Orthonychia parva (Swallow, 1858 in Shumard and Swallow), two juvenile specimens with uncoiled, hook-like protoconchs in various views; Late Pennsylvanian Finis Shale Member, Graham Formation, North-central Texas. (A) SNSB-BSPG 2020 XCI 117. (A1) Oblique anterior view. (A2) Oblique dorsal view. (A3) Dorsal view. (A4) Lateral view, openly coiled protoconch well visible. (A5) Oblique lateral view. (A6) Detail initial whorl including openly coiled protoconch. (A7, A8) Detail early teleoconch at rapid widening of shell, openly coiled protoconch well visible. (A9) Detail of straight part of openly coiled protoconch including initial bulb. (A10) Detail encrustation at transition from smooth protoconch to ribbed early teleoconch. (B) SNSB-BSPG 2020 XCI 118. (B1) Lateral view, openly coiled protoconch well visible. (B2) Apertural view. (B3) Oblique lateral view, openly coiled protoconch well visible. (B4) Oblique anterior view. (B5) Detail of shell to show foliated micro-structure.