle of the marginal sea basins in South China Sea (SCS) includes two cycles, i.e., the formation and contraction of Palaeo-SCS and Neo-SCS.
Gongcheng Zhang, Hongjun Qu, Shixiang Liu, Xiaojun Xie, Zhao Zhao, Huailei Shen   +5 more
doaj   +1 more source

THE OLIGOCENE FORAMINIFERAL BIOSTRATIGRAPHY OF PAKISTAN

Rivista Italiana di Paleontologia e Stratigrafia, 2020
The marine Oligocene deposits of Pakistan are exposed in the Baluchistan and Lower Indus Basins. The Baluchistan Basin deposits are referred to the Khojak Formation of Makran Group.
A. A. KURESHY
doaj