Type
Zone
Age range
494.5–493.5 Ma
Furongian
Jiangshanian
Paibian
Taenicephalus
Elvinia
Dunderbergia
494.5494.4494.4494.4494.3494.3494.2494.1494.1494.1494.0493.9493.9493.9493.8493.8493.7493.6493.6493.6493.5