†Leoniorthis Egerquist 2003 (lamp shell)
Rhynchonellata - Orthida - Orthidae
Full reference: E. Egerquist. 2003. New brachiopods from the Lower-Middle Ordovician (Billingen-Volkhov stages) of the East Baltic. Acta Palaeontologica Polonica 48(1):31-38
Parent taxon: Orthidae according to E. Egerquist 2003
Sister taxa: Diochthofera, Orthambonites, Orthinae, Orthis, Orthostrophella, Orthostrophia, Paralenorthis, Sinorthis, Sivorthis, Sulcatorthis, Sulevorthis, Suriorthis, Taphrorthis, Trondorthis
Subtaxa: none
Ecology: stationary epifaunal suspension feeder