You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Pseudocoelomates and a Nemertine from the Illinois Pennsylvanian
Frederick R. Schram
Journal of Paleontology
Vol. 47, No. 5 (Sep., 1973), pp. 985-989
Published by: SEPM Society for Sedimentary Geology
Stable URL: http://www.jstor.org/stable/1303083
Page Count: 7
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Four species of soft bodied worms are described from the Mazon Creek area, Middle Pennsylvanian, of Illinois. They are assigned to four phyla, three at the pseudocoelomate grade of organization: Priapulida (Priapulites konecniorum), Nematoda (Nemavermes mackeei), and Chaetognatha (Paucijaculum samamithion); and to the phylum Nemertina (Archisymplectes rhothon). These Mazon Creek worms are very similar to their living relatives. The fossils display the ancient origins of these phyla which are now seen to have existed virtually unchanged since at least the Middle Pennsylvanian.
Journal of Paleontology © 1973 SEPM Society for Sedimentary Geology