†Fortowensia Cope 1996 (clam)
Full reference: J. C. W. Cope. 1996. Early Ordovician (Arenig) bivalves from the Llangynog Inlier, South Wales. Palaeontology 39(4):979
Parent taxon: Modiomorphoida according to J. J. Sepkoski 2002
Sister taxa: Ananterodonta, Brahcylyrodesma, Carminodonta, Celtoconcha, Cycloconchacea, Dulcineaia, Eurymya, Junjagiana, Modiomorphoidea, Moridunia, Myoconchidae, Neofordilla, Plicatomorpha, Rimmyjmima, Tromelinodonta
Subtaxa: none
Ecology: stationary semi-infaunal suspension feeder