JSTOR Daily

Juliformian Millipedes from the Lower Devonian of Euramerica: Implications for the Timing of Millipede Cladogenesis in the Paleozoic

This is a preview. Log in through your library . Abstract Two new xyloiuloid millipedes (Diplopoda: Chilognatha: Juliformia) are described and placed in the new family Gaspestriidae: Gaspestria ...
JSTOR Daily

The Evolutionary History of Shell Geometry in Paleozoic Ammonoids

This is a preview. Log in through your library . Abstract Tracking the geometry of all 597 ammonoid genera from the Lower Devonian into the Lower Triassic, a 145-Myr period that spans three mass ...
Nature

Symbiotic Relationships in Paleozoic Marine Organisms

Paleozoic marine ecosystems were marked by a diverse array of symbiotic interactions that have left a lasting imprint on the evolutionary history of life. These associations, ranging from mutualistic ...
insider.si.edu

Charles D. Walcott Collection,1851-1940 and undated

Materials are from the Charles Walcott Collection, and include field notes, photographs, sketches and stratagraphic sections detailing Walcott's observations and work in geology and paleontology, ...
insider.si.edu

Pre-devonian paleozoic formations of the cordilleran provinces of Canada

Walcott, Charles D. 1923. "Pre-devonian paleozoic formations of the cordilleran provinces of Canada." Smithsonian Miscellaneous Collections, 75, (5) 174–377.