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Biddulphia subquadrata Boyer 1922
| BoyP-6-7 Biddulphia subquadrata Boyer 1922 Holotype specimen |
| BoyP-6-7 Biddulphia subquadrata Boyer 1922 Holotype specimen |
| BoyP-6-14 Biddulphia subquadrata Boyer 1922 Isotype specimen 1 |
| BoyP-6-14 Biddulphia subquadrata Boyer 1922 Isotype specimen 1 |
| BoyP-6-24 Biddulphia subquadrata Boyer 1922 Isotype specimen 2 |
| BoyP-6-24 Biddulphia subquadrata Boyer 1922 Isotype specimen 2 |
| BoyP-6-24 Biddulphia subquadrata Boyer 1922 Isotype specimen 2 |
