Results 51 to 60 of about 2,442 (222)

An in situ shelly fauna from the lower Paleozoic Zapla diamictite of northwestern Argentina: implications for the age of glacial events across Gondwana [PDF]

, 2015
A shelly fauna from the upper part of the Zapla glacial diamictite includes thelingulate brachiopod Orbiculoidea radiata Troedsson, the rhynchonelliforms Dalmanella cf. testudinaria (Dalman) and Paromalomena sp., the bivalve Modiolopsis?
Benedetto, Juan Luis Arnaldo, de la Puente, Graciela Susana, Halpern, Karen, Monaldi, Cesar Ruben   +3 more
core   +2 more sources

Sequence of post-moult exoskeleton hardening preserved in a trilobite mass moult assemblage from the Lower Ordovician Fezouata Konservat-Lagerstätte, Morocco [PDF]

Acta Palaeontologica Polonica, 2019
Euarthropods have a tough exoskeleton that provides crucial protection from predation and parasitism. However, this is restrictive to growth and must be periodically moulted.
Harriet B. Drage, Thijs R.A. Vandenbroucke, Peter Van Roy, Allison C. Daley   +3 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]

, 2017
Fossilized growth series provide rare glimpses into the development of ancient organisms, illustrating descriptively how size and shape changed through ontogeny.
Fusco, Giuseppe, Hong, Paul S., Hou, Jinbo, Hughes, Nigel C.   +3 more
core   +2 more sources

Larvae and relationships of the Calymenina (Trilobita)

Journal of Paleontology, 1990
Up to four discrete protaspid larval stages are described for calymenid trilobites of Ordovician to Devonian age. The earliest growth stages are nonadult-like planktonic protaspides; later protaspides are adult-like and benthonic. In contrast, the related homalonotid trilobites apparently lack planktonic protaspides, but have up to two large benthonic ...
Chatterton, B, Siveter, D, Edgecombe, G, Hunt, A   +3 more
openaire   +2 more sources

Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China [PDF]

Estonian Journal of Earth Sciences, 2014
Upper lower Cambrian (provisional Cambrian Series 2) trilobites are described from three sections through the Shuangyingshan Formation in the Beishan area, northwestern Gansu Province, China. The trilobite fauna is dominated by eodiscoid and corynexochid
Jan Bergström†, Zhou Zhiqiang, Per Ahlberg, Niklas Axheimer   +3 more
doaj   +1 more source

A xandarellid artiopodan from Morocco – a middle Cambrian link between soft-bodied euarthropod communities in North Africa and South China [PDF]

, 2017
NB. A corrigendum [correction] for this article was published online on 09 May 2017; this has been attached to this article as an additional file. This work is licensed under a Creative Commons Attribution 4.0 International License.
AC Maloof, AY Ivantsov, C Aria, CD Walcott, D Fu, D Waloszek, D Waloszek, DA Legg, DA Legg, DA Legg, DA Legg, DC García-Bellido, DC García-Bellido, DEG Briggs, DEG Briggs, DL Bruton, E Landing, E Landing, ELO Martin, G Geyer, G Geyer, G Geyer, G Kühl, GA Boxshall, GD Edgecombe, GD Edgecombe, GE Budd, GE Budd, HB Whittington, HB Whittington, HB Whittington, J Bergström, J Chen, J Ortega-Hernández, J Ortega-Hernández, J Ortega-Hernández, J Ortega-Hernández, J Ortega-Hernández, J Ortega-Hernández, J Yang, J Yang, JJ Álvaro, JJ Álvaro, JL Cisne, JR Hendricks, JR Paterson, JR Paterson, JR Paterson, JT Haug, L Ramsköld, L Ramsköld, M Stein, M Stein, M Stein, NJ Butterfield, P Van Roy, P Van Roy, Q Liu, R Lerosey-Aubril, R Lerosey-Aubril, RA Fortey, RA Fortey, S Conway Morris, SE Gabbott, SP Hesselbo, TH Torsvik, W Stürmer, X Hou, X Hou, X Zhang, X Zhang, X Zhang, X Zhang, X-L Zhang, Y Liu   +74 more
core   +1 more source

Late Cambrian fossils from the Climie Formation, western Tasmania [PDF]

, 1978
The Climie Formation, which is about 460 metres thick in the type section of the Dundas Group, contains the youngest known fossils within the Dundas Group.
Jago, JB
core   +2 more sources

Class Trilobita (including agnostoids) from Argentine Precordillera

Biogeographia – The Journal of Integrative Biogeography, 2023
Fil: Devincenzi, Susana Mariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo.
Devincenzi, Susana Mariel, Bordonaro, Osvaldo Luis   +1 more
openaire   +4 more sources

Making the most of clade selection [PDF]

, 2017
Clade selection is unpopular with philosophers who otherwise accept multilevel selection theory. Clades cannot reproduce, and reproduction is widely thought necessary for evolution by natural selection, especially of complex adaptations.
Doolittle, W. Ford
core   +1 more source

The evolutionary history of Coleoptera (Insecta) in the late Palaeozoic and the Mesozoic

Systematic Entomology, Volume 49, Issue 3, Page 355-388, July 2024.
Structural transformations of the elytra and abdomen played a major role in the early beetle evolution in the Permian. Polyphaga appear late in the fossil record, with only a few fossils of Elateriformia in the Late Triassic. Several factors were involved in the enormous diversification of beetles in the Cretaceous but evolutionary interactions with ...
Rolf G. Beutel, Chunpeng Xu, Edmund Jarzembowski, Robin Kundrata, Brendon E. Boudinot, Duane D. McKenna, Jakub Goczał   +6 more
wiley   +1 more source