Figure 6.

Position of the hypural diastema and the earliest developing caudal lepidotrichia in juveniles (A–C) and adults (B–D) of spotted gar (A–B) and teleosts (C–D). Zebrafish (Danio rerio) is here used as a representative teleost. The notochord is represented in light grey, the haemal elements are in dark grey with the first hypural in black. Plates of connective tissue are represented by a green shape. A blue arrow points at the hypural diastema in teleosts and gar. Caudal lepidotrichia are represented in red with the earliest developing lepidotrichia marked with an oval at their base. Dotted lines represent the main axis of the species’ body. Fulcra are represented with plain black ovals on the dorsal and ventral leading edge of the fin in gar (B). Abbreviations: af, anal fin; df, dorsal fin.