Nature research paper: Spiny chondrichthyan from the lower Silurian of South China
, Transversely sectioned fin spine fragment shown in part., showing detail of the spine’s tissue structure. Portion of a longitudinally sectioned pectoral fin spine . cc, calcified cartilage; cb, cellular bone; lz, lamellar zone; vz, vascular zone. Scale bars, 1 mm , 0.5 mm , 0.25 mm , 0.2 mm and 0.05 mm.Optical micrographs , scanning electron micrograph and volume renderings based on synchrotron and microcomputed X-ray tomography data.
admfs, admedian fin spine; al, ascending lamina; bp, basal plate; cb, cellular bone; pfs, pectoral fin spine; pi, pinnal plate; pps, prepectoral spines; s1–4, scales 1–4; sc, scale crown; vl, ventral lamina. Scale bars, 1 mm , 0.5 mm and 0.2 mm .Volume renderings based on synchrotron X-ray tomography data , optical micrograph and scanning electron micrograph .
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