Results 11 to 20 of about 3,386 (197)

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

Reassessing a cryptic history of early trilobite evolution [PDF]

open access: yesCommunications Biology, 2022
A reassessment of early trilobite phylogenetic relationships and palaeobiogeographic patterns suggests that a cryptic evolutionary history is unlikely for this group.
James D. Holmes, Graham E. Budd
doaj   +2 more sources

Papers from the 6th International Conference on Trilobites and their Relatives [PDF]

open access: yesFossils and Strata, 2019
A volume from a monograph series featuring seven papers on trilobites with brief summaries This research volume is entitled Papers from the 6th International Conference on Trilobites and their Relatives.
exaly   +4 more sources

Coupled exuviae of the Ordovician Ovalocephalus (Pliomeridae, Trilobita) in South China and its behavioral implications [PDF]

open access: yesPeerJ, 2020
Ecdysis was a vital process during the lives of trilobites. In addition to preserving the morphological changes in trilobite ontogeny, the preservation of its action often captured interesting behavioral information.
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

Ontogenetic moulting behavior of the Cambrian oryctocephalid trilobite Arthricocephalites xinzhaiheensis [PDF]

open access: yesPeerJ, 2021
Moulting behaviors in trilobites are a crucial strategy during development. Previous studies have demonstrated inter-and intraspecific variability of moulting behavior in trilobites.
Yifan Wang   +8 more
doaj   +2 more sources

A new middle Cambrian trilobite with a specialized cephalon from Shandong Province, North China [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Trilobites achieved their maximum generic diversity in the Cambrian, but the peak of morphological disparity of their cranidia occurred in the Middle to Late Ordovician. Early to middle Cambrian trilobites with a specialized cephalon are rare, especially
Zhixin Sun, Han Zeng, Fangchen Zhao
doaj   +1 more source

Cephalic biomechanics underpins the evolutionary success of trilobites [PDF]

open access: yes, 2021
Altres ajuts: CERCA Programme/Generalitat de CatalunyaArthropods (i.e. insects, spiders, crustaceans, myriapods and others), are the most successful Phanerozoic animals.
Francesc Pérez‐Peris   +10 more
core   +1 more source

Advances in the Lower Ordovician of the western Iberian Chain, NE Spain [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
The western Iberian Chain of NE Spain represents a lateral prolongation of the West Asturian-Leonese Zone. As other proximal sectors fringing NW Gondwana, the chain comprises a con­formable and continuous Furongian‒Tremadocian transition, comprising a
J. Javier Álvaro   +1 more
doaj   +1 more source

First confident evidence of moulting in eodiscid trilobites from the Cambrian Stage 3 of South China [PDF]

open access: yes, 2023
Trilobite moulting behaviour has been extensively investigated. However, exuviae in eodiscid trilobites are poorly known. Here, we report two eodiscid trilobite specimens, Tsunyidiscus niutitangensis and Tsunyidiscus sp., showing Somersault configuration
Yu, Rongxing   +9 more
core   +1 more source

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