Results 51 to 60 of about 1,669,619 (276)

Diversification of insects since the Devonian: a new approach based on morphological disparity of mouthparts

open access: yesScientific Reports, 2018
The majority of the analyses of the evolutionary history of the megadiverse class Insecta are based on the documented taxonomic palaeobiodiversity. A different approach, poorly investigated, is to focus on morphological disparity, linked to changes in ...
Patricia Nel   +2 more
doaj   +1 more source

Redescription of the Triassic cynodont Cistecynodon parvus and reassessment of its phylogeny

open access: yesThe Anatomical Record, EarlyView.
Abstract Cynodontia is an important subclade of Therapsida that first occurred in the late Permian. It includes extinct subclades which are the non‐mammaliaform cynodonts and Mammaliaformes, with the latter ultimately giving rise to crown mammals. The systematics of non‐mammaliaform cynodonts has been extensively studied and is relatively well‐resolved,
Erin S. Lund   +4 more
wiley   +1 more source

A giant Late Triassic ichthyosaur from the UK and a reinterpretation of the Aust Cliff 'dinosaurian' bones.

open access: yesPLoS ONE, 2018
The largest reported ichthyosaurs lived during the Late Triassic (~235-200 million years ago), and isolated, fragmentary bones could be easily mistaken for those of dinosaurs because of their size.
Dean R Lomax   +3 more
doaj   +1 more source

Late paleozoic to early mesozoic provenance record of paleo-pacific subduction beneath South China [PDF]

open access: yes, 2015
Northeast trending Yong'an Basin, southeast South China Craton, preserves a Permian-Jurassic, marine to continental, siliciclastic-dominated, retroarc foreland basin succession.
Hu, L.   +4 more
core   +1 more source

Widespread distribution of large silesaurids evidenced by a new record from the Middle Triassic of southwest Gondwana

open access: yesThe Anatomical Record, EarlyView.
The largest silesaurid known from South America is described here, demonstrating that silesaurids reached large body sizes in southwestern Gondwana. This discovery further underscores the widespread geographic distribution and temporal persistence of large silesaurids across Pangea, despite faunal turnovers and environmental events such as the Carnian ...
Rodrigo Temp Müller
wiley   +1 more source

Working with laws, regularities and singularities in biology: The evolution of mammalian red blood cell size as a case study

open access: yesThe Anatomical Record, EarlyView.
Abstract Phylogenetic comparative methods have been used in recent literature to work with laws and test for regularities (evolutionary associations of quantitative features) and evolutionary singularities (features that evolved in a single taxon). We analyzed these uses epistemologically, taking the evolution of red‐blood‐cell mean corpuscular volume (
Jorge Cubo   +3 more
wiley   +1 more source

Tectonic evolution of a sequence of related late Permian transtensive coal-bearing sub-basins, Mongolia: A global wrench tectonics portrait

open access: yesMongolian Geoscientist, 2023
During the late Permian in Mongolia, inertia-driven transtensive reactivation of primordial fracture zones gave rise to the development of a sequence of related, but isolated, fault-bounded sub-basins; some of these became the locus of substantial peat ...
Per Michaelsen, Karsten M. Storetvedt
doaj   +1 more source

Exploring the cranial morphology and possible convergences of Triassic non‐crocodylomorph pseudosuchians (Archosauria: Pseudosuchia) with other sauropsids through linear morphometrics

open access: yesThe Anatomical Record, EarlyView.
Abstract Triassic pseudosuchians had highly diversified cranial morphologies. These archosaurs occupied diverse ecological roles, ranging from terrestrial predators and herbivores to semiaquatic ambush predators and possible waders. Here, we apply linear cranial morphometrics to assess possible convergences with other sauropsids from the clades ...
Rafael Terras   +3 more
wiley   +1 more source

A new chronology for the late Triassic to early Jurassic. Geologica Ultraiectina (323) [PDF]

open access: yes, 2010
Throughout geological history of life, a small number of mass extinctions have forever changed the path of evolution. The two main mechanisms that account for these dramatic events are asteroid impacts and massive volcanic eruptions of Large Igneous ...
Deenen, M.H.L.
core   +2 more sources

INVERTEBRATE TRACE FOSSILS FROM TRIASSIC CONTINENTAL SUCCESSIONS OF SAN JUAN PROVINCE, ARGENTINA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2015
This paper is the first report on invertebrate trace fossil assemblages from Marayes-El Carrizal and Ischigualasto-Villa Unión Basins (Triassic), San Juan Province, northwestern Argentina.
Ricardo N. Melchor   +2 more
doaj  

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