Results 61 to 70 of about 97,949 (319)

A nação pela pedra: coleções de paleontologia no Brasil, 1836-1844 Petrifying the nation: paleontology collections in Brazil, 1836-1844

open access: yesHistória, Ciências, Saúde: Manguinhos, 2012
A formação e o estudo de coleções de história natural e de paleontologia participaram da instauração da ordem política do Império do Brasil, delineando também uma ordem científica. A simbiose entre ciência e nação encontrou em Peter W.
Paulo Henrique Martinez
doaj   +1 more source

A Titanothere from the Type Sespe of California [PDF]

open access: yes, 1938
In previous papers [1], published mostly in these PROCEEDINGS, have appeared some of the paleontological results of explorations conducted in the Sespe deposits of Southern California.
Stock, Chester
core  

New material of Alierasaurus ronchii (Synapsida, Caseidae) from the Permian of Sardinia (Italy), and its phylogenetic affinities [PDF]

open access: yes, 2017
New characters of the giant caseid Alierasaurus ronchii are described here based on material recovered from the type locality in the Permian deposits of Cala del Vino Formation (Sardinia NW) and additional preparation of the previously collected ...
Maganuco, Simone   +3 more
core   +1 more source

Trabecular bone ontogeny of the human talus

open access: yesThe Anatomical Record, EarlyView.
Abstract Studies of trabecular ontogeny may provide insight into the factors that drive healthy bone development. There is a growing understanding of how the juvenile skeleton responds to these influences; however, gaps in our knowledge remain. This study aims to identify ontogenetic trabecular patterns and regional changes during development within ...
Rebecca A. G. Reid   +2 more
wiley   +1 more source

Quo Vadis, Paleontology?

open access: yesPhilosophy, Theory, and Practice in Biology
Studies of the history of life provide an interesting case study of how the questions scientists can ask, and from which they expect reliable answers, change over time.
Douglas Erwin
doaj   +2 more sources

Issues of paleontology, stratigraphy and historical geology in the treatise of N. Stenon «On the solid, naturally contained in the solid»

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
The 350th anniversary of the publication of Nicholas Stenon's treatise «On the solid, naturally contained in the solid» is marked in 2019. This work proves possibility of interpretation of spatial relations of layers of rocks from the point of view of ...
L. V. Novgorodova   +3 more
doaj   +1 more source

A reappraisal of the Italian record of the Cretaceous pachycormid fish Protosphyraena Leidy, 1857 [PDF]

open access: yes, 2017
The genus Protosphyraena is known mainly from partial remains, consisting of isolated blade-like teeth, conical rostra and scythe-like pectoral fins. This paper provides a new insight into partial specimens of the genus Protosphyraena from the Cretaceous
Amalfitano, Jacopo   +3 more
core   +3 more sources

Ontogenetic changes and sexual dimorphism in the cranium and mandible of the Atlantic walrus (Odobenus rosmarus rosmarus L.)

open access: yesThe Anatomical Record, EarlyView.
Abstract Walruses have been an important subsistence and cultural resource for humans and have been exploited for millennia across their distribution. This exploitation has contributed to severe declines in several populations and local extirpations.
Katrien Dierickx   +6 more
wiley   +1 more source

When are Fossils Data?

open access: yesPhilosophy, Theory, and Practice in Biology
Existing accounts of data are unclear about whether the epistemic role objects play makes them data, or whether data have to be produced by human interaction with the world – these two features can come apart.
Aja Watkins
doaj   +2 more sources

The revision of baphetids from the Middle Pennsylvanian of the Czech Republic: Morphology, ontogeny, palaeoecology, and the reassessment of the phylogeny of Baphetoidea

open access: yesThe Anatomical Record, EarlyView.
Abstract The baphetoids represent a clade of the Carboniferous stem‐tetrapods (Middle Mississippian—Middle Pennsylvanian) with a characteristic extension of the orbits into antorbital vacuities, which formed keyhole‐shaped openings on the skull. The more derived baphetids were crocodile‐like piscivores frequently occurring in coal‐bearing lacustrine ...
Pavel Barták, Martin Ivanov, Boris Ekrt
wiley   +1 more source

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