If you need an accessible version of this item please contact JSTOR User Support

Pseudocoelomates and a Nemertine from the Illinois Pennsylvanian

Frederick R. Schram
Journal of Paleontology
Vol. 47, No. 5 (Sep., 1973), pp. 985-989
Stable URL: http://www.jstor.org/stable/1303083
Page Count: 7
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
Pseudocoelomates and a Nemertine from the Illinois Pennsylvanian
Preview not available

Abstract

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.

Page Thumbnails

  • Thumbnail: Page 
985
    985
  • Thumbnail: Page 
986
    986
  • Thumbnail: Page 
987
    987
  • Thumbnail: Page 
988
    988
  • Thumbnail: Page 
[unnumbered]
    [unnumbered]
  • Thumbnail: Page 
[unnumbered]
    [unnumbered]
  • Thumbnail: Page 
989
    989