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E. L. Yochelson

Publications and source records attributed to E. L. Yochelson.

15 recordsLinked to original sources
USGS2015

Recognition of Macluritella (Gastropoda) from the Upper Cambrian of Missouri and Nevada

Open-coiled euomphalacean gastropods have been identified for the first time in the Upper Cambrian Eminence Dolomite of Missouri. These gastropods have a triangular whorl profile and are conspecific with Hyolithes walcotti described from the Upper Cambrian of Nevada. That species is questionably reassigned to the gastropod genus Macluritella , hitherto known only from the Lower Ordovician of Colorado.

Journal of Paleontology↗
USGS1999

Dr. Cooper Curtice - Unknown worker in interpreting the Cambrian of Alabama

Cooper Curtice was an assistant to C. D. Walcott from 1883-1886. In 1885, he spent four months, mostly in Alabama, measuring sections of Paleozoic rocks and searching for fossils, mainly in the Cambrian. In 1888, Walcott concurred with foreign authorities that the rocks called Middle Cambrian in North America were Early Cambrian in age and vice versa, requiring a new interpretation of Cambrian strata. Curtice returned to Alabama for geologic investigations in 1892, and again briefly with Walcott in 1895. Since that time Cambrian stratigraphy in the southeastern United States has remained virtually unchanged.

Southeastern Geology↗
USGS1984

Reevaluation of the systematic position of Scenella

Specimens originally illustrated from Lower Cambrian rocks of the Sierra Morena in Badajoz and Sevilla Provinces, southwestern Spain are supplemented by new material from another locality and are described as Scenella morenensis n. sp. Although Scenella was originally considered to be a patelliform gastropod, for three decades now the genus has been classified as a monoplacophoran. The type species of Scenella, S. reticulata Billings, does not show any paired muscles scars, nor does this new species; such scars are indicative of the Monoplacophora. This new species of Scenella does exhibit features which suggest assignment to the chondrophorine coelenterates. If so, Scenella cannot represent the ancestral form of mollusk.

Sierra Morena in Badajoz and Sevilla Provinces, so↗
USGS1979

Images of the U.S. Geological Survey, 1879-1979

This collection of photographs reflects 100 years of public service by the U.S. Geological Survey since its founding on March 3, 1879: "... for the classification of the public lands, and examination of the geological structure, mineral resources, and products of the national domain."

Report↗
USGS1964

Paleozoic mollusk: Hyolithes

An unusually well-preserved Ordovician fossil from Czechoslovakia shows that the enigmatic paired structures once thought to be outgrowths of the operculum of Hyolithes are really independent structures lying between the operculum and the aperture of the shell. The find seems to provide conclusive proof of the morphologic uniqueness of hyolithids.

Science↗