FIG. 26. — Nostolepis timanica n in Devonian acanthodians from Severnaya Zemlya Archipelago (Russia)

FIG. 26. — Nostolepis timanica n. sp., scale histology, Pioneer Island, sample P-10-1, Lower Devonian, Member 8; A, vertical longitudinal section through the central part of scale, anterior to right, thin section 3375; B, vertical transverse section through the anterior part of scale, thin section 3376; C, vertical transverse section through the posterior scale part, thin section 3377; D, E, vertical longitudinal sections through the scale with maximum vaulted, convex base (D) and maximum flattened scale (E), anterior to right (D) and to left (E), thin sections 3378 and 3379. Abbreviations: avc, ascending vascular canal; cbo, cellular bone; dt, dentine tubule; gl, growth lamella; lsh, longitudinal Sharpey's fibres; rvc, radial vascular canal; smd, simple mesodentine. Scale bar: 0.1 mm.