Results 21 to 30 of about 108 (100)

Revised phylogenetic analysis of the Aetosauria (Archosauria: Pseudosuchia); assessing the effects of incongruent morphological character sets [PDF]

PeerJ, 2016
Aetosauria is an early-diverging clade of pseudosuchians (crocodile-line archosaurs) that had a global distribution and high species diversity as a key component of various Late Triassic terrestrial faunas.
William G. Parker
doaj   +2 more sources

Osteology of the Late Triassic aetosaur Scutarx deltatylus (Archosauria: Pseudosuchia) [PDF]

PeerJ, 2016
Aetosaurians are some of the most common fossils collected from the Upper Triassic Chinle Formation of Arizona, especially at the Petrified Forest National Park (PEFO). Aetosaurians collected from lower levels of the park include Desmatosuchus spurensis,
William G. Parker
doaj   +2 more sources

Redescription and Phylogenetic Placement of †Hemicalypterus weiri Schaeffer, 1967 (Actinopterygii, Neopterygii) from the Triassic Chinle Formation, Southwestern United States: New Insights into Morphology, Ecological Niche, and Phylogeny. [PDF]

PLoS ONE, 2016
The actinopterygian fish †Hemicalypterus weiri Schaeffer, 1967 is herein redescribed and rediagnosed based on new information collected from reexamination of museum specimens as well as examination of recently collected specimens from the Upper Triassic ...
Sarah Z Gibson
doaj   +1 more source

Paleoneuroanatomy of the aetosaur Neoaetosauroides engaeus (Archosauria: Pseudosuchia) and its paleobiological implications among archosauriforms [PDF]

PeerJ, 2018
The paleoneuroanatomy of pseudosuchian archosaurs is poorly known, based on direct examination of the internal morphology of braincases and a few artificial endocasts.
M. Belen von Baczko, Jeremías R.A. Taborda, Julia Brenda Desojo   +2 more
doaj   +2 more sources

Using Macro- and Microscale Preservation in Vertebrate Fossils as Predictors for Molecular Preservation in Fluvial Environments

Biology, 2022
Exceptionally preserved fossils retain soft tissues and often the biomolecules that were present in an animal during its life. The majority of terrestrial vertebrate fossils are not traditionally considered exceptionally preserved, with fossils falling ...
Caitlin Colleary, Shane O’Reilly, Andrei Dolocan, Jason G. Toyoda, Rosalie K. Chu, Malak M. Tfaily, Michael F. Hochella, Sterling J. Nesbitt   +7 more
doaj   +1 more source

A taxonomic revision and cranial description of Terrestrisuchus gracilis (Archosauria, Crocodylomorpha) from the Upper Triassic of Pant‐y‐Ffynnon Quarry (southern Wales)

Papers in Palaeontology, Volume 9, Issue 6, November/December 2023., 2023
Abstract Non‐crocodyliform crocodylomorphs, formerly referred to the informal group ‘Sphenosuchia’, are the earliest known crocodylomorph precursors of extant crocodylians. They are therefore crucial for our understanding of early crocodylian evolution and the origin of typical crocodylian characteristics, such as the formation of a secondary palate ...
Stephan N. F. Spiekman, Vincent Fernandez, Richard J. Butler, Kathleen N. Dollman, Susannah C. R. Maidment   +4 more
wiley   +1 more source

New Geochronological Age Constraint and Chemostratigraphy for Aptian Lacustrine Strata, Cedar Mountain Formation, Utah

Geochemistry, Geophysics, Geosystems, Volume 24, Issue 9, September 2023., 2023
Abstract The Early Cretaceous is an important time of transition in Earth history, marked by a succession of oceanic anoxic events and carbon cycle perturbations that drove changes on land and in the ocean. The need for more precise geochronologic constraints in terrestrial sediments of Early Cretaceous age that record faunal and floral transitions is ...
Marina B. Suarez, Aisha Al Suwaidi, Elizabeth H. Montgomery, James I. Kirkland, Joe Andrew, Noah Mclean, Andreas Möller, Gregory Ludvigson, Celina A. Suarez   +8 more
wiley   +1 more source

A bird-like skull in a Triassic diapsid reptile increases heterogeneity of the morphological and phylogenetic radiation of Diapsida [PDF]

Royal Society Open Science, 2017
The Triassic Period saw the first appearance of numerous amniote lineages (e.g. Lepidosauria, Archosauria, Mammalia) that defined Mesozoic ecosystems following the end Permian Mass Extinction, as well as the first major morphological diversification of ...
Adam C. Pritchard, Sterling J. Nesbitt
doaj   +1 more source

Depositional and Diagenetic Processes of Martian Lacustrine Sediments as Revealed at Pahrump Hills by the Mars Hand Lens Imager, Gale Crater, Mars

Journal of Geophysical Research: Planets, Volume 128, Issue 5, May 2023., 2023
Abstract The Murray formation represents fine‐grained sedimentary deposition in lacustrine environments within Gale crater, Mars. Both the overall thickness of the Murray formation and its broad uniformity in sedimentary character suggest the potential for a long‐lived, groundwater‐supported lake system.
R. A. Yingst, A. C. Cowart, L. C. Kah, S. Gupta, K. Stack, D. Fey, D. Harker, K. Herkenhoff, M. E. Minitti, S. Rowland   +9 more
wiley   +1 more source

The earliest evidence of holometabolan insect pupation in conifer wood. [PDF]

PLoS ONE, 2012
BACKGROUND: The pre-Jurassic record of terrestrial wood borings is poorly resolved, despite body fossil evidence of insect diversification among xylophilic clades starting in the late Paleozoic.
Leif Tapanila, Eric M Roberts
doaj   +1 more source