†subfamily Eoorthinae Walcott 1908 (lamp shell)
Strophomenata - Billingsellida - Billingsellidae
Parent taxon: Billingsellidae according to M. Rubel 1961
Sister taxa: Billingsella, Cymbithyris, Eosotrematorthis, Kozhuchinella, Saccogonum, Xenorthis
Subtaxa: none
Ecology: stationary epifaunal suspension feeder
Distribution: there are no occurrences of Eoorthinae in the database