Figure 3. Mississippian (and one Ordovician and Pennsylvanian,
K and F) fossils from Missouri.
A, B, D, E: Dorsal spines and teeth of sharklike fishes,
St. Louis Limestone, St. Louis area.
A, B: Ctenacanthus, spines.
C: Globoblastus, a chert steinkern of a common Missouri
Mississippian blastoid, Burlington Formation, Hannibal.
D: Cladotus; E: Polyrhizodus, teeth.
F: Temnocheilus sp., "spiked," coiled cephalopod
from mollusk-bearing Pennsylvanian strata, St. Louis Co.
G: Crinoid calyx with hole possibly made by bite of sharklike
fish such as Cladotus, Warsaw Formation, Lincoln Co.
H: Spirifer sp., internal mold of a common Missouri fossil
preserved in chert, Burlington Formation, Fulton.
I: Archimedes worthina, the spiral support of a lacy bryozoan
common in the Warsaw Formation, Moscow Mills, Lincoln Co.
J, L: Crinoid calyx and coiled stem, Keokuk Limestone, Springfield.
M: Melonechinus sp., a "primitive" sea urchin, St. Louis Limestone,
St. Louis area.
N: Lovenechinus missouriensis, a "primitive" Paleozoic echinoid
from Osagianage strata of southwest Missouri.
K: Pionodema subaequata, a common brachiopod in the
Middle Ordovician, Decorah Formation, Jefferson Co.
Figure 1 Figure 2 Figure 3 Figure 4
Publication: Missouri Fossils
Missouri Fossils: Menu
By: Bruce Stinchcomb