Orthonychia parva (Swallow, 1858 in Shumard and Swallow), Late Pennsylvanian Finis Shale Member, Graham Formation, North-central Texas. (A) SNSB-BSPG 2020 XCI 121. (A1) Apical view. (A2, A3) Apertural views at different angles. (A4, A5) Protoconch remains in lateral view. (A6) Protoconch remains in apical view. (B) SNSB-BSPG 2020 XCI 122. (B1, B2) Apertural views at different angles. (B3, B4) Lateral views at different angles. (B5, B7) Protoconch remains and early teleoconch with strengthened growth lines. (B6) Detail of early teleoconch ornament consisting of strengthened growth lines and very delicate longitudinal lirae. (B8–B10) Protoconch remains in lateral views.