Results 31 to 40 of about 104 (62)

Death-defying Morphologies: Mass Extinction and Disparity in the Order Harpetida [PDF]

open access: yes, 2019
The trilobite order Harpetida has long been easily recognized but poorly understood. This study seeks to better understand the phylogenetic relationships within Harpetida, with a view towards using this group to explore the relationship between ...
Beech, James Desmond
core   +1 more source

Upper Marianian (Cambrian Series 2) trilobites from the Totanés–Noez area (Central Iberian Zone, Toledo province, Spain): systematics and intercontinental correlation [PDF]

open access: yes
Marianian (Cambrian Series 2) trilobites from the area between Totanés and Noez (Central Iberian Zone) are described and their biostratigraphical significance is discussed.
Chirivella Martorell, Juan Bautista   +5 more
core   +2 more sources

Trilobita [PDF]

open access: yes, 2020
Los trilobites fueron artrópodos marinos paleozoicos, provistos de una cutícula dorsal mineralizada (exoesqueleto) y fosilizable, la que permitió que tengan gran representación en el registro fósil.
Tortello, Marcelo Franco   +2 more
core  

Modularity of a Cambrian ptychoparioid trilobite cranidium [PDF]

open access: yes, 2011
Modularity of the cranidium of Crassifimbra? metalaspis , a Cambrian ptychoparioid trilobite, is investigated using landmark-based geometric morphometric methods to gain insight into the integration among morphogenetic processes responsible for shaping ...
Webster, Mark, Zelditch, Miriam Leah
core   +1 more source

Systematics, paleobiology, and taphonomy of some exceptionally preserved trilobites from Cambrian Lagerstätten of Utah [PDF]

open access: yes, 2011
Mid-Cambrian biotas of the Spence, Wheeler, Marjum, and Weeks formations in Utah are exceptionally diverse. Continued collecting has produced additional trilobites here assigned to one new genus, Meniscopsia, and 25 new species.
Babcock, Loren E., Robison, Richard A.
core   +2 more sources

M.A.P.S. Digest, vol.10 no.2 (February 1987) [PDF]

open access: yes, 1987
https://ir.uiowa.edu/midamericapaleo/1076/thumbnail ...
Mid-America Palentology Society
core   +1 more source

028-Taxonomy and Preservation of Lower Cambrian Trilobites, Carrara Formation, Southern CA [PDF]

open access: yes
Trilobites are an extinct group of arthropods made up of three distinct body parts produced by calcite that disarticulate after molting. Trilobites lived in shallow, tropical, marine environments and left an excellent fossil record. The Cambrian is known
Torres Lopez, Reydaliz
core  

Los trilobites del Cámbrico y Ordovícico en el estado de Sonora, México: su diversidad sistemática, su status en el contexto mundial y sus implicaciones paleogeográficas [PDF]

open access: yes, 2011
En el estado de Sonora, ubicado en la región noroeste de México, están expuestas secuencias sedimentarias cuya edad varía desde el Proterozoico tardío hasta el Reciente.
Almazán Vázquez, E.   +2 more
core  

Rapid volcanic ash entombment reveals the 3D anatomy of Cambrian trilobites [PDF]

open access: yes
Knowledge of Cambrian animal anatomy is limited by preservational processes that result in compaction, size bias, and incompleteness. We document pristine three-dimensional anatomy of trilobites fossilized via rapid ash burial from a pyroclastic flow ...
Azizi, Abdelfattah   +14 more
core   +3 more sources

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