†subfamily Tretorhynchinae Williams et al. 2002 (lamp shell)
Rhynchonellata - Rhynchonellida - Rhynchoporidae
Full reference: A. Williams, C. H. C. Brunton, S. J. Carlson, F. Alvarez, R. B. Blodgett, A. J. Boucot, P. Copper, A. S. Dagys, R. E. Grant, Y.-G. Jin, D. I. MacKinnon, M. O. Mancenido, E. F. Owen, J.-Y. Rong, N. M. Savage and D.-L. Sun. 2002. Part H Brachiopoda (revised): Volume 4, Rhynchonelliformea (part). Treatise on Invertebrate Paleontology 921-1688
Parent taxon: Rhynchoporidae according to A. Williams et al. 2002
Sister taxa: Araratellinae, Greirinae, Rhynchoporinae
Subtaxa: Tretorhynchia
Type: Tretorhynchia
Ecology: stationary epifaunal suspension feeder
Distribution: found only at Gleniff outlier, Donegal Bay, Sligo (Carboniferous of Ireland)