Results 91 to 100 of about 10,320 (217)

Appendages of the Trilobite [PDF]

open access: yesScience, 1884
Mode of access: Internet.
openaire   +2 more sources

Trilobites and intercontinental tie points in the Upper Cambrian of Scandinavia [PDF]

open access: yes, 2003
The Upper Cambrian faunas of Scandinavia are generally dominated by olenid trilobites, which provide a firm basis for the biostratigraphic classification. The olenids tend, however, to be provincial and facies controlled.
Ahlberg, P.
core   +3 more sources

Late Middle Cambrian agnostid trilobites from the Gunns Plains area, north-western Tasmania [PDF]

open access: yes, 1976
Ten species of agnostid trilobites, including a new species, Utagnostus(?) nevel, are described from two localities within the lower sedimentary succession of the Radfords Creek Group, Dial Range Trough, north-western Tasmania.
Jago, JB
core   +2 more sources

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  

Upper Ordovician cryptostomatid bryozoans and microfossils from the Don Braulio Formation, Eastern Precordillera, Argentina [PDF]

open access: yes, 2014
En la clásica sección de la Quebrada de Don Braulio, en la Precordillera Oriental de la Provincia de San Juan, afora la Formación Don Braulio de edad hirnantiana.
Beresi, Matilde Sylvia   +3 more
core  

Trilobites del Ordovícico Medio del sector meridional de la zona Centroibérica española. Parte I: Yacimientos, bioestratigrafía y aspectos paleobiogeográficos. [PDF]

open access: yes, 1989
El presente trabajo constituye el prólogo de un estudio sistemático detallado acerca del conjunto de trilobites ordovícicos registrados en las "Capas con Tristanl" (Llanvirn-Dobrotiviense) de la zona Centroibérica del Macizo Hespérico.
Rábano, Isabel
core  

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

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