Phosphoria conodonts from southeastern Idaho

Very little information is available in regard to Permian conodonts. Three small collections from the Phosphoria formation of southeastern Idaho provide the basis for the present report. The specimens are poorly preserved and the variety is not great. However, the genera Gondolella, Prioniodus? and Streptognathodus are represented. Three new species are established-two of them belong in Gondolella, the dominant genus in the collections, and one in Streptognathodus. Because of the general lack of other described Permian conodonts, no precise correlations of the Phosphoria can be suggested on the basis of these fossils alone. However, their evolutionary stage, together with the associated faunas, including the edestid shark Helicoprion, suggest a Middle Permian age for the formation. DURING the summer of 1949, a study was made of certain of the Paleozoic formations of Idaho south of the Snake River Plain. Special consideration was given to the possible microfossil content of these strata. The Phosphoria formation was sampled at several localities in the Caribou, Bear River, and Preuss ranges. Conodonts were secured at two localities in the Preuss Range and at a single locality in the Bear River Range. Altogether, more than 100 specimens were collected, many of which are only fragments. These conodonts are not well preserved and their variety is not great. Fifteen specimens, which represent the more nearly complete individuals, as well as the several genera and species which occur in the collections, are illustrated and