Results 61 to 70 of about 809 (126)

Moulting in Ordovician dalmanitoid and acastoid trilobites of the Prague Basin. Preliminary observation

open access: yesGeologica Acta, 2005
A review of the supposed moulting positions of the Bohemian Ordovician dalmanitoid and acastoid trilobites is presented. Five main moulting positions are described, but some combinations of these are also widespread.
P. Budil, J. Bruthansová
doaj   +1 more source

Type Specimens of the Species of the Genus Papillicalymene (Arthropoda, Trilobita) from Ukraine Described by Leonid Konstantynenko

open access: yesZoodiversity
The article presents diagnoses and information on the type series of two trilobite species of the genus Papillicalymene Shirley, 1936: P. dnistroviana Konstantynenko, 2006 and P. sokoliana Konstantynenko, 2006 from the Ludlow (Upper Silurian) of Podillia
V. Dernov
doaj   +1 more source

Review of the Cambrian Stratigraphy of the Argentine Precordillera

open access: yesGeologica Acta, 2003
The Cambrian rocks of the Argentine Precordillera are analyzed and updated providing a new stratigraphic interpretation. The lithostratigraphic assemblages provide evidence that the Precordilleran Cambrian Basin was a rimmed platform.
O. Bordonaro
doaj   +1 more source

Hábitos de Vida da Associação “Schuchertella”agassizi – Pthychopteria eschwegei, Formação Maecuru,Devoniano, Bacia do Amazonas, Brasil. [PDF]

open access: yesAnuário do Instituto de Geociências, 2007
The fossils studied came from outcrops of the Maecuru and Curuá rivers, State of Pará, belonging to the upper strata of theMaecuru Formation, Eifelian age.
Luiza Corral Martins de Oliveira Ponciano   +1 more
doaj  

Trilobite compound eyes with crystalline cones and rhabdoms show mandibulate affinities

open access: yesNature Communications, 2019
Little is known about the internal anatomy of early eyes. Here, Scholtz and colleagues show the internal eye structures from fossils of two genera of trilobites, which support an ancestral apposition eye with crystalline cones in Trilobita and a close ...
Gerhard Scholtz   +2 more
doaj   +1 more source

A dynamic and collaborative database for morphogeometric information of trilobites. [PDF]

open access: yesSci Data, 2023
Serra F   +11 more
europepmc   +1 more source

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