Figure 4: Dorsal view of the skull of Polypterus in comparison to three stem tetrapods and three other early osteichthyans. | Nature Communications

Figure 4: Dorsal view of the skull of Polypterus in comparison to three stem tetrapods and three other early osteichthyans.

From: Spiracular air breathing in polypterid fishes and its implications for aerial respiration in stem tetrapods

Figure 4

(a) Polypterus. (b) Gogonasus23. (c) Tiktaalik24. (d) Ventastega25. (e) Ligulalepis (modified from Basden et al.27). (f) Guiyu (reconstructed based on study material from Zhu et al.28). (g) Onychodus29. Polypterus is shown with both the spiracular valve closed (left) and open (right).

Back to article page