Rhynchonellata - Spiriferida - Spiriferidae
Alternative spelling: Delthyris (Spirifer)
Full reference: J. Sowerby. 1818. No. XXX in the mineral conchology of Great Britain; or colored figures and descriptions of those remains of testaceous animals or shells, which have been preserved at various times and depths in the Earth. The mineral conchology of Great Britain 3:1-194
Parent taxon: Spiriferinae according to A. Williams et al. 2006
Sister taxa: Ectochoristites, Larispirifer, Latispirifer, Warsawia
Subtaxa: Spirifer acutiplicatus, Spirifer bambadhurensis, Spirifer baschkirica, Spirifer battu, Spirifer battus, Spirifer bistritzae, Spirifer bisulcatus, Spirifer byrangi, Spirifer concentricus, Spirifer crebristria, Spirifer distefanii, Spirifer dvinaensis, Spirifer enderlei, Spirifer engelgardthi, Spirifer fayettevillensis, Spirifer holodnensis, Spirifer lirellus, Spirifer malistanensis, Spirifer octoplicatus, Spirifer opimus, Spirifer pentagonoides, Spirifer pentlandi, Spirifer piassinaensis, Spirifer postventricosus, Spirifer pseudotasmaniensis, Spirifer rakuszi, Spirifer rockymontanus, Spirifer schellwieni, Spirifer siculus, Spirifer spitiensis, Spirifer subgrandiformis, Spirifer subtrigonalis, Spirifer supracarbonicus, Spirifer supramosquensis, Spirifer tareiaensis, Spirifer undata, Spirifer uralicus
Ecology: stationary epifaunal suspension feeder