Quantification of leg mobility in the Burgess Shale Olenoides serratus indicates functional differences between trilobite and xiphosuran appendages [PDF]
BMC BiologyBackground Euarthropod appendages are specialized for diverse roles including feeding, walking, and mating, which require precise morphologies and ranges of motion.
Sarah R. Losso +3 more
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Exploring the vibrational series of pure trilobite Rydberg molecules [PDF]
Nature Communications, 2023 In trilobite Rydberg molecules, an atom in the ground state is bound by electron-atom scattering to a Rydberg electron that is in a superposition of high angular momentum states.
Max Althön +3 more
doaj +2 more sources
Distinct causes underlie double-peaked trilobite morphological disparity in cephalic shape [PDF]
Communications BiologyTrilobite cephalic shape disparity varied through geological time and was integral to their ecological niche diversity, and so is widely used for taxonomic assignments.
Harriet B. Drage, Stephen Pates
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Multiple origins of dorsal ecdysial sutures in trilobites and their relatives [PDF]
eLifeEuarthropods are an extremely diverse phylum in the modern, and have been since their origination in the early Palaeozoic. They grow through moulting the exoskeleton (ecdysis) facilitated by breaking along lines of weakness (sutures).
Kun-sheng Du +5 more
doaj +2 more sources
Implications of Timanian thrust systems in the Barents Sea and Svalbard on using paleontological constraints for plate tectonics reconstructions [version 2; peer review: 1 approved, 2 approved with reservations] [PDF]
Open Research Europe, 2023 Background The Svalbard Archipelago is commonly believed to have been located at comparable latitude and, possibly, to have been attached to Laurentia in the early Paleozoic (500–420 Ma) based on trilobite assemblage similarities.
Jean-Baptiste P. Koehl
doaj +2 more sources
Malformed trilobites from the Cambrian, Ordovician, and Silurian of Australia [PDF]
PeerJ, 2023 Biomineralised remains of trilobites provide important insight into the evolutionary history of a diverse, extinct group of arthropods. Their exoskeletons are also ideal for recording malformations, including evidence of post-injury repair.
Russell D. C. Bicknell +2 more
doaj +3 more sources
Reassessing a cryptic history of early trilobite evolution [PDF]
Communications 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
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Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation [PDF]
Scientific Reports, 2022 The Early Ordovician is a key interval for our understanding of the evolution of life on Earth as it lays at the transition between the Cambrian Explosion and the Ordovician Radiation and because the fossil record of the late Cambrian is scarce.
Farid Saleh +12 more
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Ontogenetic moulting behavior of the Cambrian oryctocephalid trilobite Arthricocephalites xinzhaiheensis [PDF]
PeerJ, 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 +3 more sources
Pygmaclypeatus daziensis, a unique lower Cambrian arthropod with two different compound eye systems [PDF]
Communications BiologyMore than half a billion years ago, a high diversity of organisms appeared in the fossil record. All major clades we know today already existed, and arthropods dominated the marine faunas.
Michel Schmidt +4 more
doaj +2 more sources