Pennsylvanian invertebrates of the Mazon Creek Area, Illinois
Subtitle: the morphology and affinities of Tullimonstrum
By: Ralph Gordon Johnson -- and Eugene S. Richardson, Jr. --
Contributors: Richardson, Eugene Stanley, 1916- joint author.
Series: Fieldiana -- v. 12, no. 8; Field Museum of Natural History. Publication -- 1065; Publication (Field Museum of Natural History) -- 1065.
Publisher: Field Museum of Natural History
Published: 1969
Place of publication: [Chicago]
Subjects: Tullimonstrum.; Paleontology -- Pennsylvanian.; Paleontology -- Illinois.
Other titles: The morphology and affinities of Tullimonstrum; A Crinoid from the Pennsylvanian Essex Fauna of Illinois; Bandringa Rayi. a new Ctenacanthoid shark from the Pennsylvanian Essex Fauna of Illinois; Scorpionida: the holotype of Mazonia Woodiana Meek and Worthen