†Helcionopsis depressum Ulrich and Scofield 1897 (mollusk)
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Tergomya - Tryblidiida - Tryblidiidae
Alternative combination: Platyceras depressum
Full reference: E. O. Ulrich and W. H. Scofield. 1897. The Lower Silurian Gastropoda of Minnesota. The Paleontology of Minnesota 39(2):813-1081
Belongs to Helcionopsis according to P. J. Wagner 2023
See also Ulrich and Scofield 1897
Sister taxa: Helcionopsis radiatum, Helcionopsis reticulatus, Helcionopsis striata, Helcionopsis subcarinata, Helcionopsis wisconsinensis
Ecology: epifaunal grazer
Distribution:
• Ordovician of United States (10: Illinois, Iowa, Minnesota collections)
Total: 10 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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