Fig. 3.

Mineralization of the compound terminal vertebra. A–I. Zebrafish larvae incubated in Alizarin red S and visualized through confocal microscopy. J–L. 3D reconstructions of cleared and stained individuals visualized through confocal microscopy. Red arrowhead points to the lateral middle ridge or crest. Terminology: cU1 + 2, ural chordacentrum 1 + 2; cU1–3, ural chordacentra 1 to 3; H1–5, hypurals 1 to 5; haPU1, haemal arch of the preural centrum 1; naU1-U2, neural arch of the ural centra 1 or 2; PH, parhypural; PL, pleurostyle. Scale bar: 100 μm