Gwynioidea

Superregnum: Eukaryota
Cladus: Amorphea
Cladus: Obazoa
Cladus: Opisthokonta
Cladus: Holozoa
Cladus: Filozoa
Cladus: Choanozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Superphylum: Lophotrochozoa
Phylum: Brachiopoda
Subphylum: Rhynchonelliformea
Classis: Rhynchonellata
Ordo: Terebratulida
Superfamilia: Gwynioidea

Familia: Gwyniidae
Genus: Simpliciforma

Gwynioidea MacKinnon, 2006

Type genus: Gwynia King, 1859

• Williams, A.(†), Brunton, C.H.C., Carlson, S.J., Baker, P.G., Carter, J.L., Curry, G.B., Dagys, A.S.(†), Gourvennec, R., Hou, H.F., Jin, Y.G., Johnson, J.G.(†), Lee, D.E., MacKinnon, D.I., Racheboeuf, P.R., Smirnova, T.N. & Sun, D.L. 2006. Treatise on Invertebrate Paleontology, Part H, Brachiopoda (Revised). Volume 5: Rhynchonelliformea (part): 1689–2320. Online. Reference page. 

• Gwynioidea – Taxon details on Fossilworks.
• Gwynioidea in the World Register of Marine Species