ammonites
Virgaspongia ichnata Rigby and Manger 1994 (demosponge)

Demospongea - Orchocladina - Anthaspidellidae

Full reference: J. K. Rigby and W. L. Manger. 1994. Morrowan lithistid demosponges and hexactinellids from the Ozark Mountains of northwestern Arkansas. Journal of Paleontology 68(4):734-746

Belongs to Virgaspongia according to J. K. Rigby and W. L. Manger 1994

Sister taxa: none

Type specimen: Its type locality is Arnett, which is in a Morrowan marine shale in the Bloyd Formation of Arkansas

Ecology: stationary epifaunal suspension feeder