Results 21 to 30 of about 8,152 (200)

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

Trilobite expansion into estuarine environments during the Ordovician radiation [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Trilobites have traditionally been considered fully marine. Through the integration of ichnological, palaeobiological and sedimentological datasets within a sequence-stratigraphic and strati­graphic palaeobiology framework, we challenge this assumption.
M. Gabriela Mángano   +5 more
doaj   +1 more source

First record of the Ordovician fauna in Mila-Kuh, eastern Alborz, northern Iran [PDF]

open access: yesEstonian Journal of Earth Sciences, 2015
Restudy of the Cambrian–Ordovician boundary beds, traditionally assigned to the Mila Formation Member 5 in Mila-Kuh, northern Iran, for the first time provides convincing evidence of the Early Ordovician (Tremadocian) age of the uppermost part of the ...
Mohammad-Reza Kebria-ee Zadeh   +4 more
doaj   +1 more source

The oldest known digestive system consisting of both paired digestive glands and a crop from exceptionally preserved trilobites of the Guanshan Biota (Early Cambrian, China). [PDF]

open access: yesPLoS ONE, 2017
The early Cambrian Guanshan biota of eastern Yunnan, China, contains exceptionally preserved animals and algae. Most diverse and abundant are the arthropods, of which there are at least 11 species of trilobites represented by numerous specimens.
Melanie J Hopkins   +3 more
doaj   +1 more source

Crawlers on the Seabed – The Famous Devonian Trilobites of Gerolstein [PDF]

open access: yesGeoconservation Research, 2021
This paper introduces the Middle Devonian trilobites of Gerolstein, found on the famous trilobite fields of Gees and at the Auberg hill in Gerolstein.
Jens Koppka
doaj   +1 more source

Polyatomic trilobite Rydberg molecules in a dense random gas [PDF]

open access: yes, 2004
Trilobites are exotic giant dimers with enormous dipole moments. They consist of a Rydberg atom and a distant ground-state atom bound together by short-range electron-neutral attraction. We show that highly polar, polyatomic trilobite states unexpectedly
Luukko, Perttu J. J., Rost, Jan-Michael
core   +4 more sources

The Souss lagerstätte of the Anti-Atlas, Morocco: discovery of the first Cambrian fossil lagerstätte from Africa

open access: yesScientific Reports, 2021
Episodic low oxygenated conditions on the sea-floor are likely responsible for exceptional preservation of animal remains in the upper Amouslek Formation (lower Cambrian, Stage 3) on the northern slope of the western Anti-Atlas, Morocco.
Gerd Geyer, Ed Landing
doaj   +1 more source

Discovery of trilobite trace fossils from the Early to Middle Cambrian, Tabas Block, Central Iran [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2017
Early to Middle Cambrian successions exposed at the Shirgesht area, Tabas Block of central Iran has yielded a high diversity and abundant ichnofossils with arthropod trackways. These trace fossils contain diverse ethological patterns, including furrowing
ئارام بایت گل   +2 more
doaj   +1 more source

The development of the Silurian trilobite Aulacopleura koninckii reconstructed by applying inferred growth and segmentation dynamics: A case study in paleo-evo-devo [PDF]

open access: yes, 2017
Fossilized growth series provide rare glimpses into the development of ancient organisms, illustrating descriptively how size and shape changed through ontogeny.
Fusco, Giuseppe   +3 more
core   +2 more sources

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