Rhynchonellata - Orthida - Harknessellidae
Parent taxon: Dalmanelloidea according to A. Williams et al. 2000
See also Hints 1975 and Wright 1964
Sister taxa: Angusticardiniidae, Dalmanellidae, Dicoelosiidae, Heterorthidae, Hypsomoniidae, Kayserellidae, Mystrophoridae, Paurorthidae, Platyorthidae, Portranellidae, Proschizophoriidae, Rhipidomellidae, Tyronellidae
Subtaxa: Harknessella Haymina Horderleyella Isabelella Kampella Reuschella Smeathenella
Type: Harknessella
Ecology: stationary epifaunal suspension feeder
Distribution:
• Silurian of Norway (11 collections), the United Kingdom (1)
• Dobrotivian of Spain (3)
• Ordovician of Argentina (2), Belgium (1), China (10), Czechia (2), Estonia (37), Ireland (1), Latvia (2), Lithuania (13), Morocco (1), Norway (1), Peru (2), Portugal (2), the Russian Federation (17), Spain (3), Sweden (4), the United Kingdom (85), United States (3: Virginia)
Total: 201 collections including 210 occurrences