Results 61 to 70 of about 8,152 (200)

Trilobite Eyes and Their Evolution

Arthropoda
Trilobites, as typical euarthropods, possess compound eyes. In 1901, Lindström was the first to describe them in detail; on the one hand, we reconsider his descriptions of the different modes of trilobite eyes; on the other hand, we expand this by ...
Brigitte Schoenemann
doaj   +1 more source

An Increase in Animal Diversity was Facilitated by Ecologically‐Driven Brain Complexity Throughout the Cambrian

BioEssays, Volume 48, Issue 4, April 2026.
The Brain‐First Hypothesis suggests that the Cambrian transition from animals with simple body plans and simple brains to more complex animals was driven by a selection for brains with increased neural processing, following increased ecological complexity, and the networks underlying brain development were co‐opted to pattern other complex systems ...
Ariel D. Chipman
wiley   +1 more source

Welsh Basin [PDF]

, 2011
The Cambrian rocks of Wales mostly lie within the Avalon composite terrane, apart from a small area of Cambrian rocks of the Monian composite terrane that is discussed in Chapter 9.
Molyneux, S.G., Rushton, A.W.A.
core  

The paleobiogeographical significance of the Silurian and Devonian trilobites of Japan [PDF]

, 2019
Six major groups of trilobites from the Silurian and Devonian of Japan are evaluated for their paleobiogeographical signature. Silurian illaenids and scutelluids show four generic-level and at least two species-level links with the Australian segment of ...
Komatsu, Toshifumi, Lane, Philip D, Oji, Tatsuo, Siveter, David J, Siveter, Derek J, Stocker, Christopher P, Tanaka, Gengo, Vandenbroucke, Thijs, Wallis, Simon R, Williams, Mark   +9 more
core   +1 more source

The Permian–Triassic transition in Türkiye: New insights and 3D outcrop models for accessible, reproducible and sustainable fieldwork

The Depositional Record, Volume 12, Issue 2, April 2026.
We studied the Permian–Triassic successions of south‐western Türkiye at five locations, synthesised sedimentological and palaeontological data, putting it into a consistent stratigraphic framework and incorporating 3D digital outcrop models. Abstract The Permian–Triassic transition is characterised by major environmental changes and the largest known ...
Baran Karapunar, Xia Wang, Stella Z. Buchwald, Anja B. Frank, Mónica Alejandra Gómez Correa, Müjde Gürsoy, Zhipeng Liu, Xuanni Xu, Lingzan Meng, Damla Demir, Erdal Koşun, Aymon Baud, William J. Foster   +12 more
wiley   +1 more source

Ultracold chemical reactions of a single Rydberg atom in a dense gas

, 2016
Within a dense environment ($\rho \approx 10^{14}\,$atoms/cm$^3$) at ultracold temperatures ($T < 1\,\mu{}\text{K}$), a single atom excited to a Rydberg state acts as a reaction center for surrounding neutral atoms.
Böttcher, Fabian, Engel, Felix, Gaj, Anita, Greene, Chris H., Hermann, Udo, Hofferberth, Sebastian, Kleinbach, Kathrin S., Liebisch, Tara Cubel, Löw, Robert, Pfau, Tilman, Pérez-Ríos, Jesús, Schlagmüller, Michael, Westphal, Karl M.   +12 more
core   +2 more sources

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Atractocybeloides, eine kleinwüchsige Trilobitengattung aus baltoskandischen Geschieben und ihrem Anstehenden [PDF]

Fossil Record, 2002
Aus mittel- bis oberordovizischen Geschieben werden fünf Taxa der kleinwüchsigen Trilobitengattung Atractocybeloides vorgestellt, davon die beiden neuen Arten Atractocybeloides nebeni n. sp. und Atractocybeloides oepiki n. sp.
H.-H. Krueger
doaj   +3 more sources

New Zealand Geological Timescale 2025

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
New Zealand Geological Timescale 2025 (NZGT 2025) is the first comprehensive update and revision of the New Zealand Geological Timescale in a decade. The criteria used to establish age ranges of New Zealand Stages within the NZGT have been reviewed, calibrated, and revised where required against the 2023/04 International Chronostratigraphic Chart and ...
Christopher D. Clowes, James S. Crampton, Kyle J. Bland, J. Ian Raine, Andrew F. Boyes, Hamish J. Campbell, Erica M. Crouch, Martin P. Crundwell, Neville Hudson, Elizabeth M. Kennedy, Donald A. B. MacFarlan, Hugh E. G. Morgans, Marcus D. Richards, Matthew W. Sagar   +13 more
wiley   +1 more source

Digestive and appendicular soft-parts, with behavioural implications, in a large Ordovician trilobite from the Fezouata Lagerstätte, Morocco [PDF]

, 2017
Trilobites were one of the most successful groups of marine arthropods during the Palaeozoic era, yet their soft-part anatomy is only known from a few exceptionally-preserved specimens found in a handful of localities from the Cambrian to the Devonian ...
A Seilacher, AM English, B Lefebvre, BDE Chatterton, C Neto de Carvalho, E Martin, ELO Martin, HB Whittington, HB Whittington, J Bergström, J Corbacho, J Vannier, J Vannier, J Vinther, M Vidal, NJ Butterfield, O Fatka, P Van Roy, P Van Roy, P Van Roy, R Lerosey-Aubril, RA Fortey, S Gibb, TA Hegna, V Jaanusson   +24 more
core   +1 more source