Rastrites guizhouensis Mu et al.
Lower Silurian, China
Size: 0.5 cm
Spirograptus turriculatus (Barrande)
Lower Silurian, China
Size: 2.5cm
Oktavites
Silurian, Shaanxi, China
Size: 6 x 6cm
Cyrtograptus
Silurian, Shaanxi, China
Sample Size: 15 x 15cm