Results 61 to 70 of about 430 (137)

Evidences for a Paleocene marine incursion in southern Amazonia (Madre de Dios Sub-Andean Zone, Peru) [PDF]

open access: yes, 2014
This article presents new biostratigraphic dating, facies analysis, organic geochemical data and Nd–Sr isotopic provenance from five outcrops of southern Amazonia (MD-85, MD-177 MD-184, MD-255 and MD-256) to document for the first time the presence of a ...
Adnet, S.   +12 more
core   +3 more sources

History of two lineages: Comparative analysis of the fossil record in Amiiformes and Pycnodontiformes (Osteischtyes, Actinopterygii) [PDF]

open access: yes, 2013
Amiiformes and pycnodontiformes are two orders of neopterygian fishes that were broadly distributed, and frequently appeared together, during the Mesozoic. Comparison of their fossil record reveals both common traits and significant differences.
Martín-Abad, Hugo   +1 more
core  

The oldest stratigraphic record of the Late Cretaceous shark Ptychodus mortoni Agassiz, from Vallecillo, Nuevo León, northeastern Mexico

open access: yesRevista Mexicana de Ciencias Geológicas, 2018
The comments by Stinnesbeck et al. (2007) to our manuscript (Blanco-Piñón et al., 2007) refer to four main points: • Stinnebeck et al. (2007) question the validity of the FCT acronym that we used for our description of the specimen of Ptychodus mortoni ...
Alberto Blanco-Piñón   +1 more
doaj  

Presencia de pycnodontiformes en el cretáceo inferior de colombia

open access: yes, 1970
It is the first time that the existence of a Pycnodontidae which can be approximately attributed to Macromesodon Couloni (Agassiz) is described in Colombia. The age would correspond to the Barremian-Aptian. C'est la première fois qu'on décrit l'existence d'un Pycnodontiforme en Colombie et qu'on peut tentativement attribuer à Macromesodon Couloni ...
openaire   +1 more source

Alternating regimes of shallow and deep-sea diversification explain a species-richness paradox in marine fishes. [PDF]

open access: yesProc Natl Acad Sci U S A, 2022
Miller EC   +5 more
europepmc   +1 more source

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