Results 11 to 20 of about 12,118 (234)

Allopatric molting of Devonian trilobites [PDF]

open access: yesScientific Reports, 2022
Trilobite exuviae record the development of individual trilobites and their molting process and can also contain information on their behavior. The silt- to fine-grained tuffites of the middle part of the Middle Member of the Upper Devonian Hongguleleng ...
Ruiwen Zong, Yiming Gong
doaj   +2 more sources

Was the Kalkarindji Continental Flood Basalt Province a Driver of Environmental Change at the Dawn of the Phanerozoic?

open access: yesGeophysical Monograph Series, Page 435-447., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Peter E. Marshall   +2 more
wiley  

+3 more sources

Phylogeny and evolutionary modularity of a trilobite family over the Ordovician Radiation [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Trilobites are organized in packages; the adult trilobite body plan is composed of a cephalon (head), thorax (midsection), and pygidium (tail). These packages, or modules, are composed of traits that evolve semi-independently such that change in one ...
Ernesto E. Vargas-Parra   +1 more
doaj   +1 more source

Early Cambrian (Marianian) trilobites and associated faunas from the Sierra Norte de Sevilla Geopark: A scientific and heritage approach. [PDF]

open access: yesGeoconservation Research, 2021
Some exceptional paleontological trilobite sites located in the Sierra Norte de Sevilla UNESCO Global Geopark are presented herein, together with an analysis of their geotourism / geotrail potential and a proposal for geoconservation.
Eduardo Mayoral Alfaro   +7 more
doaj   +1 more source

Development of eodiscinid trilobites [PDF]

open access: bronzeBiological Reviews
ABSTRACTA comprehensive review of a full developmental sequence of eodiscinid trilobites reported in recent decades from Cambrian Series 2 and 3 strata is presented. These mostly articulated specimens exhibit detailed morphologies with preservation of even delicate structures at different growth stages, such as the bacculae, axial pores, spine pores ...
Tao Dai, Xingliang Zhang
openaire   +3 more sources

A summary of the Brazilian Paraná Basin Ordovician [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
The study of the Ordovician of Paraná Basin culminated on the three-fold lithostratigraphic subdivision of the Rio Ivaí Group as follows: Alto Garças, Iapó and Vila Maria formations.
Carolina Zabini   +11 more
doaj   +1 more source

Early Silurian (Llandovery) Trilobite fauna from [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2020
The aim of this study is to analyze the assemblage of trilobites in the Silurian sequences of Iran by exploring stratigraphic section of the Silurian Niur Formation (Asadli section).
Hamed Ameri
doaj   +1 more source

Systematics, morphology, and appendages of an Early Ordovician pilekiine trilobite Anacheirurus from Fezouata Shale and the early diversification of Cheiruridae [PDF]

open access: yesActa Palaeontologica Polonica, 2021
Pilekiines are the earliest diverging members of the successful trilobite family Cheiruridae. The pilekiine genus Anacheirurus is characterized by sub-quadratic to sub-oval glabella, pitted genae, and a distinct trunk with elongated pleural spines in ...
FRANCESC PÉREZ-PERIS   +3 more
doaj   +1 more source

Injuries and molting interference in a trilobite from the Cambrian (Furongian) of South China [PDF]

open access: yesPeerJ, 2021
An injured Shergoldia laevigata Zhu, Hughes & Peng, 2007 (Trilobita, Asaphida) was collected from the Furongian of Guangxi, South China. The injuries occurred in the left thoracic pleurae possessing two marked V-shaped gaps.
Ruiwen Zong
doaj   +2 more sources

Home - About - Disclaimer - Privacy