Eucyrtidium sp. (cf. E. calvertense ?) |
| Hays, J.D., 1970. Stratigraphy and evolutionary trends of Radiolaria in North Pacific Deep-Sea Sediments. The Geological Society of America, Memoir 126: 185-218. |
| |
| Martin, G.C., 1904. Radiolaria. In: Clark, W.B., Eastman, C.R., Glenn, L.C., Bagg, R.M., Bassler, R.S., Boyer, C.S., Case, E.C. and Hollick, C.A. [eds.], Systematic Paleontology of the Miocene Deposits of Maryland: Baltimore. Maryland Geological Survey, Johns Hopkins Press, 447-459. |
| |
|
 |
|
