Search the Community
Showing results for tags 'dorsal shield'.
traveltip1 posted a topic in Fossil Hunting TripsI found these, endocast impressions of dorsal shields of the jawless fish Americaspis americana, in the Silurian of Pennsylvania. There are 2 1/3 dorsal shields shown. A complete shield measures approximately 2.4 x 1.0 inches (6.10 x 2.54 cm).