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: Dielasmatoidea according to A. Williams et al. 2006
Sister taxa: Adygellopsis, Angustothyrididae, Antzeilleridae, Athyrorhynchia, Beecheriidae, Dielasmatidae, Heterelasminidae, Juvavellidae, Paradygella, Proanadyrella, Pseudodielasmatidae, Pseudoharttina, Pseudopygoides, Thyratryaria, Zugmayeriidae, Aulacothyroideidae
Subtaxa: Gillediinae Hemiptychininae Mongolina
Type: Gilledia
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Triassic of China (2 collections)
• Permian of Afghanistan (1), Armenia (3), Australia (103), Azerbaijan (1), Canada (2: Nunavut, Yukon), China (32), India (2), Indonesia (1), Iran (12), Italy (2), Laos (1), Nepal (3), New Zealand (17), Oman (29), Pakistan (153), the Russian Federation (9), Saudi Arabia (1), Slovenia (1), Tajikistan (2), Thailand (9), Ukraine (2), United States (30: Nevada, New Mexico, Texas, Utah, Wyoming), Venezuela (3)
• Carboniferous of Australia (13), China (1), Libya (2), the United Kingdom (2)
Total: 439 collections including 557 occurrences