Browsing Smithsonian Contributions to Paleobiology by Author "Yochelson, Ellis L."

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Middle Proterozoic (1.5 Ga) Horodyskia moniliformis Yochelson and Fedonkin, the Oldest Known Tissue-Grade Colonial Eucaryote

Fedonkin, Mikhail A.; Yochelson, Ellis L. (2002)

“Problematic bedding-plane markings” discovered by the late R.J. Horodyski from the Appekunny Formation in Glacier National Park, Montana, and dated at approximately 1.5 giga-annum (Ga), were never formally named. We are ...
Paleobiology of Climactichnites, an Enigmatic Late Cambrian Fossil

Yochelson, Ellis L.; Fedonkin, Mikhail A. (1993)

Climactichnites wilsoni Logan, 1860, is redescribed from field investigations and specimens in various museums. Climactichnites youngi Todd, 1882, and C. fosteri Todd, 1882, are placed in synonymy. The ...

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