General abundance:
Common
Reference:
Journal of Paleontology September 1985
J.R. Anderson, R.D. Hoare and M.T. Sturgeon
The Pennsylvanian Gastropod Genera Orthonema
Meek and Worthen and Streptacis Meek
From the Appalachian Basin
v. 59 no. 5, p. 1019-1023
Plate on page 1022 figures 4-6
Viewer Comments:
The Orthonema chorda specimen
is correctly identified.
It is a very nice specimen also. This locality has excellent
preservation. It appears to have the same preservation as
the Labette Shale, found in St. Louis too.
Dr. John R. Anderson
Pennsylvanian Fossils of Missouri