Mazon Creek Fossil Fauna
Worm-like Animals
ribbon worms, roundworms, arrow worms, spoon worms, velvet worms, and fan worms
Archisymplectes rhoton - Schram 1973
Ribbon Worm
Two specimens of Archisymplectes rhoton, Milwaukee Public Museum P359782 and P26065.1
Archisymplectes rhoton - R.Rock collection
Priapulites konecniorum - Schram, 1973
Penis Worm
Priapulites konecniorum, MPM P359924.2 and P359924.1 (negative and positive halves).
Paucijaculum samamithion - Schram, 1973
Arrow Worm
Pit 11, Braidwood, IL - A.Young collection
Above right: an arrow worm attached to an Acanthotelson stimpsoni shrimp - J.Wittry collection, MC Fossil Fauna Figure 167.3
Caprinoscolex ellogimus - Jones and Thompson, 1977
Spoon Worm
Coprinoscolex ellogimus, Milwaukee Public Museum collection P25871.1
Coprinoscolex ellogimus, Pit 11, Braidwood, IL - A.Young collection, Figure 14.4 The Mazon Creek Fossil Fauna 2012.
Coprinoscolex ellogimus, Pit 11, Braidwood, IL (coal mining tipple area) - A.Young collection
Chicago Academy of Sciences collection (detail on right showing gut pellets)
Coprinoscolex ellogimus, showing digestive tract, Pit 11, Braidwood, IL - A.Young collection
Lobopodians
Ilyodes inopinata - Thompson and Jones, 1980
Velvet Worm
Ilyodes inopinata, J.Wittry collection
Carbotubulus waloszeki - Haug et al., 2012
Phylum Incertae sedis
Microconchus carbonarius - Murchison, 1839
Once mistakenly thought to be a spiraling polychaete worm tube, now a poorly understood form. It is typically found attached to foliage and otherwise woody remains (sometimes mollusk shells).
Microconchus carbonarius, Milwaukee Public Museum collection P25872
Microconchus carbonarius, Milwaukee Public Museum collection P30727.1
Microconchus carbonarius. on a Taeniophyllum latifolium thalloid, Milwaukee Public Museum collection P359202
Phylum Incertae sedis
Undescribed Genus and Species, Form A
Kielbasa Worm
This is the first of two forms of non-annelid worms originally assigned to Nemavermes mackeei, initially identified as a free-living, marine nematode (Schram, 1973).
The Field Museum collection
Undescribed Genus and Species, Form B
Pig-Pen Worm
This is the second of two forms of non-annelid worms originally assigned to Nemavermes mackeei (Schram, 1973).
J.Wittry collection, Figure 10.2 The Mazon Creek Fossil Fauna 2012 as Nemavermes mackeei.
Undescribed Genus and Species, Form C
Squiggly Worm
Above and below: undescribed non-annelid worm Form C, Mazon River, Morris, IL - A.Young collection
Undescribed non-annelid worm Form C, showing annulations and gut line details, Mazon River, Morris, IL - A.Young collection