Results 81 to 90 of about 6,764 (250)
Middle Ordovician conodonts and graptolites at Los Cauquenes range, central Precordillera of San Juan, Argentina [PDF]
, 2013 The Ordovician System is superbly represented in the Precordillera of western Argentina, at the Andean foothills. During the Middle Ordovician, an important paleogeographical rearrangement of depocenters and source areas took place associated with the ...
Albanesi, Guillermo Luis +2 more
core
Papers in Palaeontology, Volume 10, Issue 5, September/October 2024.Abstract New Floian and early middle Darriwilian brachiopod assemblages of the San José Formation of the Eastern Cordillera of Peru are presented. A new genus and species, Apurimella santiagoi, and two new species, Phragmorthis henrylunae and Nocturnellia ashaninka, are described.
Jorge Colmenar +2 more
wiley +1 more source
Malongitubus: a possible pterobranch hemichordate from the early Cambrian of South China [PDF]
, 2017 Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence
Erdtmann, Bernd-Dietrich +6 more
core +1 more source
The many ways toward punctuated evolution
Palaeontology, Volume 67, Issue 5, September/October 2024.Abstract Punctuated equilibria is a theory of evolution that suggests that species go through periods of stability followed by sudden changes in phenotype. This theory has been debated for decades in evolutionary biology, but recent findings of stasis and punctuated change in evolutionary systems such as tumour dynamics, viral evolution, and artificial
Salva Duran‐Nebreda +6 more
wiley +1 more source
High palaeolatitude (Hodh, Mauritania) recovery of graptolite faunas after the Hirnantian (end Ordovician) extinction event [PDF]
Marine shales directly overlying lower Hirnantian (uppermost Ordovician) glacially related sediments in Mauritania (North-West Africa) have produced a rich graptolite fauna spanning the Ordovician-Silurian boundary in an area of high palaeolatitude.
Deynoux, M. +2 more
core
RNames, a stratigraphical database designed for the statistical analysis of fossil occurrences : the Ordovician diversification as a case study [PDF]
, 2017 RNames (rnames.luomus.fi/) is an open access relational database linking stratigraphic units with each other that are considered to be time-equivalent or time overlapping. RNames is also a tool to correlate among stratigraphic units. The structure of the
Kröger, Björn, Lintulaakso, Kari
core +1 more source
, 2015 . New graptolite-trilobite records provide relevant information for the biostratigraphic framework of the lower Paleozoic in western Gondwana. Aorograptus victoriae (T. S. Hall), together with Adelogratus cf. A.
B. A. Toro +4 more
semanticscholar +1 more source
Papers in Palaeontology, Volume 10, Issue 3, May/June 2024.Abstract The documentation of cuticular micro‐ornament is vital for the taxonomic assignment of palaeoscolecids: vermiform lower Palaeozoic ecdysozoans interpreted as stem‐group priapulans or early diverging panarthropods. This is due to the absence of the character‐rich proboscis and tail hooks in palaeoscolecid material not from Burgess Shale‐type ...
Richard J. Howard +4 more
wiley +1 more source
Geologica Acta, 2009 Outcrops on the western slope of the La Invernada Range, San Juan Precordillera (W Argentina), were surveyed for lithofacial analysis and graptolite-conodont high resolution biostratigraphy.
G. ORTEGA +3 more
doaj
An image dataset of fusulinid foraminifera generated with the aid of deep learning
Geoscience Data Journal, Volume 11, Issue 1, Page 46-56, January 2024.The first large image set of fusulinid foraminifera, containing 2,400 images of individual fossils covering all six fusulinid families, has been generated by an auto‐segmentation procedure. The procedure successfully segmented fusulinid individual images from literature figures and fossil thin‐slice photos with a deep learning technique (BlendMask ...
Hanhui Huang +7 more
wiley +1 more source