Fig. 3.7 Ordovician jawless fishes: reconstnictions of (a) Astraspis from thc Ordovidan of North America, in dorsal view, and (b) Sacabambaspis, from ihe Ordovician of Bolivia, in side view,
[ Figurę (a) afterSansom efai., 1997; (b) after Gagnier, 1993 and Sansom etaL, 2001.]
Astraspis
Sacabambaspis