Stenolaemata - Cryptostomata - Arthrostylidae
Parent taxon: Arthrostylidae according to J. R. P. Ross 1963
See also Bassler 1911, Bassler 1953 and Sepkoski 2002
Sister taxa: Arthroclema, Arthrostyloecia, Arthrostylus, Arthrotrypa, Cuneatopora, Glauconome, Glauconomella, Heloclema, Heminematopora, Hemiulrichostylus, Hexites, Moyerella, Nematopora, Nematoporella, Paracuneatopora, Permoheloclema, Pseudonematopora, Sceptropora, Ulrichostylus
Subtaxa: Helopora divaricata Helopora fragilis
Type: Helopora fragilis
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of United States (14: Indiana, Michigan, Ohio collections)
• Silurian of Belarus (1), Canada (4: Ontario), China (1), India (1), the Russian Federation (4), Sweden (2), the United Kingdom (3), United States (39: New York)
• Chazyan of Canada (2: Northwest Territories), United States (2: Vermont)
• Ordovician of Canada (7: Northwest Territories), Estonia (1), Spain (1), United States (31: Georgia, Indiana, Minnesota, New York, Ohio, Tennessee)
Total: 113 collections including 114 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.