Rhynchonellata - Terebratulida - Gillediidae
Full reference: K. S. W. Campbell. 1965. Australian Permian terebratuloids. Bureau of Mineral Resources Geology and Geophysics Bulletin 68:3-146
Parent taxon: Gillediidae according to A. Williams et al. 2006
Sister taxa: Hemiptychininae, Mongolina
Subtaxa: Aneuthelasma Balanoconcha Bisolcatelasma Camarelasma Gilledia Lowenstamia Maorielasma Omanilasma Paragilledia Pyandzhelasma Tacinia
Type: Gilledia
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Permian of Afghanistan (1 collection), Australia (104), Canada (2: Nunavut, Yukon), China (5), Iran (12), Laos (1), Nepal (3), New Zealand (17), Oman (28), Pakistan (1), the Russian Federation (1), Saudi Arabia (1), Tajikistan (2), United States (21: New Mexico, Texas), Venezuela (3)
• Carboniferous of Australia (13), China (1), Libya (2), the United Kingdom (2)
Total: 220 collections including 238 occurrences