IODP SEDIS - Thesaurus -

Spiriferida
BT	Invertebrata
	.Brachiopoda
	..Articulata
	...Spiriferida
NT	Atrypidae
	Cyrtospirifer
	Spiriferidina

Spiriferidae
BT	Invertebrata
	.Brachiopoda
	..Articulata
	...Spiriferida
	....Spiriferidina
	.....Spiriferidae
SN	Family.