Results 131 to 140 of about 80,779 (273)
Most Compact Parsimonious Trees [PDF]
arXiv, 2016 Construction of phylogenetic trees has traditionally focused on binary trees where all species appear on leaves, a problem for which numerous efficient solutions have been developed. Certain application domains though, such as viral evolution and transmission, paleontology, linguistics, and phylogenetic stemmatics, often require phylogeny inference ...
arxiv
The Depositional Record, EarlyView.Late Jurassic extension, footwall uplift, erosion and karstification of marine Jurassic carbonates in the western Cameros Basin (Spain) resulted in the deposition of ?Upper Kimmeridgian‐Tithonian syntectonic alluvial fan deposits and a series of ?Tithonian to Berriasian distal alluvial marls, palustrine, lacustrine and finally lagoonal carbonates.
Nigel H. Platt, V. Paul Wright
wiley +1 more source
The Depositional Record, EarlyView.While the Smithian–Spathian boundary carbon isotopic excursion has been traditionally interpreted as capturing global carbon cycle behaviour, recent studies have suggested that at least some Early Triassic carbon isotopic excursions may incorporate influences from authigenic or early diagenetic processes.
Jordan P. Todes +6 more
wiley +1 more source
Crossed Tracks: Mesolimulus, Archaeopteryx, and the Nature of Fossils [PDF]
, 2019 Organisms leave a variety of traces in the fossil record. Among these traces, vertebrate and invertebrate paleontologists conventionally recognize a distinction between the remains of an organism’s phenotype (body fossils) and the remains of an organism ...
Finkelman, Leonard
core +1 more source
Mixed clastic‐carbonate lake margin systems: An example from the Triassic of East Greenland
The Depositional Record, EarlyView.This study examines a rare example of a mixed clastic‐carbonate shore zone from the Late Triassic of East Greenland. Two facies models are proposed. The interaction of sediment supply and production are shown to be key factors in governing facies development and these are in turn predominantly controlled by lake‐level dynamics and lake margin ...
Steven D. Andrews, Li Guo
wiley +1 more source
Developmental traits and life strategy of redlichiid trilobites
Biological Reviews, Volume 98, Issue 1, Page 63-80, February 2023., 2023 ABSTRACT The developmental mode of four redlichiid trilobites is summarized, based upon exceptionally well‐preserved, articulated specimens from Cambrian Series 2 (stages 3 and 4) strata in southwestern China and South Australia. These relatively complete developmental sequences indicate a balanced rate in segment increase and addition to the thorax ...
Tao Dai, Xingliang Zhang, Shanchi Peng
wiley +1 more source
Ancient DNA from 120-Million-Year-Old Lycoptera Fossils Reveals Evolutionary Insights [PDF]
arXivHigh quality ancient DNA (aDNA) is essential for molecular paleontology. Due to DNA degradation and contamination by environmental DNA (eDNA), current research is limited to fossils less than 1 million years old. The study successfully extracted DNA from Lycoptera davidi fossils from the Early Cretaceous period, dating 120 million years ago. Using high-
arxiv
The Depositional Record, EarlyView.In this study, sandstones of the Lower Jurassic Datta Formation (DF‐LJ) in the Salt and Trans‐Indus Ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy (SEM) and petrophysical analysis.
Salman Ahmed Khattak +7 more
wiley +1 more source
Biological Reviews, Volume 98, Issue 1, Page 284-315, February 2023., 2023 ABSTRACT Actinopterygii makes up half of living vertebrate diversity, and study of fossil members during their Palaeozoic rise to dominance has a long history of descriptive work. Although research interest into Palaeozoic actinopterygians has increased in recent years, broader patterns of diversity and diversity dynamics remain critically understudied.
Struan Henderson +3 more
wiley +1 more source
The Depositional Record, EarlyView.A new classification for inland freshwater palaeowetlands to be used in the field or core laboratory by sedimentologists, providing examples from the Guadix Basin (southern Spain). Abstract Present wetlands have proven to be delicate, biodiverse ecosystems, that are natural sinks for CO2 and act as good indicators for climate changes.
S. Pla‐Pueyo +1 more
wiley +1 more source