Spondylozoa

Spondylozoa includes the vertebrate fauna on Sagan 4.

Domain: Eukaryota
 * Kingdom: Carpozoa
 * Phylum: Spondylozoa
 * Class: Caudopodosauria
 * Class: Caudopodosauriformes
 * Class: Ichthyoida
 * Class: Proichthya
 * Class: Saganichthyes
 * Class: Saganisuchia