Results 51 to 60 of about 6,337 (221)

The Earliest Feathers from the Lower Cretaceous Dabeigou Formation of North Hebei: Implications for the Early Evolution of the Jehol Biota

Integrative Zoology, EarlyView.
This study reports two isolated feather fossils from the Lower Cretaceous Dabeigou Formation in northeastern China. Morphological analyses identified them as the earliest known feathered theropods (potentially including avian) in the Jehol Biota. This finding reveals a complex ecosystem at the dawn of the Jehol Biota, bridging the temporal and faunal ...
Qian Wu, Qian‐Nan Zhang, Dang‐Peng Xi   +2 more
wiley   +1 more source

Morphometric and Paleobiological Insights Into Pleistocene Sicilian Wolf Populations

Acta Zoologica, EarlyView.
ABSTRACT The Pleistocene wolves (Canis lupus) from Sicily represent one of the few known insular populations of this species from that time period. Despite their potential relevance for understanding carnivore adaptations in insular contexts, no dedicated study has previously investigated their morphology and evolutionary significance.
Domenico Tancredi, Carolina Di Patti, Sabrina Lo Brutto, Matteo Cammarata   +3 more
wiley   +1 more source

Microbial Communities in Pre-Columbian Coprolites

PLoS ONE, 2013
The study of coprolites from earlier cultures represents a great opportunity to study an "unaltered" composition of the intestinal microbiota. To test this, pre-Columbian coprolites from two cultures, the Huecoid and Saladoid, were evaluated for the presence of DNA, proteins and lipids by cytochemical staining, human and/or dog-specific Bacteroides spp.
Santiago-Rodriguez, Tasha M., Narganes-Storde, Yvonne M., Chanlatte, Luis, Crespo-Torres, Edwin, Toranzos, Gary A., Jiménez-Flores, Rafael, Hamrick, Alice, Cano, Raul J.   +7 more
openaire   +5 more sources

Mid‐infrared spectroscopy applied to a multi‐level cave system (Montmaurin, SW France): An innovative method for assessing sediment provenance

Sedimentology, EarlyView.
ABSTRACT Deciphering sediment provenance is essential to understand depositional patterns and dynamics. This question is particularly important in archaeological contexts to constrain the sedimentological history of unearthed material—an information critically needed, for example, to estimate the age of the deposits—or to apprehend sediment movement ...
Fuchs Coraline, Rambeau Claire, Ertlen Damien, Rixhon Gilles, Perrenoud Christian, Ponche Jean‐Luc, Trautmann Martine, Benarioumlil Sylvain, Vialet Amélie   +8 more
wiley   +1 more source

Depositional and stratigraphic evolution of a Permian megalake system: Implications for seiche‐influenced models

The Depositional Record, Volume 12, Issue 2, April 2026.
During the Late Permian, the rise of the Gondwanides Belt trapped marine waters, giving birth to a vast megalake. This lake shifted between overfilled, balanced‐fill and underfilled stages that are recorded by high‐frequency accommodation changes, while meteorological seiches shaped the sedimentary dynamic and produced heterolithic beds.
B. Christofoletti, L. V. Warren, F. G. Varejão, M. G. Rodrigues, M. G. Simões, D. V. Palcu, M. L. Assine   +6 more
wiley   +1 more source

The oldest known communal latrines provide evidence of gregarism in Triassic megaherbivores [PDF]

, 2013
Defecation in communal latrines is a common behaviour of extant mammals widely distributed among megaherbivores. This behaviour has key social functions with important biological and ecological implications.
Argañaraz, Eloisa, Desojo, Julia Brenda, Ezcurra, Martin Daniel, Fiorelli, Lucas Ernesto, Hechenleitner, Esteban Martín, Taborda, Jeremías Ramón Alejandro, Trotteyn, Maria Jimena, Von Baczko, Belen   +7 more
core   +1 more source

Lipid analysis of vertebrate coprolites [PDF]

, 2012
Lipid analysis is a relatively new approach to obtaining paleobiological and paleoecological information from coprolites. Lipids in feces are derived from multiple sources, including diet, digestive processes and digestive tract micro-organisms. Feces from herbivorous animals contain a much wider range of lipids than those from carnivores due to the ...
Bull, Ian D, Gill, Fiona L
core   +2 more sources

Helminths as architects of trained tolerance: implications for human health

Clinical &Translational Immunology, Volume 15, Issue 3, 2026.
Abstract Helminths infect nearly 2 billion people worldwide and are a major cause of chronic morbidity in low‐resource regions. Unlike bacterial and viral pathogens that elicit protective memory, helminths actively remodel host immunity to enable their years‐long persistence and reinfection.
Quinn Moroz, Jorge Lucas Nascimento Souza, Neima Briggs   +2 more
wiley   +1 more source

Preservation and interpretation of pollen in hyaena coprolites: taphonomic observations from Spain and southern Africa [PDF]

, 2003
Main articleA survey of palynological research on hyaena coprolites from 10 fossil sites in southern Africa and 4 from Spain shows that coprolites from 10 out of the 14 sites contained fossil pollen.
Brink, James, Carrion, Jose, Fernandez-Jalvo, Yolanda, Scott, Louis   +3 more
core  

Fragments of the earliest land plants [PDF]

, 2003
The earliest fossil evidence for land plants comes from microscopic dispersed spores. These microfossils are abundant and widely distributed in sediments, and the earliest generally accepted reports are from rocks of mid-Ordovician age (Llanvirn, 475 ...
CH Wellman, CH Wellman, CH Wellman, D Edwards, D Edwards, D Edwards, D Edwards, D Edwards, D Edwards, DL Nickrent, E Pacini, HHJ Droste, HP Banks, J Gray, J Gray, JB Richardson, LE Graham, P Kenrick, P Kenrick, P Steemans, PK Strother, RC Brown, SB Kroken, WA Taylor, WA Taylor, YL Qiu   +25 more
core   +1 more source