Barbarodina grandis Stauffer, 1935

1935 Barbarodina grandis n. sp. - Stauffer, pag. 603, Plate 73, fig. 6, 8.

Original description - Base or bar thick, tapering gradually to posterior; Under side with broad excavation which begins at the posterior end, extends forward, widens into the cavity beneath the cusp, extends downward into tapering sub-basal projection of cusp. A highly arched plate forms upper boundary of cavity, extends from dental bar to sub-basal portion of cusp; 4 to 6, possibly more, subequal denticles extending along the bar, inclined slightly to posterior. Cusp moderately to strongly curved, sharply keeled along inner edge.

Occurrence - Lower part of the Decorah Shale, along county road 2,5 miles NW of Spring Grove, Minnesota; Mississippi River bluff, 4,5 feet above base of the Decorah Shale, Ford Bridge, Minneapolis, Minnesota, U. S. A. (Stauffer, 1935).

Age range - Ordovician (Stauffer, 1935).

Syntypes - B 4580; B 4582; Geological Museum, University of Minnesota.

References:

- Stauffer, C. R. (1935) - The conodont fauna of the Decorah Shale (Ordovician). Journal of Paleontology, vol. 9(7): pp. 596-620.