Rhynchonellata - Orthida - Giraldiellidae
Full reference: A. Williams, S. J. Carlson, C. H. C. Brunton, L. E. Holmer, L. E. Popov, M. Mergl, J. R. Laurie, M. G. Bassett, L. R. M. Cocks, J.-Y. Rong, S. S. Lazarev, R. E. Grant, P. R. Racheboeuf, Y.-G. Jin, B. R. Wardlaw, D. A. T. Harper, and A. D. Wright and M. 2000. Part H Brachiopoda (revised): Volumes 2 & 3, Linguliformea, Craniiformea, Rhynchonelliformea (part). Treatise on Invertebrate Paleontology 1-919
Parent taxon: Plectorthoidea according to A. Williams et al. 2000
See also Benedetto 2003
Sister taxa: Apatoskenidioides, Chilcorthidae, Cremnorthidae, Cyclocoeliidae, Eoorthidae, Euorthisinidae, Finkelnburgiidae, Lebediorthis, Nanorthidae, Phragmorthidae, Platystrophiidae, Plectorthidae, Ranorthidae, Rhactorthidae, Tasmanorthidae, Wangyuiidae
Subtaxa: Comatopoma Famatinorthis Gelidorthina Gelidorthis Giraldiella Kvania Phaceloorthis Proteorthis Scaphorthis Tazzarinia
Type: Giraldiella
Ecology: stationary epifaunal suspension feeder
Distribution:
• Silurian of Argentina (1 collection), Czechia (6), Kazakhstan (1), the United Kingdom (4)
• Dobrotivian of Portugal (1), Spain (2)
• Liben of Czechia (1)
• Arenig of Argentina (4)
• Arenigian of Argentina (3), United States (2: Maine)
• Ordovician of Argentina (5), Australia (12), Austria (1), Bolivia (1), Canada (3: British Columbia), China (1), Czechia (9), Germany (1), Ireland (1), Kazakhstan (6), Morocco (3), Norway (6), Portugal (3), Spain (10), Sweden (1), Türkiye (1), the United Kingdom (26), United States (12: Alaska, California, Nevada, Pennsylvania, Virginia)
• Cambrian of Argentina (2)
Total: 129 collections including 143 occurrences