Figure 1 in Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae)

Figure 1. Lateral view of the forelimbs of palaeognath embryos. A–C, Dromaius novaehollandiae: A, stage 35 (RM 8053); B, stage 36 (day 25 of incubation, RM 8023); C, stage 40+ (day 43 of incubation, RM 8039). D–F, Struthio camelus: D, day 15 of incubation (YPM 112437); E, day 21 of incubation (YPM 112444); F, day 36 of incubation (YPM 112461). G, H, Eudromia elegans: G, day 10 of incubation (YPM 112519); H, day 15 of incubation (YPM 112525). I, J, Rhea americana: I, stage 34 (day 14 of incubation, RM 7217); J, stage 40+ (day 26 of incubation, RM 7223). Grey shaded regions represent cartilage; black regions represent ossified tissue. The density of stippling reflects the relative degree of ossification. Scale bars: 2 mm (A, B, D, E, G, I); 5 mm (C, F, H, J).