Theodossia
hungerfordi
brachiopod
Devonian
Lime Creek Formation
Cerro Gordo Member
Rockford, Iowa
Associated fossils on this specimen
Colony of an auloporid coral and
Spirorbis sp. worm tubes
Reference: (Genus)
Invertebrate Fossils
Moore, Raymond C., Lalicker, Cedil G., & Fischer
1952
Pages 256-257 fig. 6a, 6b
Viewer Comments:
(small spiral gastropod-like fossils)
I am fairly certain they are Spirorbis sp. worm tubes.
See page 539 , National Audubon Society's Field Guide
to N. American Fossils. I am pleased to report that these
tiny, filter feeding tube worms are indeed alive and
well, as I have quite a number of them attached to the
glass and gastropod shells in my aquarium.
Phylum Annelida
Class Polychaeta
Order Sabellida
Family Serpulidae
Andrew Dunham