Tergomya - Tryblidiida - Tryblidiidae
Full reference: E. O. Ulrich and W. H. Scofield. 1897. The Lower Silurian Gastropoda of Minnesota. The Paleontology of Minnesota 39(2):813-1081
Parent taxon: Tryblidiinae according to G.P. Wahlman 1992
See also Knight and Yochelson 1960, Runnegar and Jell 1976, Sepkoski 2002 and Starobogatov 1970
Subtaxa: Helcionopsis depressum Helcionopsis radiatum Helcionopsis reticulatus Helcionopsis striata Helcionopsis subcarinata Helcionopsis wisconsinensis
Type: Helcionopsis striata
Ecology: epifaunal grazer
Distribution:
• Ordovician of United States (19: Illinois, Iowa, Minnesota, Missouri, Ohio, Tennessee collections)
Total: 19 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.