Results 81 to 90 of about 3,769 (223)

Early cephalopod evolution clarified through Bayesian phylogenetic inference. [PDF]

open access: yesBMC Biol, 2022
Pohle A   +8 more
europepmc   +1 more source

Origination, diversity, and extinction metrics essential for analysis of mass biotic crisis events: An example from cretaceous ammonoidea [PDF]

open access: green
Traditional mass extinction research has predominently concentrated on statistically demonstrating that mass extinction intervals are significantly above background levels of familial and generic extinction in terms of extinction percentage, extinction ...
Christopher J. Collom
openalex   +2 more sources

Depositional sequences and ammonoid assemblages in the upper Cenomanian-lower Santonian of the Iberian Peninsula (Spain and Portugal) [PDF]

open access: yes, 2014
A clear relationship exists between eustatic sea-level rises and falls recorded as cyclical depositional sequences and ammonite faunas during the Cenomanian-Santonian in the Iberian and West Portuguese basins.
Barroso-Barcenilla, F.   +5 more
core   +5 more sources

Les Phylloceratoidea (Ammonoidea) aptiens et albiens du bassin vocontien (Sud-Est de la France) [Aptian and Albian Phylloceratids (Ammonoidea) from the Vocontian Basin (SE France)]

open access: yesCarnets de Géologie, 2008
More than 2,200 pyritized ammonites of the Superfamily Phylloceratatoidea have been collected in consonance with the scale of the ammonite zonation of the expanded Marnes Bleues Fm in the Vocontian Basin (SE France).
Joly Bernard, Delamette Michel
doaj  

The distribution of the ammonite Gravesia (Salfeld, 1913) in the Kimmeridge Clay Formation (Late Jurassic) in Britain [PDF]

open access: yes, 2010
Species of the ammonite Gravesia (Salfeld, 1913) have a widespread distribution in Europe over a relatively narrow stratigraphical range in the late Kimmeridgian and early Tithonian stages.
Etches, S.M., Gallois, R.W.
core  

Mesozoic stratigraphy and new Aptian cephalopods of el Vendrell, southwest of the Garraf Massif (Catalonia) [PDF]

open access: yes, 2016
En aquest treball es mostra l'estratigrafia del Mesozoic de l'extrem sud-oest del massís del Garraf i es dóna a conèixer per primera vegada una associació de cefalòpodes procedents de l'Aptià (Cretaci inferior) de l'entorn del municipi del Vendrell.
Albalat, David   +4 more
core  

Estudio bioestratigráfico (Ammonoidea) del Aaleniense y Bajociense en Asturias [PDF]

open access: yes, 1979
Se ha reconocido un conjunto de parámetros tafonómicos que están íntimamente relacionados con las condiciones de depósito y con los procesos de diagénesis temprana.
Fernández López, Sixto Rafael   +1 more
core   +2 more sources

Gerd E.G. Westermann (11.05.1927-5.11.2014) [PDF]

open access: yes, 2015
Fil: Riccardi, Alberto Carlos. División Paleozoología Invertebrados. Facultad de Ciencias Naturales y Museo.
Riccardi, Alberto Carlos
core  

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