Rhynchonellata - Atrypida - Glassiidae
Parent taxon: Glassioidea according to A. Williams et al. 2002
Sister taxa: none
Subtaxa: Glassia Karbous Nanatrypa Peratos Trigonatrypa
Type: Glassia
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of Afghanistan (1 collection), Australia (1), Austria (1), Canada (8: Northwest Territories, Yukon), China (11), the Czech Republic (12), Morocco (2), Poland (4), United States (2: Nevada)
• Clinton of Canada (4: British Columbia)
• Silurian of Australia (1), Belarus (1), Canada (17: Northwest Territories, Nunavut, Yukon, Yukon Territory), China (1), the Czech Republic (2), Estonia (1), Lithuania (12), Mongolia (2), Norway (4), Sweden (1), the United Kingdom (22), United States (3: California, Nevada)
Total: 113 collections including 134 occurrences