Fig. 5

Skeletal patterns of pectoral fins of larvae. Lateral (a–d, f–h, k–m) and ventral views (e, i, j) of pectoral fins of planktonic larvae at 3.0–13.6 mm TL stained with alcian blue and alizarin red (n = 1 each stage). b, c, g, h, l, m Magnified views from the indicated images. Arrowheads in (b, c, g, h, l, m) indicate thin matrix septa within dividing cells. cl, cleithrum; ed., endoskeletal disc; ff, fin fold; mdz, zone of matrix decomposition; pop, postcoracoid process; prp, precoracoid process; pel, pelvic bone primordium; sco, scapulocoracoid. Scale bars, 100 μm in (d, e, i, j); 50 μm in (a, f, k); 10 μm in (b, c, g, h, l, m)