Figure 15. A–D in Middle to Late Ordovician (Darriwilian-Sandbian) Conodonts from the Dawangou Section, Kalpin Area of the Tarim Basin, Northwestern China

Figure 15. A–D, Parapanderodus striatus (Graves & Ellison, 1941). Slightly asymmetrical element; A, NIGP 152969, Nj291, lateral view (IY158-013); B–C, NIGP 152970, Nj297, B, lateral view (IY159-001), C, lateral view, close up showing fine surface striation (IY159- 002); D, NIGP 152971, Nj297, lateral view (IY159-003). E–F, Periodon grandis (Ethington, 1959). E, M element, NIGP 152972, Nj406, anterior view (IY161-006); F, Sa element, NIGP 152973, Nj406, posterior view (IY161-008). G–N, Protopanderodus? nogamii (Lee, 1975). G–K, Pa element; G–I, NIGP 152974, AFT-X-K13/13, G, I, lateral views (IY167-009, IY167-011), H, basal view (IY167-010); J–K, NIGP 152975, AFT-X-K13/13, J, lateral view (IY167-014), K, lateral view, close up showing striation, basal wrinkles and longitudinal furrow (IY167-015). L, Sa element, NIGP 152976, AFT-X-K13/13, basal-lateral view (IY167-016). M–N, Sb element; M, NIGP 152977, AFT-X-K13/13, inner lateral view (IY167-019); N, NIGP 152978, AFT-X-K13/13, outer lateral view (IY167-021). Scale bars 100 µm.